Component LocationsComponents in the operator Station Tractor Mounted Components

IDENT Component Schematic Location IDENT Component Schematic

Location1 ALARM - LOW BRAKE OIL PRESSURE F-3 66 AUX. START RECEPTACLE A-6

2 ALARM - PARK BRAKE WARNING F-2 67 BATTERI ES A-5

3 BREAKER - AIR CONDITIONER D-4 68 HORN - HIGH TONE B-1

4 BREAKER - ALTERNATOR D-4 69 HORN - LOW TONE B-1

5 BREAKER - HEADLAMP D-4 70 LAMP - CAB B-7

6 BREAKER - KEY E-4 71 LAMP - HIGH BEAM HEAD - RIGHT B-1

7 BREAKER - RUNNING LAMPS E-4 72 LAMP - HIGH BEAM HEAD - LEFT C-1

8 DIODE BLOCK F-2 73 LAMP - LOW BEAM HEAD - RIGHT B-1

9 FLASHER D-2 74 LAMP - LOW BEAM HEAD - LEFT C-1

10 FUSE - BACK UP ALARM E-5 75 LAMP - TURN/PARK - RIGHT - FRONT B-1

11 FUSE - BODY HOIST CONTROL E-5 76 LAMP - TURN/PARK LEFT - FRONT C-1

12 FUSE - CAB LAMP D-5 77 MOTOR - FRONT WASHER E-12

13 FUSE - DIFF. LOCK D-5 78 SOLENOID - BODY RAISE E-10

14 FUSE - HORN E-5 79 SOLENOID - BODY LOWER D-10

15 FUSE - GAUGES D-5 80 SOLENOID - PARK BRAKE C-2

16 FUSE - INDICATORS D-5 81 SOLENOID - RETARDER B-4

17 FUSE - PARK BRAKE D-5 82 SOLE NIOD - START AID C-2

18 FUSE - RETARDER E-5 83 SWITCH - BRAKE OIL PRESSURE A-9

19 FUSE - START AID D-5 84 SWITCH - DISCONNECT A-5

20 FUSE - WASH/WIPE - FRONT E-5 85 SWITCH - FUEL LEVEL A-2

21 GAUGE - CONVERTER TEMPERATURE E-6 86 SWITCH - REFRIGERANT B-2

22 INDICATOR - ALTERNATOR CHARGE F-4 87 SWITCH - STOP LAMP D-3

23 INDICATOR - BRAKE OIL PRESSURE F-5 88 SWITCH - STEERING PRESSURE B-3

24 INDICATOR - CONVERTER LOCK F-6 Engine and Transmission Mounted Components

25 INDICATOR - COOLANT TEMPERATURE F-5 IDENT Component Schematic Location

26 INDICATOR - DIFF. LOCK F-5 89 ALTERNATOR A-2

27 INDICATOR - ENGINE OIL PRESSURE F-5 90 MOTOR - STARTER A-6

28 INDICATOR - HIGH BEAM F-5 91 PICK-UP - SPEEDOMETER E-11

29 INDICATOR - LEFT TURN F-6 92 PICK-UP - TACHOMETER A-3

30 INDICATOR - LOW FUEL F-6 93 SENDER - CONVERTER TEMP. C-11

31 INDICATOR - PARK BRAKE F-6 94 SOLENOID - AIR CONDTNR CLUTCH B-3

32 INDICATOR - RETARDER F-4 95 SOLENOID - DIFF. LOCK B-7

33 INDICATOR - RIGHT TURN F-4 96 SOLENOID - ENGINE SHUTDOWN A-2

34 INDICATOR - STEERING PRESSURE F-6 97 SWITCH - CONVERTER TEMPERATURE F-11

35 INDICATOR - TRANSMISSION OIL TEMP F-4 98 SWITCH - COOLANT TEMPERATURE A-4

36 LAMP - DOME C-7 99 SWITCH - COOLANT TEMPERATURE (ETHER INHIBIT) A-4

37 METER - SPEEDO. E-4 100 SWITCH - ENGINE OIL PRESSURE A-3

38 METER - SERVICE HOUR E-5 101 SWITCH - LOCK UP PRESSURE B-5

