25
15-1 PART 15-1 GENERAL LIGHTING SYSTEM, HORNS AND INSTRUMENTS SERVICE PAGE PART 15-3 SWITCHES, CIRCUIT BREAKERS AND FUSES PART 15-4 PART 15-5 SPECIFICATIONS .. .15-1 15-12 PART 15-2 LIGHTING SYSTEM AND HORNS . .15-6 . . . . 15-24 GENERAL LIGHTING SYSTEM, HORNS AND INSTRUMENT SERVICE Section Page Temperature GaugeTest. . . . . . . . . . . . . . . . . .15-4 Oil Pressure Indicator Light Test. . . . . . . . . . . .15-4 Oil Pressure Indicator GaugeTest- Comet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-4 Charge Indicator Light Test. . . . . . . . . . . . . . . . 15-4 Ammeter Test-Comet, Falcon, Mustang 15-4 Speedometer Tests 15-4 2 Common Adjustments and Repairs. . . .. . . . . .15-4 Horn Adjustment 15-4 3 Cleaningand Inspection 15-4 SingleSpeed Wiper Motor. . . . . . . . . . . . . . . . .15-4 Two Speed Wiper Motor 15-5 D DIAGNOSIS AND TESTING LIGHT TROUBLE DIAGNOSIS GUIDE S. Loose or broken wire to the bulbs. 6. Defectivebeam selector switch. 7. All headlightbulbs burned out. This may be caused by a defective or improperly adjusted alternator voltage regulator (Group 13). ALL HEADLIGHTS DO NOT LIGHT 1. Loose battery cable. 2. Loosequick disconnect or bro- ken wire from the battery to the headlightswitch. 3. Defective headlight switch. 4. Disconnectedor broken wire from the headlight switch to the beamselector switch. 3. Poor ground. INDIVIDUAL LIGHTS DO NOT LIGHT 1. Burnedout bulb. 2. Loose or broken wires to the bulb. 3. Improperly adjusted or defec- tive alternator voltage regulator (Group 13). LIGHTS BURN OUT REPEATEDLY 1. Loose or corroded electrical connections. 2. Excessive vibration. CONTINUED ON NEXT PAGE

Group 15 Lighting, Horns and Instruments

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Page 1: Group 15 Lighting, Horns and Instruments

15-1

PART 15-1GENERAL LIGHTING SYSTEM,

HORNS AND INSTRUMENTSSERVICE

PAGE PART 15-3SWITCHES, CIRCUIT BREAKERS

AND FUSES PART 15-4

INSTRUMENTS PART 15-5

SPECIFICATIONS

.. .15-1 15-12

PART 15-2LIGHTING SYSTEM AND HORNS . .15-6 . . . . 15-24

GENERAL LIGHTING SYSTEM, HORNS ANDINSTRUMENT SERVICE

Section PageTemperature Gauge Test. . . . . . . . . . . . . . . . . .15-4Oil Pressure Indicator Light Test. . . . . . . . . . . .15-4Oil Pressure Indicator Gauge Test-

Comet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-4Charge Indicator Light Test. . . . . . . . . . . . . . . . 15-4Ammeter Test-Comet, Falcon, Mustang 15-4Speedometer Tests 15-4

2 Common Adjustments and Repairs. . . .. . . . . .15-4Horn Adjustment 15-4

3 Cleaning and Inspection 15-4Single Speed Wiper Motor. . . . . . . . . . . . . . . . .15-4Two Speed Wiper Motor 15-5

D DIAGNOSIS AND TESTINGLIGHT TROUBLE DIAGNOSIS GUIDE

S. Loose or broken wire to thebulbs.

6. Defective beam selector switch.7. All headlight bulbs burned out.

This may be caused by a defectiveor improperly adjusted alternatorvoltage regulator (Group 13).

ALL HEADLIGHTS DONOT LIGHT

1. Loose battery cable.2. Loose quick disconnect or bro-

ken wire from the battery to theheadlight switch.

3. Defective headlight switch.4. Disconnected or broken wire

from the headlight switch to thebeam selector switch.

3. Poor ground.INDIVIDUAL LIGHTSDO NOT LIGHT

1. Burned out bulb.2. Loose or broken wires to the

bulb.3. Improperly adjusted or defec-

tive alternator voltage regulator(Group 13).

LIGHTS BURN OUTREPEATEDLY

1. Loose or corroded electricalconnections.

2. Excessive vibration.CONTINUED ON NEXT PAGE

Page 2: Group 15 Lighting, Horns and Instruments

15-2 GROUP 1 5 -LIGHTING SYSTEM, HORNS AND INSTRUMENTS

INSTRUMENT TROUBLE DIAGNOSIS GUIDE

1. Indicator bulb burned out.2. Loose or broken wire from the

light to the indicator switch.

3. Defective oil pressure senderunit (in this part).

OIL PRESSURE INDICATORLIGHT INOPERATIVE

CHARGE INDICATORLIGHT INOPERATIVE

1. Burned out bulb. 2. Loose or broken wires.

CHARGE INDICATORLIGHT STAYS ON ATIDLE

3. Loose fan belt.1. Idle speed too low.2. Parallel resistance wire burned

out.

OIL PRESSURE INDICATORGAUGE INOPERATIVE-COMET

the engine oil pressure sending unit.3. Defective gauge.4. Defective oil pressure sending

unit.

1. Loose or broken wire from theconstant voltage regulator to the oilpressure gauge.

2. Grounded or broken wire from

AMMETER GAUGEINOPERA JIVE-COMET

1. Defective gauge (in this part).2. Loose or broken wires.

3. Charging system malfunction.

FUEL GAUGE ERRATICOR INOPERATIVE

1. Loose or broken wire from theconstant voltage regulator to the fuelgauge.

2. Defective fuel gauge.3. Loose, broken, or shorted wire

from fuel gauge to the fuel tanksending unit.

4. Defective constant voltage reg-ulator.

5. Defective fuel tank sendingunit.

6. Poor ground between fuel tankand body.

TEMPERATURE GAUGEERRATIC OR INOPERATIVE

perature gauge.4. Defective temperature sending

unit.5. Defective constant voltage reg-

ulator.

1. Loose or broken wire from con-stant voltage regulator to the tem-perature gauge.

2. Defective temperature gauge.3. Loose or broken wire from the

temperature sending unit to the tem-

3. Broken or loose wire from orto the constant voltage regulator.

4. Defective ignition switch.

FUEL, TEMPERATURE, ANDOIL PRESSURE GAUGESERRA TIC

1. Loose or corroded constantvoltage regulator ground.

2. Defective constant voltage reg-ulator.

HORN TROUBLE DIAGNOSIS GUIDE

CONTINUED ON NEXT PAGE

Page 3: Group 15 Lighting, Horns and Instruments

TURN INDICATOR TROUBLE DIAGNOSIS GUIDE

WINDSHIELD WIPER TROUBLE DIAGNOSIS GUIDE

TESTINGRefer to Wiring Diagram Manual

Form 7795P-66 for schematics andlocations of wiring harnesses.

HORN TESTThe only test necessary on the

horn is for current draw.

Current Draw TestConnect a voltmeter and ammeter

to the horn and to a voltage supplyas shown in Fig. 1. The normal cur-rent draw for the horns at 12 volts is3.5-5.5 amperes.

switch or a beam selector switch isdefective:

Turn on the headlights, and oper-ate the beam selector switch. If noneof the headlights turn on when thebeam selector switch is operated, yetthe instrument panel lights operate,the headlight switch or the red-yel-low stripe wire from the headlightswitch to the beam control switch isprobably defective. Substitute aknown good switch for the suspectedswitch to determine whether theswitch or the wiring is at fault.

If the headlights operate only withthe beam selector switch in one posi-tion, the selector switch or the wir-ing from the switch to the headlightis defective. Substitute a known goodselector switch for the suspectedswitch to determine whether theswitch or the wiring is at fault.

CONSTANT VOLTAGEREGULATOR TEST

Turn the ignition switch on,check for voltage at the gauge feedwire (black with green stripe) at oneof the gauges. The voltage shouldoscillate between zero and about 10volts. If it does not, the constantvoltage regulator is defective, or

there is a short to ground betweenthe voltage regulator and the gauges.

If a gauge unit is inaccurate ordoes not indicate, replace it with anew unit. If the gauge unit still iserratic in its operation, the sendingunit or wiring to the sending unit isfaulty.

If both the fuel gauge and thetemperature gauge indicate improp-erly and in the same direction, theconstant voltage regulator could bedefective, as it supplies both gauges.

FUEL GAUGE AND FUELLEVEL SENDING UNIT TEST

Disconnect the wire from the fuellevel sending unit and connect it toa known good sending unit. Using ajumper for a ground, connect it tothe sending unit mounting plate andcar frame. Raise the float arm tothe upper stop, the instrument panelgauge should read full. Lower thefloat arm to the bottom stop, thegauge should read empty.

If the gauge reads properly, thesending unit in the gas tank is defec-tive.

If the gauge unit still indicates im-properly or is erratic in its operation,the gauge unit or the wiring to the

Page 4: Group 15 Lighting, Horns and Instruments

15-4 GROUP 15 LIGHTING SYSTEM, HORNS AND INSTRUMENTS

tion terminal and the other to theregulator base. The test light willcome on if the circuit is in properworking order. If the 15 ohm resis-tor or circuit is open, the indicatorlight will operate at full brightnessand the test light will be out.

AMMETER TEST-COMET,FALCON, MUSTANG

To test the ammeter, turn theheadlights on with the enginestopped. The meter pointer shouldmove toward the D or dischargescale. If no movement of the needleis observed, check the rear of themeter housing to see if the batteryto circuit breaker wire connectionsare loose. If the connections aretight, and the meter does not indi-cate a discharge, the meter is inop-erative. If the meter pointer movestoward the C or charge scale whenthe headlights are turned ON, thewire connections at the meter are re-versed. When the headlights areturned on, the battery is reversed, orthe wire passes through the loop inthe wrong direction. Feed the wirethrough in the opposite direction tocorrect this condition, after checkingfirst to make sure that the battery isnot reversed.