39 METER - TACHO E-5 102 SWITCH - RETARDER INHIBIT B-5

40 MOTOR - BLOWER C-4 Trailer Mounted Components

41 MOTOR - FRONT WIPER C-7 IDENT Component Schematic Location

42 RELAY - ALTERNATOR CHARGE F-1 103 ALARM-BACKUP A-12

43 RELAY - MAIN POWER D-4 104 LAMPS-BACKUP A-12

44 RELAY - PARK BRAKE E-7 105 LAMP-STOP/TAIL/TURN-RIGHT A-12

45 RELAY - START D-8 106 LAMP - STOP/TAIL/TURN - LEFT B-12

46 RESISTOR - AIR CONDTNR/HEATER D-5

47 SWITCH - BACK-UP ALARM C-9

48 SWITCH - BLOWER C-5

49 SWITCH - BODY HOIST CONTROL D-8

50 SWITCH - BODY HOIST D-8

51 SWITCH - CAB LAMP F-7

52 SWITCH - DIFF. LOCK B-8

53 SWITCH - DIMMER D-2

54 SWITCH - DOME LAMP C-7

55 SWITCH - FRONT WIPER E-8

56 SWITCH - HORN F-8

57 SWITCH - KEY START E-2

58 SWITCH - NEUTRAL START C-9

59 SWITCH - PARK BRAKE - PRESSURE C-2

60 SWITCH - PARK BRAKE E-8

61 SWITCH - RETARDER CONTROL F-10

62 SWITCH - RUNNING LAMP F-8

63 SWITCH - START AID E-3

64 SWITCH - TURN SIGNAL E-2

65 THERMOSTAT C-4

Wire DescriptionWire

NumberWire Color Description Wire

NumberWire Color Description

Power Circuits Monitoring Circuits

101 RD BATTERY 400 GN SERVICE HOUR METER (-)

102 BU HEAD LAMP BREAKER TO SW. 403 GN ALTERNATOR (R) TERMINAL

103 YL DOME/DASH/PARK/TAIL LAMP 405 GY ENGINE OIL PRESS.

105 BR BREAKER TO KEY SWITCH 406 PU ENGINE COOLANT TEMP. INDICATOR

107 WH ENGINE SHUTDOWN CONTROL 407 PK TRANSMISSION TEMP. INDICATOR

109 OR ALTERNATOR OUTPUT (+) TERM. 419 YL PARK BRAKE INDICATOR

112 PU MAIN POWER RELAY OUTPUT 432 PK BRAKE OIL PRESSURE INDICATOR

118 GY FRONT WIPER FUSE TO SW. 443 YL CONVERTER TEMP. GAUGE

121 YL FUSE TO BACK UP ALARM SW. 449 BU SPEEDO. PICK-UP

123 WH FUSE TO GAUGES 450 YL TACHOMETER PICK-UP

124 GN HEATER/AIR CONDITIONER SW. 454 GN RETARDER INDICATOR

130 GNFUSE TO INDICATORS, LOW BRAKE OIL PRESSURE HORN AND WARNING HORN (FORWARD)

469 GN FUEL LEVEL SWITCH

158 BR DIFF. LOCK FUSE TO SW. 477 YL SPEEDO. PICK-UP

160 PU BODY HOIST FUSE TO SOLENOIDS 484 YL STEERING PRESSURE INDICATOR

165 YL FUSE TO START AID SW. 490 GN TORQUE CON.LOCK UP INDICATOR

173 YL FUSE TO CAB LAMP AND STOP LAMP SWITCHES

B404 YL ALTERNATOR INDICATOR

190 PK FUSE TO PARK BRAKE SW. Accessory Circuits

199 OR FUSE TO RETARDER SW. 500 BR WIPER - FRONT (PARK)

Ground Circuits 501 GN WIPER - FRONT (LOW)

200 BK MAIN CHASSIS 502 OR WIPER - FRONT (HIGH)

200 BK BODY HOIST CONTROL GROUND 506 PU WASHER - FRONT

Basic Machine Circuits 513 OR AIR CONDITIONER COMPRESSOR TO REFRIGERANT SW.