SPEEDOMETER TESTSTo test the odometer accuracy,

drive the car over a measured mile.Speedometer accuracy can bechecked by comparing the speedom-eter in question against one knownto be accurate, while two cars aremoving at the same speed, or bytiming the car on a measured mile.The Ford Car Master Parts Cata-log or the Lincoln-Mercury Partsand Accessories Catalog show theproper combination of gears to usefor various rear axle and tire sizecombinations.

gauge unit is faulty. Repair the wireor replace the gauge unit.

TEMPERATURE GAUGE TESTStart the engine and allow it to

run at 1200 rpm for 30 minutes.Place a thermometer in the coolantat the radiator filler cap. The tem-perature should read a minimum of180oP., and the gauge in the instru-ment panel should indicate withinthe normal band.

If the gauge does not indicate,short the temperature sender unitterminal wire to ground (ignitionswitch on). Do not leave the senderwire grounded longer than necessaryto make the test, as the gauge maybe damaged. If the gauge now indi-cates, the sender unit is defective ornot properly sealed to the engine. Besure to use an electrically conductivesealer C3AZ-19554-B. If the gaugedoes not indicate, the gauge, thewires leading to the gauge, or theconstant voltage regulator are atfault.

OIL PRESSURE INDICATORLIGHT TEST

To test the indicator light, turn onthe ignition switch. Do not start theengine. The light should come on.Start the engine. The light should goout, indicating that the oil pressurehas built up a safe value.

To test the oil pressure switch onthe engine, turn the ignition switchon, engine not running, the indicatorlight should come on. If the indica-tor light does not come on, short theterminal of the oil pressure switchunit to ground. If the light nowcomes on, the oil pressure switch isdefective or not properly sealed tothe engine. Be sure to use electrical-ly conductive sealer C3AZ-19554-B.If the light still does not come on,the bulb is burned out or the wiresfrom the bulb to the ignition switch

a?d oil pressure switch are defective.

OIL PRESSURE INDICATORGAUGE TEST-COMET

Remove the oil pressure senderunit and temporarily attach an oilpressure gauge in its place. Operatethe engine to determine the oil pres-sure. If the oil pressure is normal,the gauge should indicate within thenormal band.

If the gauge did not indicate, mo-mentarily short the oil pressuresender wire to ground. Do not leavethe sender wire grounded longerthan necessary to make the test, asthe gauge may be damaged. If thegauge now indicates, the sender unitis defective or not properly sealed tothe engine. Be sure to use electri-cally conductive sealer C3AZ-19554-B. If the gauge does not in-dicate, the gauge, the wires leadingto the gauge or the constant voltageregulator are at fault.

CHARGE INDICATOR LIGHTTEST

To test the charge indicator light,turn the ignition switch on with theengine stopped. The light shouldcome on. If it does not, the bulb isburned out, or the wiring to the lightis defective.

An open resistor wire in the Fordalternator charging system wiringharness will usually cause the chargeindicator light to stay on until theengine speed is increased to severalthousand rpm. This effect will be no-ticed each time the engine is started.In some cases the light will not goout at all.

The charge indicator light may betested with the use of a test lightcontaining a trade number 67 or1155 bulb.

Disconnect the regulator plugfrom the regulator. Turn the ignitionswitch to ACC position. Touch onetest probe from test light to the igni-

COMMON ADJUSTMENTS AND REPAIRS

HORN ADJUSTMENTHorn current can be adjusted by

changing the contact tension. Con-until the current is within the limitsfor the horn being adjusted.

nect the horn as shown in Fig. 1.Turn the self-locking adjusting nut

CLEANING AND INSPECTION

SINGLE-SPEED WIPER MOTOR1. Clean the gear housing of all

old grease. Do not allow any clean-

ing fluid to contact the armatureshaft and output shaft bearings.

2. Wipe all other parts with aclean cloth.

3. Cover the motor housing bear-

Page 5: Group 15 Lighting, Horns and Instruments

PART 15-1 - GENERAL LIGHTING SYSTEM, HORNS AND INSTRUMENT SERVICE 15-5

jng, and blowout any dust from thehousing with compressed air.

4. Inspect the armature for burnedcommutator bars and loose connec-tions. Check all shafts, bushings, andgears for scored surfaces. Check thethrust ball for pitting or discolorationdue to heat. Make sure that the out-put gear is not loose on the outputshaft, and that the cam surface isnot worn. Replace any defectiveparts.

5. Check the armature forgrounds with a test light. Replace thearmature if it is grounded.

6. Inspect the brush plate assem-

TWO-SPEED WIPER MOTOR1. Clean the gear housing of all

old grease. Do not allow any clean-ing fluid to contact the armatureshaft and output shaft bearings.

2. Wipe all other parts with aclean cloth.

3. Inspect the gear housing forcracks or distortion. Replace acracked or distorted housing.

4. Check all shafts, bushings, andgears for scored surfaces. Replacedefective parts and add new greaseto the housing and gears.

bly for cracks or distortion. Thebrush holders should be securely fas-tened to the brush plate. Inspect thecontact points for burned or pittedsurfaces. Replace defective parts.

7. Inspect the motor housing andmagnet assembly. Replace the as-sembly if it has a cracked magnet, orif the thrust button is hollowed outto a diameter greater than 1/32 inch.

8. Replace the brushes if they areworn to 5/16 inch. Replace distortedor burned brush springs.

9. Add new grease to the hous-ing and gears.

Page 6: Group 15 Lighting, Horns and Instruments

15-6

LIGHTING SYSTEM AND HORNS

Page. . .15-6. . .15-6. . .15-6. . .15-6. . .15-6

Page. .15-8. .15-8. .15-8. .15-8. .15-8. .15-8. .15-8. .15-8. .15-8

SectionHeadlights. . . . . . . . . . . . . . . . . . . . . .Parking Light. . . . . . . . . . . . . . . . . . .Tail, Stop, and Back-Up Light BulbsTachometer Light Bulbs. . . . . . . . . . .License Plate Light Dome Light. . . . . . . . . . . . . . . . . . . . .

Instrument Lights Horns. . . . . . . . . . . . . . . . . . . . . . . . . .

Horn Button. . . . . . . . . . . . . . . . . . . .

. .15-7

Section1 Description and Operation Headlights. . . . . . . . . . . . . . . . . . . . . . . . . .

Horns. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 In-Car Adjustments and Repairs. . . . . . .

Headlight Alignment No.1 Headlight High Beam Adjustment-

Lower Lights. . . . . . . . . . . . . . . . . . . . . .No.2 Headlight Low Beam Adjustment-

Upper Lights 3 Removal and Installation. . . . . . . . . . . . . . . .15-7. .15-8

DESCRIPTION AND OPERATION

Refer to Wiring Diagram ManualForm 7795P-66 for locations of wir-ing harnesses. Schematics are shownin Group 22 of this manual.

terminals are color coded. Likecolored terminals are connected to-

gether.

HORNS

A pair of tuned horns are used.The horn button closes the circuit tothe horns. One of the horns has a

high-pitched tone; the other has alow-pitched tone.

HEADLIGHTS

The Falcon and Mustang use two

No.2 type sealed-beam headlights.

Each light has low-beam and high-

beam filaments.

The Comet and Pairlane use four

sealed-beam headlights. The No.1light is in the lower position and the

No.2 light is in the upper position.

A conventional beam selector

switch is located on the floorboardat the left of the driver.

Quick disconnect terminals are al-so provided at the left and right of

the radiator support assembly. The

IN-CAR ADJUSTMENTS AND REPAIRS

HEADLIGHT ALIGNMENTESTABLISH VERTICAL CENTERLINE ON WALL

,POINTS. ARRIVED AT BY SIGHTING OVER 20"UPRIGHTS. REPRESENT THE 20" HEIGHT

REGARDLESS OF ACTUALDISTANCE FROM FLOOR--

CENTERLINE OF FRONTSURFACE OF HEADLIGHT BULB

---

ESTABLISH 20"HORIZONTAL

LINE ONWALL

~

---"

25 FEET

~

--~~

PLACE WHERE CENTERLINE OF FRONT AXLEWOULD BE, WITH VEHICLE IN --

Kl086-CPLACE WHERE CENTERLINE OF REAR AXLEWOULD BE,. WITH VEHICLE IN POSITION

FIG. 1-Floor and Wall Layout

portion of the shop floor. Layoutthe floor and wall as shown in Fig. 1.

All headlight adjustments should

be made with a half-full fuel tank

plus or minus one gallon, with a per-son seated in the driver's seat and a

person in the passenger seat, the carunloaded and the trunk empty ex-

cept for the spare tire and jacking

equipment, and recommended pres-sure in all tires. Before each adjust-

ment, bounce the car by pushing onthe center of both the front and rear

bumpers, to level the car.

To align the No.1 headlights by

means of a wall screen, select a levelEstablish the headlight horizontal

centerline by subtracting 20 inches

Page 7: Group 15 Lighting, Horns and Instruments

I. DIMENSION "A"from the actual measured height of

the headlight lens center from the

floor and adding this difference to the

20-inch reference line obtained by

sighting over the uprights to obtain

dimension B (upper diagram Fig.

2). Draw a horizontal line 2 inches

below, and parallel to the headlight

horizontal centerline. Then draw the

headlight vertical centerlines on the

screen as measured on the car (di-

mension A, upper diagram Fig. 2).

HEADLIGHTS 25 FEETFROM WALL

NO.1 LIGHT HIGH BEAM DIAGRAM

I . DIMENSION "A" ~ I

NO.1 HEADLIGHT HIGH BEAM

ADJUSTMENT-LOWER LIGHTS

NO.2 LIGHT LOW BEAM DIAGRAM K1192-C

Adjust each No.1 headlight beamas shown in Fig. 2 upper diagram.Cover the No.2 lights when making

this adjustment.Some states may not approve of

the 2-inch dimension for the No.1headlights. Check the applicable statelaw, as a 3-inch dimension may be

required.

2-Headlight Wall Screens

NO.2 HEADLIGHT LOW BEAM

ADJUSTMENT-UPPER LIGHTS

To align the No.2 headlights (up-per lights), a new wall chart is used.Dimension B for the No.2 lights willbe different than B for the No.1lights, but dil)1ension A which ismeasured on the car will be the sameas for the No.1 lights. Note that the

line of adjustment of the No.2 lights

is the horizontal centerline of the No.2 lights. Turn the headlights to lowbeam and adjust each No.2 light as

shown in Fig. 2.Each headlight can be adjusted by

means of two screws located under

the headlight trim ring. Always bringeach beam into final position by turn-ing the adjusting screws clockwise sothat the headlights will be heldagainst the tension springs when the

operation is completed (Fig. 3).