301 BU STARTER SOL. TO RESISTOR 515 GY BLOWER MOTOR (HIGH)

304 WH STARTER RELAY TO NO.1 OUTPUT 516 GN BLOWER MOTOR (MEDIUM)

306 GN START RELAY TO NEUTRAL START SW. 517 BU BLOWER MOTOR (LOW)

307 OR KEY START SW. TO NEUTRAL START SW. 521 YL AIR CONDITIONER SW. TO REFRIGERANT SW.

308 YL MAIN POWER RELAY COIL 522 WH AIR CONDITIONER COMPRESSOR TO THERMOSTAT SW.

310 PU START AID SW. TO START AID SOL. 537 GN TURN SIGNAL SW TO FLASHER

311 WH START AID SOL. TO TEMP SW. 539 BU TURN SIGNAL INDICATOR - RIGHT

321 BR BACK UP ALARM/LAMP 540 WH TURN SIGNAL INDICATOR - LEFT

322 GY SW. TO WARNING HORN (FORWARD) 572 PU RETARDER INHIBIT SW. TO SOL.

324 BU DIFF. LOCK SW. TO INDICATOR/SOL. Lighting Circuits

326 PU KEY SWITCH "C" TERMINAL 602 WH DOME LAMP

370 BU DIODE BLOCK TO LOW BRAKE OIL PRESSURE HORN

604 OR STOP LAMP SW. TO STOP LAMP

371 OR DIODE BLOCK TO NEUTRAL START SW. AND PARK BRAKE WARNING HORN

605 YL TURN LAMP - LEFT

606 GY TURN LAMP - RIGHT

610 OR DIMMER SW. TO RUNNING LAMP SW.

611 PU HEAD LAMP HIGH INDICATOR

614 PU PARK/TAIL/GAUGE LAMP

619 GN HEAD LAMP - LOW

624 YL CAB LAMP

Control Circuits

706 BR TRANSMISSION RETARDER SW. TO RETARDER SOL.

A958 WH PARK BRAKE SOL.

B761 YL BODY RAISE SOL.

B762 GN BODY LOWER SOL.

T

Normally open switch that will close with an increase of a specific condition (temp-press-etc.).

Normally open switch that is closed due to an applied condition, and will open again with a specific decrease in that condition.

Normally closed switch that will open with an increase of a specific condition.

Normally closed switch that is open due to an applied condition, and will close again with a specific decrease in that condition.

The circle indicates that the component has screw terminals and a wire can be disconnected from it.

No circle indicates that the wire cannot be disconnected from the component.

This indicates that the component has a wire connected to it that is connected to ground.

This indicates that the component does not have a wire connected to ground. It is grounded by being fastened to the machine.

Electrical Schematic Symbols And Definitions

PressureSymbol

TemperatureSymbol

LevelSymbol

FlowSymbol

A AA

2

A AA1

2

325-PK-14C A

325-PK-14

200-BK-14

T

FUSE - A component in an electrical circuit that will open the circuit if too much current flows through it.

REED SWITCH - A switch whose contacts are controlled by a magnet. A magnet closes the contacts of a normally open reed switch; it opens the contacts of a normally closed reed switch.

SENDER - A component that is used with a temperature or pressure gauge. The sender measures the temperature or pressure. Its resistance changes to give an indication to the gauge of the temperature or pressure.

RELAY (Magnetic Switch) - A relay is an electrical component that is activated by electricity. It has a coil that makes an electromagnet when current flows through it. The electromagnet can open or close the switch part of the relay.

CIRCUIT BREAKER (C/B) - A component in an electrical circuit that will open the circuit if too much current flows through it. This does not destroy the circuit breaker and it can be reset to become part of the circuit again.

SOLENOID - A solenoid is an electrical component that is activated by electricity. It has a coil that makes an electromagnet when current flows through it. The electromagnet can open or close a valve or move a piece of metal that can do work.

Harness And Wire Electrical Schematic Symbols

SocketPin

Pin or Socket Number

Wire, Cable, or Harness Assembly Identification

Single Wire Connector

Circuit Number Identification

Wire Gauge

WireColor

Plug Receptacle

9X-1123

Component Part Number

Electrical Schematic Symbols And Definitions

11 12 2

Typical representation of a Sure-Seal connector. The plugand receptacle contain both pins and sockets.

Typical representation of a Deutsch connector. The plug contains all sockets and the receptacle contains all pins.

MAGNETIC LATCH SOLENOID - A magnetic latch solenoid is an electrical component that is activated by electricity and held latch by a permanent magnet. It has two coils (latch and unlatch)that make electromagnet when current flows through them. It also has an internal switch that places the latch coil circuit open at the time the coil latches.

SENR8232March 1993

D20D & D250D

Electrical System

6NG1-UP9MG1-UP

Articulated Trucks

©1993 CaterpillarAll Rights Reserved

Printed in U.S.A.

3

4 5

57

62

6

61

64

63

60

89

10

11

12

14

15 13

16

1

11

12

2

17

18

19 20

21 2223

24 2526

27

2829

30

3132 37 3533 34

38

7

39

43

45

47

48

49

50

51

52

53

58

55

56

Operators Station

59

6968

6968

67

66

65

78

79

81

83

88

87

86

82

84

70

79787472

77

80

86

82

85

103

105

104

104

106

36

36

72

76

74

77

70

75

7173

40

41

41

46

6540 46

54

54

Engine and Transmission - Right Side

Engine and Transmission - Left Side

89

94

97

93

95

91

9296

9099

98

100

102101

T

T

12

2 4 3 1

3 4 5 2 1

2 3 4 1

1

3

3 2 4

8 7 2 1 3 6 5

1 2 3

1 5 3 2 4 2 1 6 5

4 3 2

6

1

1

2

2

1 2 3

3 2 1

1

1

5 1 4 3 2

2 3 4 5 1

2

3 2 1

4

2 1

1 2

10 9

2 1

2 1

1 2

1

4 3

2 8 3 6 4

4

4 7 8 5 2 6 3 1 9

4

1

2 1

2

2 1

1

6

2 1

1 2

21

2 3 1 6 5 4

3

2 1

2

3 2 1

1

3 2 1

3

4 5 7

1 2

3

3 2

1 2 3

9

4 5

2

8

6 3

5

1

4 3

4 5

2

5

2 1

2 1

1

11 10

12 11 10

9 8 7

9 8 7

6 5 4 3 2 1

6 5 4 3 2 1

F

E

D

C

B

A

F

E

D

C

B

A

1 M B E F D L G C W S 4 2 J H R T P K N A 3 V

627-YL

KK

200-BK-14

484-YL

L48L48

L48 L48

L48 L48

L48

L48 L48

L49

L49 L49

L3

L3

NOTE G

443-YL

200-

BK

35 4

1

200-BK

507-WH

109-OR-10

SEE AREA G

BK

U U

U

158-

BR

F

200-BK-14

321-BR

200-BK419-YL

FF

B-5A-8A-8A-8

AREA GTILT CAB CONVERSION HARNESSES

A-7A-7

BK

304-WH-10(LOC D-7)

TT AC

C AS S

(LOC C-4)109-OR-6

101-RD-6(LOC D-5)