1628-A

3-Headlight Adjustment-Comet

Page 8: Group 15 Lighting, Horns and Instruments

REMOVAL AND INSTAllATION

INSTRUMENT LIGHTSThe instrument panel light bulbs

can be replaced by pulling out theindividual light sockets from the rearof the instrument panel.

HORNSDisconnect the horn wire from the

terminal. Remove the horn mountingbracket to horn retaining screws andremove the horn.

To install, mount the horn in posi-tion, then connect the horn wire tothe horn terminal.

HEADLIGHTS1. Remove the screws and remove

the headlight trim ring (Fig. 3).2. Place a hand over the head-

light assembly and unhook the springfrom the retaining ring.

3. Remove the retaining ring byunhooking the ring from the clip lo-cated directly across the bulb fromthe spring hook.

4. Pull the headlight bulb forwardand disconnect the wiring assemblyplug.

5. Plug in the new bulb and placeit in position, locating the bulb glasstabs in the positioning slots.

6. Hook the retaining ring overthe clip, then over the bulb and se-cure it with the existing ball-ringspring.

7. Align the bulb with the wallscreen.

8. Install the trim ring in posi-tion and install the retaining screws.

PARKING LIGHTThe parking light is shown in Fig.

4. To replace the bulb, remove thelens retaining screws and the lens.

TAIL, STOP, AND BACK-UPLIGHT BULBS

To replace the tail, stop, and/ orthe back-up lights, remove the re-taining screws and remove the lens,

HORN BUTTON1. Disconnect the horn wire con-

nector, that has a yellow and a yel-low-green wire in it, under the in-strument panel, to the left of thesteering column.

2. Press down evenly on the hornbutton and turn counter-clockwiseuntil it lifts out from the steeringwheel.

3. Remove the horn button andspring.

4. The horn button contacts are in-tegral with the turn signal switch andare removed with the switch.

5. Install the horn button springand button.

6. Connect the horn wire connec-tor under the instrument panel.

FIG. 4-Parking Light-Typical

then remove the bulb.

TACHOMETER LIGHT BULBSTo replace the light bulb in either

the Sun, or the Sprint tachometer, itis necessary to remove the tachome-ter from its mounting. In the case ofthe Sprint tachometer it is also nec-essary to remove the tachometerfrom its outside housing. The snap-in bulb socket is then pulled out forreplacement of the bulb.

On the Rotunda tachometer thebulb is not serviceable.

LICENSE PLATE LIGHTTo replace the bulb, remove the

bezel retaining screw, bezel, and lens.

DOME LIGHTRemove the two screws retaining

the dome light lens. Remove the lensand then replace the bulb.

Page 9: Group 15 Lighting, Horns and Instruments

15-9

SWITCHES,FUSES

CIRCUIT BREAKERS, AND

Page.15-9.15-9.15-9.15-915-1015-1015-10

Page15-1015-1015-1015-1115-1115-11

SectionStop Light Switch Dome Light Switch Ignition Switch and Lock Cylinder

Windshield Wiper Switch. . . . . . . .Neutral Start Switch. . . . . . . . . . . .Back-Up Light Switch. . . . . . . . . . .

Section1 Description and Operation. . . .

Headlight Switch Fuse Panel Mechanical Stop Light Switch.

2 Removal and Installation. . . . .Headlight Switch Headlight Beam Selector Switch

DESCRIPTION AND OPERATION

left side cowl panel except that onFairlane cars it is mounted on thebrake pedal support. Fig. 2 showsthe fuses, their values and locations.

Refer to Wiring Diagram ManualForm 7795P-66 for locations of wir-ing harnesses. Schematics are shownin Group 22 of this manual.

HEADLIGHT SWITCHA combination headlight switch

and two circuit breakers is used (Fig.1). The headlight circuit is protectedby an 18 ampere circuit breakerfor the Comet and Fairlane, a 12ampere circuit breaker for the Fal-con and the Mustang. The tail,parking, license plate light and horncircuits are protected by a 15 am-pere circuit breaker.

K1451-A

MECHANICAL STOP LIGHTSWITCH

The mechanical stoplight switchdiffers from the hydraulic switch for-merly used. The switch assembly isinstalled on the pin of the brake ped-al arm so that it straddles the mastercylinder push rod. The switch assem-bly is a slip fit on the pedal arm pinand thus the switch assembly moveswith the pedal arm whenever thebra~e pedal is depressed.

The brake pedal arm pin has a de-signed-in clearance with the eye ofthe master cylinder push rod (Fig.3). Because of this clearance, when-ever the brake pedal is pushed for-ward, the stop light switch contacts,moving with the pedal arm, are ac-tually pushed against the end of themaster cylinder push rod, through theswitch actuating pin. It is this move-ment of the switch with respect tothe actuating pin and master cylin-der push rod that closes the switchcontacts completing the circuit to thestoplights.

When the brake pedal is released,the spring in the stop light switch re-turns the actuating pin to its normalposition and the circuit to the stoplights opens.

1 -Headlight Switch

FUSE PANELThe fuse panel is mounted on the

Page 10: Group 15 Lighting, Horns and Instruments

GROUP 1 5 -LIGHTING SYSTEM, HORNS AND INSTRUMENTS1 5-10

FIG. 3-Mechanical Stoplight Switch Operation

mounting screws (Fig. 4). Discon-nect the wire terminal block from theswitch.

FIG. 4-Headlight BeamSelector Switch

rod and the nylon washers and bush-ing away from the pedal, and removethe switch (Fig. 5).

3. Position the switch, push rod,and bushing and washers on thebrake pedal pin, in the order shownin Fig. 5, and install the hairpin re-tainer.

4. Connect the wires at the con-nector, and install the wires in theretaining clip (Fig. 5).

DOME LIGHT SWITCHThe dome light switch is part of

the headlight switch. It is actuatedby rotating the switch control knobto the maximum counterclockwiseposition. The dome light and head-light switch is replaced as a unit (Fig.1).

IGNITION SWITCH ANDLOCK CYLINDER

1. Disconnect the negative cablefrom the battery.

2. Turn the ignition key to the ac-cessory position. Slightly depress thepin shown in Fig. 6, turn the keycounterclockwise, and pull the keyand lock cylinder out of the switchassembly. If only the lock cylinder is

To install the switch, connect theterminal block to the switch and in-stall the switch to the floor. Replacethe floor mat.

STOP LIGHT SWITCH1. Disconnect the wires at the con-

nector.1. Remove the hairpin retainer,

slide the stOD lieht switch. the Dush

HEADLIGHT SWITCH1. Disconnect the battery ground

cable.2. Remove the control knob and

shaft by pressing the knob releasebutton on the switch housing (Fig. 1),with the knob in the full ON posi-tion. Pull the knob out of the switch.

3. Unscrew the mounting nut, re-move the switch, then remove thejunction block from the switch.

4. To install the switch, connectthe junction block to the headlightswitch, position the switch in the in-strument panel, and install themounting nut.

5. Install the knob and shaft as-sembly by inserting it all the way in-to the switch until a distinct click isheard. In some instances it may benecessary to rotate the shaft slightlyuntil it engages the switch-contactcarrier.

6. Connect the battery ground ca-ble.

HEADLIGHT BEAMSELECTOR SWITCH

Lay the floor mat back from thearea of the switch. and remove the

Page 11: Group 15 Lighting, Horns and Instruments

PART 15-3 - SWITCHES, CIRCUIT BREAKERS, AND FUSES 1 5-11

RELEASE-PIN HOLE Kl176-A

FIG. 6-Typical Ignition SwitchRemoval

9. If a new lock cylinder is to beinstalled, insert the key in the cylin-der and turn the key to the accessoryposition. Place the lock and key inthe ignition switch, depress the pinslightly (Fig. 6) and turn the keycounterclockwise. Push the lock cyl-inder into the switch. Turn the keyto check the lock cylinder operation.

10. Connect the battery cable andcheck the ignition switch.

4,4",...,..., 2B129 NYLON WASHER

_13480STOP LIGHTI SWITCH ASSEMBLYI

puSH ROD THRU- DA~PANEL TO~ASt~ CYLINOER

"rr .--, HA)RPINRETAINER

'1'~

BUSHING

BRAKE PEDAL-- ,r 28129 NYLON WASHER

FIG. 5-Mechanical Stoplight Switch Assembly

K1157.B

WINDSHIELD WIPER SWITCH

1. Disconnect the battery cable.2. Remove the wiper switch knob,

bezel nut, and bezel.3. Pull out the switch from under

the instrument panel. Disconnect theplug connector from the switch andremove the switch.

4. Position the switch and con-nect the plug connector.

5. Position the switch in the in-strument panel and install the bezel,bezel nut, and knob.

6. Connect the battery cable andcheck the operation of the switch.

NEUTRAL START SWITCH

See Part 7-2 for replacement ofthe neutral start switch on carsequipped with automatic transmis-sions.

switch and turn the slot in the switchto a full counterclockwise position.

6. Connect the insulated plugwith wires to the back of the ignitionswitch. Position the accessory andgauge wires on the ignition switchstud and install the retaining nut.

7. Position the spacer on theswitch with the open face away fromthe switch.

8. Place the bezel, switch, andspacer in the switch opening, pressthe switch toward the instrumentpanel and rotate it 1/8 turn to lockit in position.

BACK-UP LIGHT SWITCH

On cars equipped with the steeringcolumn standard shift, the switch islocated on the lower end of the steer-ing column.

On cars equipped with a shift le-ver directly over either the standardor automatic transmissions, the back-up light switch is located on thetransmission.

to be replaced, proceed to Step 9.3. Press in on the rear of the

switch and rotate the switch 1/8 turncounterclockwise (as viewed from theterminal end). Remove the bezel,switch, and spacer.

4. Remove the nut from the backof the ignition switch. Remove theaccessory and gauge feed wires fromthe accessory terminal of the switch.Pull the insulated plug from the rearof the switch.

5. If a new ignition switch is tobe installed, insert a screwdriver intothe lock opening of the ignition

Page 12: Group 15 Lighting, Horns and Instruments

15-12

INSTRUMENTS

Page15-1215-1215-1215-1315-13

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15-2015-21

15-1515-21

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15-21

15-2115-22

15-22

15-2315-2315-23

SectionCharge Indicator Gauge-Comet Electric Clock-Fairlane .""""",."

Turn Indicator Switch Turn Indicator Flasher. . . . . . . . . . . . . . . . .

Emergency Warning Flasher. . . . . . . . . . . .Speedometer-Fairlane .. . . . . . . . . . . . . . . .Speedometer-Comet Speedometer-Falcon, Mustang. . . . . . . . . .

Speedometer Cable """"""""""Windshield Wiper Switch-Fairlane Windshield Wiper Motor-Except Fairlane

Windshield Wiper Motor-Fairlane Wiper Pivot Shaft and Link. . . . . . . . . . . . .

4 Major Repair Operations. . . . . . . . . . . . . . .Disassembly-Permanent Magnet Type

Single or Two-Speed Electric WiperMotor. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts Repair or Replacement. . . . . . . . . . . .Assembly-Permanent Magnet Type

Single or Two-Speed Electric WiperMotor. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Windshield Wiper Motor Park SwitchTest and Adjustment-Single andTwo-Speed Permanent Magnet Type. . . .

Disassembly-Oscillating Type Two-Speed Electric Wiper Motor. . . . . . . . . .

Parts Repair or Replacement. . . . . . . . . . . .Assembly-Oscillating Type Two-

Speed Electric Wiper Motor. . . . . . . . . .Electro-Pneumatic Governor

and Control Selector Switch-Comet ...Speedometer Diagnostic Procedures. . . . . .Speedometer Repair Procedures

Section1 Description and Operation. . . . . . . . . . . . . .

Gauges Constant Voltage Regulator. . . . . . . . . . . . .

Fuel Gauge. . . . . . . . . . . . . . . . . . . . . . . . . .

Temperature Gauge Charge Indicator Light-Except

Comet. . . . . . . . . . . . . . . . . . . . . . . . . . . .Charge Indicator Gauge-Comet . . . . . . . . .Oil Pressure Indicator Light-Except Comet

Oil Pressure Indicator Gauge-Comet Turn Indicator. . . . . . . . . . . . . . . . . . . . . . . .

Emergency Warning Flasher. . . . . . . . . . . .Speedometer. . . . . . . . . . . . . . . . . . . . . . . . .Windshield Wiper-Comet . . . . . . . . . . . . . .

2 In-Car Adjustments and Repairs. . . . . . . . .Windshield Wiper Blade Adjustment. . . . . .

3 Removal and Installation. . . . . . . . . . . . . . .Instrument Cluster-Except Fairlane Instrument Panel Control Identification

Lens-Fairlane , Auxiliary Instrument Cluster-

Mustang Rally Pac Constant Voltage Regulator-Comet Constant Voltage Regulator-Fairlane Fuel Gauge-Falcon, Mustang Fuel Gauge-Comet Fuel Gauge-Fairlane Fuel Sending Unit Temperature Gauge-Except Comet. . . . . .

Temperature Gauge-Comet Temperature Sending Unit. . . . . . . . . . . . . .

Oil Pressure Indicator Gauge-Comet Oil Pressure Sending Unit or Oil

Pressure Switch 15-18

DESCRIPTION AND OPERATION

Refer to Wiring Diagram ManualForm 7795P-66 for locations of wir-ing harnesses. Schematics are shownin Group 22 of this manual.

All of the instruments are electri-cally operated except the speedome-ter. Brightness of the instrument pan-el lights is controlled by a rheostaton the lighting switch.

GAUGESThe instrument cluster for the Fal-

con, Fairlane and Mustang includesa fuel gauge, temperature gauge,charge indicator light, oil pressureindicator light, speedometer, high-beam indicator light, and a left andright-hand turn signal indicator light.

The instrument cluster for the

Comet includes the same componentsexcept that an oil pressure indicatorgauge and a charge indicator gaugeare used instead of indicator lights.There are also separate left-and-right-hand turn signal indicatorlights in the instrument panel.

CONSTANT VOLTAGEREGULATOR

The constant voltage regulator(Fig. 1) used with the fuel, tempera-ture, and oil gauges maintains anaverage value of 5.0 volts at thegauge terminals.

The regulator operates by meansof a bimetallic arm and a heatingcoil. When the ignition switch isturned on, the heating coil (Fig. 1)

Page 13: Group 15 Lighting, Horns and Instruments

TEMPERATURE SENDING UNIT

~rlfcheats the bimetallic arm causing itto bend and break the contacts, dis-connecting the voltage supply fromthe heating coil. The bimetallic armthen cools and brings the contactstogether again. The making andbreaking of the contacts, causes apulsating voltage, with an effectiveaverage value of 5.0 volts to be sup-plied to the gauges. Although thesepulsations are quite rapid, there isin each gauge a bimetallic arm whichchanges temperature quite slowly,and this assures steady average read-ings.

As the pulsating voltage wouldnormally cause radio interference, aradio interference suppression chokeis connected in series with the con-stant voltage regulator supply wire.

FUEL GAUGEThe fuel gauge consists of a send-

ing unit, located on the gas tank,and a remote register unit (fuelgauge) mounted in the instrumentcluster. The remote register unitpointer is controlled by a bimetallicarm and heating coil. The sendingunit is a rheostat that varies its re-sistance depending on the amount offuel in the tank. The rheostat is op-erated by a float control. As the fuellevel rises or falls the float controlarm moved by the float, varies theresistance.

-, " """J""'*'*"'. ~-""""""c-OIL PRESSURE SWITCH K1525-A

FIG. 2-Temperature Senderand Oil Pressure Switch-Falconand Comet V-8

TEMPERATURE SENDER

the ignition switch is first turned on,and it should go out when the enginecomes up to speed. The light is con-nected between the oil pressureswitch unit mounted on the engine atthe left rear on the six, above the oilfilter on the V -8 (Fig. 2), and the coilterminal of the ignition switch.

OIL PRESSURE INDICATORGAUGE-COMET

The meter-type oil pressure gaugeconsists of a sending unit on the en-gine above the oil filter on the V-8(Fig. 3), at the left rear on the six,and a remote register unit in the in-strument cluster.

The sending unit operates by vary-ing resistance according to actualoil pressure against it, which in turnoperates the oil pressure gauge.

TURN INDICATORThe turn indicator uses the dual

filament parking lights as indicatorlights.

The turn indicator flasher is lo-cated in the back of the instrumentpanel, On the steering column brace.

On the Mustang the flasher ismounted on the front side of the airduct.

EMERGENCY WARNINGFLASHER

The emergency flasher warningsystem is controlled by a combinationswitch and flasher assembly. All turnsignal lights can be made to flashat the same time by closing theswitch of the switch-flasher assembly.

SPEEDOMETERThe speedometer is connected to

the output shaft of the transmissionby means of a flexible shaft, and adrive gear located inside the trans-mission. The flexible shaft drives thespeedometer which registers speed inmiles per hour and also drives anodometer which records distancetraveled in miles and tenths of amile.

OIL PRESSURE SWITCH- K 1627-A

FIG. 3-Temperature and OilPressure Sender-Fair lane 6

CHARGE INDICATORGAUGE-COMET

The charge indicator gauge is anammeter, which indicates whetherthe ,battery is being charged or dis-charged. The ammeter is non-adjust-able and should be replaced if provedto be defective.

TEMPERATURE GAUGEThe temperature gauge consists of

a sending unit mounted in the cylin-der head at the top front on theV-8 (Fig. 2 or 3), left rear on thesix, and a remote register unit, (tem-perature gauge) mounted in the in-strument cluster.

Changes of engine temperaturevary the resistance of the sendingunit which in turn operates the tem-

perature gauge.

CHARGE INDICATORLIGHT-EXCEPT COMET

A red alternator charge indicatorlight is used. This light flashes on ifthe battery is discharging and the al-ternator is not supplying current.

When the ignition switch is closed,battery current flows through thecharge indicator light and 15-ohmparallel resistor, and through the reg-ulator voltage limiter contacts to thefield.

When the alternator builds upenough voltage to close the field re-lay contacts, full voltage is appliedto the field, and the charge indicatorlight goes out.

WINDSHIELD WIPER-COMETThe Comet wiper provides high

speed (65 to 75 cycles per minute)constant wiping action, and also in-termittent low speed (5-30 cycles perminute), intermittent wiping action.This low speed operation is basednot on a low speed wiping stroke buton an adjustable dwell period in thepark position.

The intermittent wiper is operatedthrough the use of a dual knob. Theouter or large knob, when in the cen-

OIL PRESSURE INDICATORLIGHT-EXCEPT COMET

A red indicator light flashes onwhen the oil pressure is below a safevalue. The light should come on when

Page 14: Group 15 Lighting, Horns and Instruments

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Page 15: Group 15 Lighting, Horns and Instruments

PART 15-4 INSTRUMENTS 15-15

ously, the rotational movement ofthe valve cam applies manifold vac-uum to the upper chamber of thegovernor, thus beginning a new cycle.

If the engine is subjected to suddenacceleration as in passing, the avail-able manifold vacuum will be great-ly reduced. When the vacuum lossbecomes sufficient to allow the elec-trical switch diaphragm spring toovercome the vacuum, the switchwill be moved to the closed positionproviding continuous wiper opera-tion. This will continue until the en-gine has returned to an operatingcondition that will provide normalmanifold vacuum. The wipers willthen return to whatever wiper cycledwell had been previously selected.

In the same manner as above, un-der engine acceleration, if any lossof vacuum or pressure in the inter-mittent control system occurs due toa mechanical failure or malfunction,the wipers will automatically shift tocontinuous operation, thereby render-ing the system fail safe (Sketch III,Fig. 4).

ward compressing the diaphragmspring and moving the switch into thepark position. The wiper blades thenmove to the park position and re-main there. (Sketch II, Fig. 4).

Rotation of the governor valvecam that applied vacuum to the gov-ernor switch also opened the uppergovernor chamber to atmosphere.The compressed diaphragm springapplies downward pressure to the dia-phragm creating super atmosphere inthe lower chamber. This is allowedto bleed off thru a variable orificein the control selector. The size ofthis orifice is determined by the posi-tion of the intermittent selector (in-ner knob) and establishes the lengthof wiper cycle dwell (Sketch II, Fig.4).

ter position, turns the system off.When turned fully clockwise, thewiper is in the constant high speedsetting. When turned fully counter-clockwise, the wiper goes on the in-termittent lower speed range. Theintermittent wiper action is controlledby the inner, or small knob.

The intermittent wiper control isan electro-pneumatic system, a gov-ernor located in the engine compart-ment, that allows selection of eithervarying dwell between wipe cycles orcontinuous wiper action thru applica-tion of variable opposing vacuum andpressure within the system.

With the control selector in the in-strument panel turned to intermittentwiper control, engine manifold vacu-um is applied to the upper chamberof the governor (Sketch I, Fig. 4).Atmospheric pressure in the lowerchamber then moves the diaphragmupward. Simultaneous rotation of thegovernor valve cam thru the spiralaction of the follower applies mani-fold vacuum to the diaphragm of thenormally closed electrical switch. Theswitch diaphragm is moved down-

As the diaphragm moves down-ward, the governor valve cam is ro-tated thru the spiral action of thecam follower, opening the lowerchamber of the electrical switch dia-phragm to atmosphere. The com-pressed diaphragm spring moves theswitch into the closed position, actu-ating the wiper motor. Simultane-

IN-CAR ADJUSTMENTS AND REPAIRStions, install the wiper blades sothat they lie flat against the loweredge of the windshield.

cessory position momentarily, withthe wiper switch off. After bringingthe pivot shafts to their park posi-

WINDSHIELD WIPERBLADE ADJUSTMENT

Turn the ignition switch to the ac-

REMOVAL AND INSTAllATIONclock, fuel gauge, and bulbs for thealternator, oil pressure, and hot andcold water temperature.

7. Remove the screws from theright side front of the cluster. Re-move the mask and the lens.

8. Insert and position the new lensand retaining screws.

9. Position the rear cover assem-bly to the front of the cluster andinstall the retaining screws. Installthe clock knob and screw.

10. Position the cluster assemblyand connect all leads and bulbs.

11. Position the cluster assemblyto the instrument panel and installthe retaining screws.

12. Position the radio to the clus-ter and install the nuts and bulbs.

13. Connect the speedometer ca-ble.

14. Connect the battery and checkthe operation of all disconnectedparts.

charge indicator gauge, and speed-ometer, it is necessary to remove theinstrument cluster assembly.

INSTRUMENT PANEL CONTROLIDENTIFICATION LENS-FAIRLANE

1. Disconnect the battery groundcable.

2. Remove the radio, knobs andnuts.

3. Disconnect the speedometer ca-ble.

4. Remove the screws from thecluster assembly and position it out-ward.

5. Disconnect the bulbs, constantvoltage regulator and ground wire,clock and the fuel gauge. Move thecluster assembly to a bench.

6. Remove the clock knob and thescrews retaining the rear cluster cov-er which retains the speedometer,

INSTRUMENT CLUSTER-EXCEPT FAIRLANE

1. Disconnect the battery cable.2. Disconnect the speedometer ca-

ble from the speedometer head.3. Remove the six screws retain-

ing the instrument cluster assemblyto the instrument panel and tilt thecluster forward.

4. Disconnect the wiring and thebulb sockets and remove the clusterassembly.

5. Position the cluster and connectthe wiring and the bulb sockets.

6. Install the instrument cluster as-sembly to the instrument panel withthe six retaining screws.

7. Connect the speedometer cableand the battery cable.

8. Check the operation of allgauges, lights, and signals.

To replace the fuel gauge, tem-perature gauge, oil pressure gauge,

Page 16: Group 15 Lighting, Horns and Instruments

1 5-16 GROUP 15 LIGHTING SYSTEM, HORNS AND INSTRUMENTS

AUXILIARY INSTRUMENTCLUSTER-MUSTANGRALLY PAC

REMOVAL1. Disconnect the battery ground

cable.2. Disconnect the wiring. Note the

color code relationships (for correctassembly later).

3. Remove the mounting clampassembly screws below the steeringcolumn and remove the clamp.

4. Remove the RALLY PAC clus-ter assembly from the steering col-umn.

INST ALLA nON1. Position the RALLY PAC clus-

ter assembly to the steering column.2. Position the mounting clamp

and install the retaining screws.3. Connect the wiring (Fig. 5).4. Connect the battery ground ca-

ble.

6. Install the constant voltage reg-ulator in place with the ground wireand retaining screw and connect theelectrical leads to the regulator.

7. Install the instrument cluster as-sembly to the instrument panel andsecure it with screws.

8. Connect the speedometer cable.9. Check the operation of all dis-

connected parts.

CONSTANT VOLTAGEREGULATOR-FAIRLANE

1. Disconnect the battery groundcable.

2. Remove the radio knobs,mounting nuts and radio.

3. Disconnect the speedometer ca-ble.

4. Remove the screws retainingthe cluster assembly to the instru-ment panel. Position the cluster out-ward.

5. Disconnect the wire leads andremove the mounting screw from the

FUEL GAUGE-FALCON,MUSTANG

1. Remove the instrument clusterassembly.

2. Remove the six screws retain-ing the instrument cluster back plateassembly, and remove the back plateassembly.

3. Remove the two screws retain-ing the fuel gauge to the back plateand remove the gauge.

4. Position the fuel gauge and in-stall the two retaining screws.

5. Position the back plate assem-bly and install the six retainingscrews.

6. Install the instrument cluster as-sembly in the instrument panel.

FUEL GAUGE-COMET1. Disconnect the battery.2. Disconnect the speedometer ca-

ble.3. Remove the screws retaining

the cluster assembly to the instru-

TO TACHOMETER (Red) TO IGNITION SWITCH

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FIG. 5-Rally Pac Wiring ConnectionsK 1573-A

constant voltage regulator and re-move the regulator.

6. Position the new constant volt-age regulator, install the mountingscrew and connect the wire leads.

7. Position the cluster assembly tothe instrument panel and install theretaining screws.

8. Position the radio to the clus-ter and install the nuts and knobs.

9. Connect the speedometer cable.10. Connect the battery and check

the operation of all disconnectedparts.

CONSTANT VOLTAGEREGULA TOR-COMET

1. Disconnect the battery groundcable.

2. Disconnect the speedometer ca-ble.

3. Remove the instrument clusterassembly from the instrument paneland tilt the cluster outward.

4. Disconnect the wires from theconstant voltage regulator.

5. Remove the constant voltageregulator retaining screw and removethe regulator and ground wire fromunder the same screw.

ment panel and position it outward.4. Disconnect the bulbs, tempera-

ture gauge, fuel gauge, constant volt-age regulator, and charge indicatorand remove the assembly to abench.

5. Remove the screws retainingthe back cover of the cluster to thefront of the cluster. There is no clockin this cluster. The light for the oilpressure indicator is in the charge in-dicator gauge.

6. Remove the nuts retaining thefuel gauge.

7. Position the new fuel gauge and

;;:~;;~;~~""':;-'

Page 17: Group 15 Lighting, Horns and Instruments

PART 15-4 INSTRUMENTS 1 5-17

16. Connect the battery and checkthe operation of all disconnectedparts.

install the retaining nuts.8. Position the rear cover to the

front of the cluster with retainingscrews. The rear cover retains allgauges and the speedometer head.

9. Position the cluster assemblyand connect all leads and bulbs.

10. Install the cluster assembly tothe instrument panel and secure itwith screws.

11. Connect the speedometer ca-ble.

12. Connect the battery and checkthe operation of all disconnectedparts.

FUEL SENDING UNIT1. Remove the fuel from the fuel

tank.2. Disconnect the fuel gauge send-

ing unit wire from the sending unit.3. Loosen the hose clamp and dis-

connect the tank line at the sendingunit.

4. Remove any dirt that has ac-cumulated around the sending unitso that it will not enter the tank.

S. Turn the sending unit retainingring counterclockwise and removethe unit, retaining ring, and mount-ing gasket.

6. Clean the fuel gauge sendingunit mounting surface at the fueltank.

7. Position the sending unit andmounting gasket on the fuel tank andsecure with the retaining ring.

8. Connect the sending unit wireand the fuel tank line.

9. Fill the tank with the fuel re-moved.

10. Check the fuel gauge opera-tion and check for leaks.

TEMPERATURE GAUGE1. Remove the instrument cluster

assembly.2. Remove the six screws retain-

ing the instrument cluster back plateassembly and remove the back plate

assembly.3. Remove the two screws retain-

ing the temperature gauge to theback plate and remove the gauge.

4. Position the temperature gaugeand install the two retaining screws.

5. Position the back plate assem-bly and install the six retainingscrews.

6. Install the instrument cluster as-sembly in the instrument panel.

TEMPERA TURE GAUGE-COMET

1. Disconnect the battery.2. Disconnect the speedometer ca-

ble.3. Remove the screws retaining

the cluster assembly to the instrumentpanel and position it outward.

4. Disconnect the bulbs, tempera-ture gauge, fuel gauge, constant volt-age regulator, and ammeter and re-move the assembly to a bench.

5. Remove the screws retainingthe back cover of the cluster to thefront of the cluster. There is no clock

in this cluster. The light for the oilpressure indicator is in the ammeter.

6. Remove the nuts retaining thetemperature gauge.

7. Position the new gauge and in-stall the retaining nuts.

8. Position the rear cover to thefront of the cluster with retainingscrews. The rear cover retains allgauges and the speedometer head.

9. Position the cluster assemblyand connect all leads and bulbs.

10. Install the cluster assembly tothe instrument panel and secure itwith screws.

11. Connect the speedometer ca-ble.

12. Connect the battery and checkthe operation of all disconnectedparts.

TEMPERATURE SENDING UNIT1. Disconnect the temperature

sending unit wire from the sendingunit.

2. Prepare the new temperaturesending unit for installation by apply-ing a small amount of conductivewater resistant sealer C3AZ-19554-B, to the threads.

3. Remove the temperature send-ing unit from the cylinder head andimmediately install the new tempera-ture sending unit.

4. Connect the wire to the tem-perature sending unit.

5. Start the engine and check thesending unit operation.

OIL PRESSURE INDICATORGAUGE-COMET

1. Remove the instrument clusterassembly.

2. Remove the six screws retain-ing the instrument cluster back plateassembly and remove the back plateassembly.

3. Remove the two screws retain-ing the speedometer, the two screwsretaining the speedometer dial to theback plate, and remove the speedom-eter assembly.

4. Remove the two nuts retainingthe oil pressure gauge and removethe gauge.

5. Position the oil pressure gaugeand install the two retaining nuts.

6. Position the speedometer as-sembly and install the "two speedom-eter dial retaining screws and thetwo speedometer retaining screws.

7. Position the back plate assem-bly and install the six retainingscrews.

8. Install the instrument clusterassembly to the instrument panel.

FUEL GAUGE-FAIRLANE1. Disconnect the battery ground

cable.2. Remove the radio knobs,

mounting nuts and radio..3. Disconnect the speedometer ca-

ble.4. Remove the screws retaining the

cluster assembly to the instrumentpanel. Position the cluster assemblyoutward.

5. Disconnect the bulbs, constantvoltage regulator, the clock and fuelgauge. Remove the cluster assemblyto a bench.

6. Remove the clock knob and thescrews retaining the rear clustercover.

The cover retains the speedometer,clock and fuel gauge, also the bulbsfor the alternator charge indicator,oil pressure gauge and the hot-coldengine temperature indicator.

7. Remove the screws retainingthe speedometer head to the coverand four rubber insulators. Removethe head.

8. Remove the nuts retaining thefuel gauge, and remove the gauge.

9. Install the new fuel gauge withmounting nuts.

10. Position the speedometer andinstall the retaining screws at therear. Install the four rubber insula-tors in the front.

11. Position the rear cover assem-bly to the front of the cluster andinstall the retaining screws. Installthe clock knob and screw.

12. Position the cluster assembly.Connect all of the wire leads andbulbs.

13. Position the cluster assemblyto the instrument panel and installthe retaining screws.

14. Position the radio to the clus-ter and install the mounting nuts andknobs.

15. Connect the speedometer ca-ble.

Page 18: Group 15 Lighting, Horns and Instruments

1 5-18 GROUP 15 LIGHTING SYSTEM, HORNS AND INSTRUMENTS

ble and set the clock hands to theexact time.

flasher unit terminals and pull theflasher from its retaining clip. Ob-serve the color code and number onthe cover of the flasher. Be certainto replace it with a new flasher withthe same color code and number onthe cover.

OIL PRESSURE SENDING UNITOR OIL PRESSURE SWITCH

To replace the unit, disconnect thewire from the terminal. Remove theunit from the engine. Apply conduc-tive sealer C3AZ-19554-B to thethreads of the new unit and installthe unit. Connect the wire to the ter-minal and check the operation of theunit.

TURN INDICATOR SWITCH

EMERGENCY WARNINGFLASHER

Pull the flasher from the retainingclip, and disconnect the wires (Fig.6).

REMOVAL1. Disconnect the negative

(ground) cable from the battery.2. Remove the steering wheel hub

and steering wheel retaining nut.3. Remove the steering wheel

from the shaft.4. Disconnect the two wire-con-

nector blocks at the dash panel abovethe steering column.

5. Remove the wires and terminalsfrom the connector blocks. This canbe done by depressing the tab on thewire terminal with an awl, or by in-serting a ball point pen (refill plas-tic type) over the bullet pin and pullthe wire and terminal from the con-nector block. Record the color codeand location of each wire before re-moving it from the connector block.Tape the wires together and attacha piece of heavy cord to the wires tohelp pull the wires through the steer-ing column during installation.

6. Remove the turn indicatorhandle from the side of the steeringcolumn.

7. Remove 3 bearing retainer at-taching screws and remove the bear-ing retainer and turn indicator switchand wires from the steering column.Disconnect the heavy cord from theswitch wires.

INSTALLATION1. Tape the ends of the switch

wires together and attach the cordto the wires.

2. Pull the wires down throughthe steering column with the cord,and position the switch to the steer-ing column hub.

3. Install the bearing retainer andattaching screws.

4. Install the turn indicator switchlever.

5. Press the switch wires into theconnector blocks in their correct lo-cation recorded during removal. Plugthe connector blocks together withthe mating connector blocks at thedash panel.

6. Install the steering wheel on theshaft.

7. Install the steering wheel re-taining nut and hub.

8. Connect the battery groundcable and check the operation of theturn signal switch and horns.

TURN INDICATOR FLASHERDisconnect the wires from the

CHARGE INDICATORGAUGE-COMET

1. Disconnect the battery.2.. Disconnect the speedometer ca-

ble.3. Remove the screws retaining

the cluster assembly to the instru-ment panel and position it outward.

4. Disconnect the bulbs, tempera-ture gauge, fuel gauge, constant volt-age regulator, and charge indicatorand remove the assembly to a bench.

S. Remove the screws retainingthe back cover of the cluster to thefront of the cluster. There is no clockin this cluster. The light for the oilpressure indicator is in the charge in-dicator gauge.

6. Remove the nuts retaining thecharge indicator gauge.

7. Position the new gauge and in-stall the retaining nuts.

8. Position the rear cover to thefront of the cluster and install the re-taining screws. The rear cover re-tains all the gauges and the speedom-eter head.

9. Position the cluster assemblyand connect all leads and bulbs.

10. Install the cluster assemblyto the instrument panel and secure itwith screws.

11. Connect the speedometer ca-ble.

12.. Connect the battery and checkthe operation of all disconnectedparts.

ELECTRIC CLOCK-FAIRLANE1. Disconnect the battery ground

cable.2.. Remove the clock setting knob.3. Remove the clock push-on con-

nector.4. Remove the clock screws and

the clock from under the instrumentpanel. Handle the clock with care, asthe clock hands are not protected.

s. Position the clock from the un-derside of the instrument panel andinstall the retaining screws.

6. Push on the clock wire connec-tor.

7. Install the clock setting knob.8. Connect the battery ~round ca-

SPEEDOMETER-FAIRLANE1. Disconnect the battery ground

cable.2. Remove the radio knobs,

mounting nuts, and radio.3. Disconnect the speedometer ca-

ble.4. Remove the screws retaining

the cluster assembly to the instru-ment panel. Position the cluster as-sembly outward.

5. Disconnect the bulbs, constantvoltage regulator and its groundwire, the clock and the fuel gauge.

6. Remove the cluster assembly toa bench.

7. Remove the clock knob and thescrews retaining the rear cluster cov-er. The cover retains the speedome-ter, clock, fuel gauge, the bulbs forthe alternator charge indicator, oilpressure, and the hot and cold en-gine temperature indicators.

8. Remove the screws retainingthe speedometer head to the coverand the four rubber insulators. Re-move the speedometer head.

9. Position the speedometer andinstall the retaining screws at therear. Install the four rubber insula-tors.

10. Position the rear cover assem-bly to the front of the cluster. In-stall the retaining screws. Install theclock knob.

11. Position the cluster assembly.Connect all leads and bulbs.

12. Position the cluster assemblyto the instrument panel. Install theretaining screws.

13. Position the radio to the clus-ter and install the mounting nuts andknobs.

14. Connect the speedometer ca-ble.

15. Connect the battery ground ca-ble and check the operation of thedisconnected parts.

SPEEDOMETER-COMET1. Disconnect the battery ground

cable.2. Disconnect the speedometer ca-

Page 19: Group 15 Lighting, Horns and Instruments

15-19PART 1 5 -4 -INSTRUMENTS

the retainer clip through the gearslots.

~

~,,

SWITCH AND FLASHERLOCA TION AND MOUNTING

I (TYPICAL), .:-:::::::::=:::::::::::::::::::::::::::::::::::::."

,I

II

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.../ ~~~-ij, /Q,;~~~.:;;o---, ---, "'--:.~- '

STEERING COLUMNTO FRONT OF

V"Hlrl"

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~:::E:::::::::::::::::~~~~~~~~~~~~~~~.

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K1578.B

WINDSHIELD WIPER SWITCH-FAIRLANE

1. Disconnect the battery groundcable.

2. Remove both control knobsand disconnect the washer.

3. From the lower edge of thecluster remove the retaining screwsfrom the switches. Disconnect theelectrical leads and remove the switchassembly from the instrument panel.

4. Remove a screw and separatethe wiper and washer switches fromeach other including the plastic barbetween the switches.

5. Assemble the wiper and wash-er switches to each other includingthe plastic bar so that when thewasher switch is turned on the wip-ers will start.

6. Connect the electrical leads tothe assembly and install it to the in-strument panel.

7. Install the control knobs andconnect the wiper washer.

8. Connect the battery ground ca-ble.

~ ~15583- EMERGENCY WARNING-WIRING,

SWITCH AND FLASHER ASSEMBL YFIG. 6-Emergency Warning Flasher ~

ble. assembly and remove the back plate3. Remove the screws retaining assembly.

the cluster assembly to the instru- 5. Remove the two screws retain-ment panel. Position the cluster as- ing the speedometer, the two screwssembly outward. retaining the speedometer dial to the

4. Disconnect the bulbs, and wir- back plate, and remove the speedom-ing from the temperature gauge, eter assembly.fuel gauge, constant voltage regula- 6. Position the speedometer andtor and charge indicator. Remove the install the two speedometer dial re-assembly to a bench. taining screws and the two speedom-

5. Remove the screws from the eter retaining screws.cover retaining the back portion of 7. Position the back plate assem-the cluster assembly and separate it bly and install the six retainingfrom the front portion. screws.

6. Remove the screws retaining 8. Install the instrument cluster as-the speedometer and remove the sembly to the instrument panel.speedom~t~r head. 9. Connect the speedometer cable,

7. Position the new speedometer avoiding sharp bends.head and. i?stall the retaining screws. 10. Connect the battery ground

8. Position the back cover of the blcluster to the forward portion and ca e.

install the retaining screws. The backcover houses all of the gauges andthe speedometer head.

9. Connect all wire leads andbulbs in the cluster assembly.

10. Position the cluster assemblyto the instrument panel and installthe retaining screws.

11. Connect the speedometer ca-ble.

12. Connect the battery ground ca-ble and check the operation of alldisconnected parts.

SPEEDOMETER CABLETo replace the speedometer drive

cable, disconnect the cable housingfrom the speedometer, and pull thecable out of the housing. Wipe offall of the old lubricant. Lubricatethe new cable with cable lubricantB5A-19581-A (do not over lubri-cate), insert it all the way into thehousing, and twist it slightly to makesure that the squared drive isengaged in the speedometer drivengear. If a speedometer cable is bro-ken, it wiD be necessary to disconnectboth ends of the cable housing inorder to remove the broken sections.Tighten the mounting bolt to 3-41/2foot-pounds torque (Fig. 7).

The speedometer driven gear isheld on to the speedometer cablehousing by a retainer clip. When re-placing the driven gear, make cer-tain that the gear is secure by placingthe gear in position before inserting

SPEEDOMETER-FALCON,MUSTANG

1. Disconnect the battery groundcable.

2. Disconnect the speedometercable.

3. Remove the instrument clusterassembly.

4. Remove the six screws retain-ing the instrument cluster back plate

WINDSHIELD WIPER MOTOR-EXCEPT FAIRLANE

1. Disconnect the harness connec-tor from the wiper motor.

2. Remove the three bolts retain-ing the wiper motor and mountingbracket assembly to the dash panel.Lower the assembly and disconnectthe wiper links at the motor. Removethe motor and bracket assembly.

3. Transfer the mounting bracketwith grommets to the new motor.

4. Position the motor and bracketassembly and connect the wiper linksto the motor.

S. Position the motor and bracketassembly to the dash panel and in-stall the three retaining bolts.

6. Connect the harness connectorto the wiper motor.

7. Connect the battery and checkthe operation of the wiper motor andthe park position of the wiper blades.

WINDSHIELD WIPER MOTOR-FAIRLANE

1. Disconnect the wiper links drivearm from the wiper motor drive shaft(under the instrument panel).

2. Disconnect the wiring leadsfrom the motor.

3. Remove the wiper motormounting bolts and remove the mo-tor.

4. Apply sealer around the edge ofthe new motor mounting bracket and

Page 20: Group 15 Lighting, Horns and Instruments

1 5-20 GROUP lS LIGHTING SYSTEM, HORNS AND INSTRUMENTS

'--

) \

/

K 1629-A

7. Check the operation of the wip-er and adjust the park position ifnecessary.

WIPER PIVOT SHAFT ANDLINK

1. Remove the windshield wiperblade and arm assembly.

2. Remove the pivot shaft retain-ing nut, bezel and gasket.

3. Disconnect the wiper link fromthe motor and remove the link andpivot shaft assembly.

4. Position the link and pivot shaftassembly on the cowl and wiper mo-tor. Connect the link to the motor.

5. Install the pivot shaft to thecowl and install the gasket, bezel,and retaining nut.

6. Install the wiper blade and armassembly.

7. Check the pivot shaft and linkoperation.

FIG. 7-Speedometer Driven Gear

around each bracket bolt hole. Posi-tion the motor to the dash and installthe mounting bolts.

5. Attach the wiring leads to the

MAJOR REPAIR OPERATIONS

DISASSEMBLY-PERMANENTMAGNET TYPE SINGLE ORTWO-SPEED ELECTRICWIPER MOTOR

1. Remove the gear cover retain-ing screws, ground terminal and cov-er (Fig. 8).

1. Remove the geai" and pinion re-

tainer.3. Remove the idler gear and pin-

ion and thrust washer.4. Remove the motor through

SPRING WASHERSPACER WASHER0 RING

/ OUTPUT ARM

~

""~::o~tf.~~~~g;=:::~i:!::: 1>

GEAR HOUSING(

ARMATURE SHAFTEND PLAY SPRING

PARKING SWITCH LEVER

..,.,. -PARK SWITCH TO, ~""..'~ --' ~" ,

PARK SWITCH '-,,~ADJUSTING SCREW (y/ OUTPUT GEAR AND SHAFT

\""", :::~:::::_~' (3) BRUSH PLATEAND SWITCH

~ ASSEMBLYFOR TWO SPEEDMOTOR

,'t» ',

PARKING SWITCHLEVER WASHER

e, "",""'{ ltJ'\J

IDLER GEAR -::i::;AND PINION i'

.(2) BRUSH PLATE

AND SWITCH

ASSEMBLYFOR SINGLE SPEED

MOTOR

GEAR AND PINION RETAINER

ARMATURE

GROUNDTERMINAL

MOTOR HOUSING ANDMAGNET ASSEMBLY

K 1632 - A

FIG. 8-Disassembled Single or Two-Speed Wiper Motor-Permanent MagnetType

Retainer and Mounting

motor.6. Position the wiper links drive

arm on the motor driveshafi and in-stall the mounting nut.

GEARCOVER

, '

",."~ r'

,.

Page 21: Group 15 Lighting, Horns and Instruments

PART 15-4 INSTRUMENTS 15-21

7. Apply Sun Prestige grease tothe ball bearing in the end of thearmature shaft. Position the arma-ture shaft in the gear housing andremove the brush retracting wires.

8. Holding the armature in posi-tion, install the terminal insulatingsleeve, motor housing and magnetassembly, and through bolts. Seal thearea where the terminal insulatorsleeve seats against the motor andgear housings.

9. Apply Sun Prestige grease tothe worm gear and idler gear, andinstall the idler gear, thrust washerand retainer.

10. Apply a generous amount ofSun Prestige grease to the areaaround the end of the armatureshaft. Install the gear housing coverand ground terminal.

WINDSHIELD WIPER MOTORPARK SWITCH TEST ANDADJUSTMENT-SINGLE ANDTWO-SPEED PERMANENTMAGNET TYPE

With jumper wires connected asshown in Fig 9, the motor shouldmove to the park position. If it does,the motor is all right and the faultlies in the panel switch or wiring. Ifthe motor does not park, proceedwith the following park switch ad-

justment (Figs. 8 and 10).Remove the motor thru bolts and

remove the motor cup and armature.Rotate the output shaft until the

park switch lower contacts are firm-ly closed as shown.

Rotate the adjusting screw clock-wise until the park switch lower con-tacts just open.

Rotate the adjusting screw coun-terclockwise one full turn.

Check the bridge to assure thatthe legs are contacting the brushplate when the lower contacts areclosed.

Install the armature, motor cupand thru bolts.

DISASSEMBLY-OSCILLATINGTYPE TWO-SPEED ELECTRICWIPER MOTOR

The two-speed electric motor maybe disassembled for service of thedrive mechanism parts.

1. Remove the gear housing coverplate and gasket (Fig. 11).

2. Remove the output shaft re-tainer and spacer washer.

3. Remove the crankpin bearingretainer and remove the spacer wash-er and cam return spring assembly.

4. Remove the arm and link as-sembly.

bolts, motor housing, switch terminalinsulator sleeve, and armature. Donot pound the motor housing magnetassembly as the ceramic magnetsmay be damaged.

5. Mark the position of the outputarm with respect to the output shaft,for assembly. Remove the outputarm retaining nut, output arm, springwasher, flat washer, output gear-shaft assembly, thrust washer, andparking switch lever and parkingswitch lever washer.

6. Remove the brushes and brushsprings.

7. Remove the brush plate andswitch assembly, and remove theswitch contact to parking lever pinfrom the gear housing.

PARTS REPAIR ORREPLACEMENT

All parts on both the single-speedand two-speed wiper are replacedand not repaired.

ASSEMBLY-PERMANENTMAGNET TYPE SINGLEOR TWO-SPEED ELECTRICWIPER MOTOR

1. Install the parking switch leverwasher.

2. Install the parking switch leveron the gear aQd pinion shaft with thecam rider pointing toward the gearhousing output shaft hole. Make cer-tain that the lever bottoms againstthe casting.

3. Apply a film of Sun Prestigegrease to the output gear teeth andshaft bearing surface. Insert the shaftin the bearing. Make certain thatthe parking switch lever is clear ofthe cam and gear assembly.

4. Place the spacer washer andspring washer on the shaft, positionthe output arm on the shaft in themarked position from which it wasremoved, and install the mountingnut.

5. Position the brush springs andbrushes in the holders and wrap wirearound them to hold them in thefully retracted position. Push the in-sulated brush connector onto theswitch terminal.

6. Place the switch-contact toparking-lever pin in the gear hous-ing. Position the brush plate assem-bly to the housing and install themounting screws.

Make the park switch contactpoints adjustment covered underWindshield Wiper Motor Park SwitchTest and Adjustment-Single andTwo-Speed Permanent Magnet Typein this section.

K 1630 A

FIG. 9-Windshield Wiper Motor Park Switch Test-Single-Speed

Page 22: Group 15 Lighting, Horns and Instruments

PARTS REPAIR ORREPLACEMENT

All parts on both the single-speedand the two-speed electric wipersare replaced and not repaired.

~

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BRIDGELEGS

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i~!,

ASSEMBLY-OSCILLATINGTYPE TWO-SPEED ELECTRICWIPER MOTOR

1. Tighten the motor cover. Ad-just the motor shaft end play to0.000-0.005 inch by turning the shaftstop screw. Measure with a feelergauge between the stop screw andthe motor shaft.

2. Install the input gear shim onthe input gear shaft and install thegear in the housing. Adjust the endplay to 0.005 to 0.010 inch by add-ing or removing shims under the in-put gear retainer. Install the retain-er.

/LOWER.CONTACTS :

7,

"~- OUTPUT SHAFT

~K1631-A

FIG. 1 a-Windshield Wiper Motor Park Switch Adjustment

~V. -- GEAR H~~""""'~-..

I'. , ,

OUTPUT SHAFT j \, l", ..

01 ITPI JT GFAR

~

GEARHOUSING COVER

SHIMS\I...

,~GASKET

\19

" --'0 c

,.."B

--.,: RING "" '_~6

GEAR SHIM 'J -- Y@~INPUT GEAR I r

CRANK PIN ~,i RETAINER!BEARING CAM -

J "" CAM RETURN ""'~

J SPRING ASSEMBLY.

TO OPERATE AT LOW SPEEDRed AND Yellow TO VOLTAGE SOURCE

,..J Blue TO White Block TO GROUNDR At-in r TFRMlt-IAI'<: t-In rnt-it-lFrTlnN

3. Install the output gear on theoutput shaft. Make sure that the gearis bottomed on the shaft.

4. Install the output shaft and gearassembly into the housing with thegear teeth facing the motor. Installone spacer washer to the outside endof the output shaft and assemble thewiper arm lever to the output shaft,with the linkage studs facing awayfrom and above the shaft. Secure thelever with a lock washer and nut.

5. Place the bearing cam on thecrankpin with the small diameterportion of the cam facing outward.

6. Install the arm and link assem-bly to the bearing cam. As the armis placed on the shaft, the gears mustbe meshed and the link which is riv-eted to the arm must be installed tothe output shaft at the same time.Proper gear indexing is obtainedwhen the bottom tooth of the armand gear segment will be in meshwith the bottom valley of the outputshaft gear.

7. Install the output shaft spacerwasher and retainer. Check the endplay of the output shaft (0.005-0.010inch). Remove or install spacerwashers under the shaft retainer toadjust the end play.

8. Install the cam return springassembly.

9. Install the bearing spacer andretainer. If the retainer cannot be in-stalled, one or more coils of thespring clutch are probably out ofplace. If the bearing has excessiveend play on the crankpin, the pro-jection of the bearing may ride outof the semi-circular slot in the endplate. Add spacer washers under theretainer if necessary.

JRING GEAR ~ \

RETAINER ~\

MOTOR SHAFTSTOP SCREW

WORM --~.,

TESTING CONNECTIONSTO PARK

B TERMINAL TO VOLTAGE SOURCEC TERMINAL TO Blue AND Red

Yellow TO White Black TO GRnIINr""'.I

TO OPERATE AT HIGH SPEEDYellow TO VOLTAGE SOURCEBlue TO White Black TO GROUNr-BAND C TERMINALS - JAND Red NO CONNECTION K1090-D

FIG. 11-Two-Speed Wiper Motor-Oscillating Type

S. Remove the crankpin bearing and spacer, and remove the outputcam. shaft and gear assembly from the

6. Remove the input gear retainer housing.and outer spacer shim, and remove 9. The output gear may be re-the input gear and inner spacer moved from its shaft by tapping withshim. a fiber hammer. Be careful not to

7. Remove the wiper arm lever damage the end of the shaft.nut and lock washer. The worm drive gear and armature

8. Remove the wiper arm lever assembly is not serviced.

RET~INER

-~PACER WASHER

Page 23: Group 15 Lighting, Horns and Instruments

10. Apply generous amounts ofSun Prestige grease to all movingparts. Install the gear housing coverplate.

When operating the unit on thebench, do not place hands or fingersbetween the wiper lever and the case,or inside the gear housing, as con-siderable power is developed by thegear reduction.

3. Bent cable core at attachingnut.

4. Kinked or pinched cable hous-ing.

5. Excessive grease in speedome-ter head.

6. Defective speed control regula-tor.

Inoperative1. Broken cable core.2. Defective drive and/ or driven

gear.3. Defective speedometer head.

AUDmLE DEFECTS

Clicking or Ticking (WithNeedle Waver), Grindingor Ringing1. Loose cable nut.2. Defective drive and/ or driven

gear.3. Defective speedometer head.4. No lube on cable.

ELECTRO-PNEUMA TIC

GOVERNOR AND CONTROLSELECTOR SWITCH-COMET

The electro-pneumatic governorand the control selector switch areserviced as assemblies only. Shouldany internal component become de-fective the complete assembly mustbe replaced.

In the event of suspected partialor total blockage of internal pas-sages, light air pressure may be ap-plied in an attempt to remove thecause of blockage.

Although the vacuum hoses are anintegral part of the wiring harnessassembly, individual hoses may be re-placed if required.

SPEEDOMETER DIAGNOSTICPROCEDURES

Speedometer system complaints aregenerally the result of a visible oraudible defect in the system. It is im-perative that the specific defect bedetermined prior to attempting anyphysical repairs to preclude unnec-essarily disassembling system compo-nents. The following suggestions areintended to aid in quick and accurate

system problem diagnosis.

SPEEDOMETER REPAIRPROCEDURESLOOSE CABLE ATTACHINGNUTS

1. Cable nuts should be tightenedwith pliers to approximately 18 to 25in-lbs.

2. Cable nuts should start and runup freely by hand for at least threeto four turns.

3. A loose cable nut can cause abent cable core. Tightening will notalways correct the problem.

DEFECtIVE SPEEDOMETERHEAD

Before removing a speedometerhead, disconnect the cable at thehead and insert a short section of ca-ble core in the head. Rotate the sec-tion of core to check for any drag-ging or noise. The speedometer shaftshould turn freely and evenly.

DEFECTIVE CABLE COREAND HOUSING

1. To check for a kinked cablecore remove and wipe dry. Lay thecore out straight on a flat surfaceand roll it back and forth. Any kinksor damage will be seen. Then takean end in each hand, allowing coreto hang in approximately a 9-inchloop. Rotate both ends to be surecore turns evenly.

2. Routing of the cable housing isparticularly important where the ca-ble leaves the speedometer head. Theoptimum routing would provide thatthe cable and housing take virtuallyno change of direction for at leasta length of 8 inches from the speed-ometer head.

3. When installing a new cableand housing it is necessary that thenew assembly be guided and routedproperly to eliminate any kinks.

4. Proper lubrication of the cablecore is accomplished by a light ap-plication of B5A-19581-A lubricantafter the cable has been wiped clean.A light film is all that is required.

DEFECTIVE DRIVE ANDDRIVEN GEARS

1. A score nicked or gouged driv-en gear is usually indicative of a de-fective drive gear on those vehiclesthat have the drive gear integralwith the transmission output shaft.The output shaft should be carefullyinspected for imperfections and re-placed if necessary.

2. A driven gear with two orthree adjoining teeth badly scored is

indicative of improper assembly pro-cedure. The gear should be insertedin the transmission while simultane-ously turning the drive shaft. Thiswill insure initial gear engagementand prevent gear damage. Forceshould never be used.

3. Whenever a drive gear is re-placed, a new driven gear should al-so be installed, regardless of its ap-parent condition.

VISmLE DEFECTS

Slight Needle Waver orSevere Needle Fluctuation(No Noise)1. Loose cable nut.2. Defective speedometer head.

Page 24: Group 15 Lighting, Horns and Instruments

15-24

SPECIFICA liONS

BULB CHART

Fog-Light (Mustang)Front Turn Signal/Parkin"

, Rear Turn Signal and StoP/Tail

I Engine Compartment (Comet)I Dome Lipht

J Illumination

<DCandela is the new international term for candlepower

Page 25: Group 15 Lighting, Horns and Instruments

PART 15-5 SPECIFICATIONS 1 5-25

CIRCUIT PROTECTION

FalconComet

RATING TYPE

7112 SFE15 C.B.

FairlaneRATING TYPE

MustangI RATING TYPEFUNCTION LOCATION

I Dome Courtesy-Map CargoI, Tail-Park Lice~se. - -Fuse P"aiieILight SwiLight SwitchFuse PanelFuse Panel

71/2 SFEI 15 -C:B:

I 7112 SFEI 15 C.B.I 15 C.B.

7112 SFE

14 SFE

15 C.B.7¥2 SFE

15 C.B.

71/2 SFE

14 SFE

I Stop light !~ Clock ~

T4""SFEI Back-upI Turn Signals (act as a circuit breaker)

14SFE~T4""SFE

T4""SFET4""SFET4""SFE

mFE

Fuse Panel (Acc. Socket)Fuse Panel T4"""SFEFuse Panel Heater Socket

I Radio

Fuse Panel 14 SFE20 SFE

7¥2 SFE

14 SFE20 SFE I 20 SFE

I 71f2 SFE\ TachometerI Convertible Top

7¥2 SFE~

link20 C.B.20 SFE

Safetylink

20 C.B.

SafetY"Link

I Power Window-Power s-e"it

Fuse Panel -{Dome Socket!Between starter relay &Junction BlockOn Starter RelayClips to overdrive relayFusePanelAcc.Socket

I 20C.B.I 20SFEI Overdrive

I Seat Belt WarningWindshield Washer

(Two speed wiper)Windshield Washer

(SinRle speed wiper)

20m14 SFE14 SFE

14SFE

T4""SFE14 SFE

14SFE

T4"""SFE

I 14 SFE

12 C.B.

5 (S. Sp.J C.B. ,12 (2 Sp.J C.B.

Wiper Switch

6 (S. Sp,) C.B.7 (2 Sp,) C.B.(Falcon)7 Intermittent21fz AGA21fz AGA21fz AGA21fz AGA21fz AGA21fz AGA

6 (S. Sp.) C.B.7 (2 Sp.J C.B.

Windshield Washer(Two speed wiper)

Windshield Wiper Wiper Switch

2¥2 AGA2¥2 AGA21/2 AGA21/2 AGA2¥2 AGA

Light-Instrument PanelLight-Instrument ClusterLight-ClockLight-TachometerLight-Ash ReceptacleLight-PRNDL Dial

21f2 AGA21f2 AGA21f2 AGA21/2 AGA21f2 AGA21f2 AGA

Fuse PanelInstrumentLP SocketConnected into15 C.B.Light SwitchFuse Panel Acc. SocketFuse PanelFuse PanelFuse Panel.In LineLight Switch

14SFE7¥2 SFE

~~ ,s~~- I71/2 SFE~Luggage Compartment

I Light-Door Open Warning-7 TJ;m

71/2 SFE

7¥-;;;t~7¥2 SFE

I Uf1ht-PRNDl Dial (Console Only)

7¥2 SFEI 7¥2 SFr-

light-Headlights 18 CometC:B:r12 Falcon C.B!

Fuse Panelli~ht Switch

14SFE15 C.B.25 C.B.20 C.B.15 AGCC.B.C.B.C.B.C.B.

I 14SFEI 15 C.B.

14Sff15c:B:""25-c:B:-

I Emergency Warning Flasher~ Horns

Air Conditioner (Integrated)Back Light Control

On Ign. SwitchAt Starter RelayIn lineCircuitBreakerIntegralWithMotor

25c:B:-2Off15AGCC.B.

C.B.

C.B.

C.B.

15 AGCC.B.C.B.C.B.C.B.

I Economy Air ConditionerMotor Windshield WiperMotor Convertible TopMotor Power Window

I Motor Power Seat

SPEEDOMETER CABLE

Mounting Clip bolt Torque 3-41/2 ft. Ibs.

tch

7112 SFE

71/2 SFE