RR CA

U

A Q

611-PU-14

A958-WH614-PU706-BR490-GN

326-PU

605-YL

400-GN403-GN

310-PU

606-GY

469-GN450-YL477-YL449-BU

540-WH539-BU

V

405-GY406-PU407-PK

322-GY

(LOC E-1) Q B

443-YL

3 A N K P T R H J 2 4 S W C G L D F E B M 1

(LOC B-6) AP

D775-OR453-PK618-YL617-BRB762-GNB761-YL

200-BK-14324-BU321-BR419-YL521-YL-14522-WH-14619-GN-14604-OR U

LAMP2U-4806

G E F J H L K W V U T S R P N M 1 B A D 3 4 2 C

PD

C 2 4 3 D A B 1 M N P R S T U V W K L H J F E G

A

200-BK200-BK

322-

GY

322-

GY

322-GY

130-GN

SEE AREA G

L31

443-YL109-OR-10

SEE AREA G

453-PK

200-BK-14

490-GN

130-

GN

370-

BU

BB

BB

30

484-YL

B

310-PU

SEE AREA G

443-YL

TO AUXSTOP LAMPS SW

160-PU

D

610-

OR

-14

+-

EMSTESTSWITCHNOTE F

FAULT LAMPNOTE F

L28

L51 L51

L51 L51

L51

L51

L51 L51

L50

L50

L50

L49L49

CIRCUIT GROUPINGDESIGNATION

#L

ATCH WIRE, CABLE,COMPONENT

CIRCUIT NOT CONNECTED

CIRCUIT CONNECTED

BLUEGREEN

BUGN

RDWHORYLPKBK

BLADE, SPADE, RING,OR SCREW TERMINAL

INTERNAL ELECTRICALCONNECTION TO SURFACEOF COMPONENT

ELECTRICAL CONNECTIONTO VEHICLE STRUCTURE

CONNECTOR

SYMBOL DESCRIPTION

BROWNPURPLEGRAYBLACK

COLORABBREV

PINKYELLOWORANGE

D775-OR

D775-OR

L6449-BU477-YL

507-WH506-PU

507-WH

453-

PK

200-

BK

L49

L49

L49

L49

L39

L39 B762-GNB761-YL

B

505-

BU

504-

YL

503-

BR

WHITE

617-BR617-BR

618-YL617-BR

618-YL

505-BU

618-YL617-BR

B

617-BR

BB

NOTE G

A

200-BK

504-YL

618-YL

503-BR

110-

GN

ATCH

99

A-1/C-1

C-1

7

627-YL

627-YL

7 8

NOTE G: FOR USE ON VEHICLES WITH TUV OPTION ONLY

614-PU

614-PU

A

617-BR

L38

618-YL617-BR

618-YL617-BR

604-OR604-OR

173-YL

173-YL

D

A

D

00

200-BK

7U-6401FF

ATCH

A

627-

YL

L39

EE

200-

BK

3

200-BK

200-BK

ATCHATCHATCH

0000000001

105-9677103-5907103-5908

RED

BR

12

FF

104-4368103-5905

ATCH01103-5906

DD

U

NOTE D

A-11B-11

002U-9023002U-9024

M

TS

L

M

L

200-BK200-BK

L39

FF

H

E

E

E

E

200-BK

321-BR

RH STOP/TAIL/TURNLAMP2U-9213BULB7H-29763H-2691

605-YL604-OR614-PU

604-OR614-PU

200-BK

321-BR

321-BRBACK UPALARM3T-1815

200-BK

200-BK

200-BK

200-

BK

-14

321-

BR

604-

OR

604-

OR

606-GY

614-

PU

614-

PU

200-

BK

200-

BK

200-

BK

E

PUGY

E

CAB TOGROUNDSTRAP

N

110-GN

614-PU

614-PU

419-

YL

371-

OR

D77

5-O

R

112-PU

1 M B E F D L G C W S 4 2 J H R T P K N A 3

443-YL

L3

BR

L10

L6

L17

L17

BU

RD

L48

L48

L48

L48

L47

L47 L47

L47

L46

L46

L46

L46

L46

L45L45

L45L45

L45

L44

L44L44

L44

L44

L40L40

L40

L40

L40L40

200-

BK

200-

BK

L40

STEERINGPRESSURE SW8T-8640

200-BK

200-

BK

200-

BK

200-

BK

A

484-

YL

BK BK

RD-18

200-

BK

200-

BK

NOTE G

419-

YL

540-

WH

200-

BK

B B

A

A

B

507-WH

C

C-7

STEERINGPRESSUREINDICATOR7N-9967BASE2G-0151 B B

110-GN

432-

PK

370-BU

L43

371-OR

L43

L43

C

B

110-GN

110-

GN

C

112-PU

371-ORAUXSOUNDER2U-8863

130-GN

10A

L43

130-

GN

419-YL

L43

L42

L42 L42

L42 L42

L42 L42

RDRD

374-

PK

374-PK

PARK BRAKE SW102-9371

307-OR

PARK BRAKERELAY3T-2170

B B

B

374-PK

374-PK

B765-BR

B765-BR

B765-BR

B765-BR

B765-BR

B765-BR 190-PK

B

BB

B

ALARM9G-9813

DIODE BLOCK2U-4539

B

L4

L1

L1

L2

L2

L6

L7 L5

L7

L7

L12L12

L14L14

L13

L18

L18

L5

L5

L7

L18

L8

PK

L9

L9L9

L18

L1

L2

L6

L10

L17L15

L15

L31

L17

L17L7

L16

L6L13

L8

L18

L19

L19

L13

L14 L20

L9

L19

L19

L16

L25

L26

L24

L16

L31

L24

L24

L13

L20

L23

L23

L21

L1

L1

L22

L10

109-

OR

-6

L22

L13

L11L11

L22

L28

L28

L21

L21

L3

L3

L3

L26

L20 L20

L16 L16

L15

L15

L30

L31

L31

L25

L25

L24

L24

L24

L24

87A

87

86 85

L32

L15

L13

L20

L30

L30

L27

L27

GNGN

L21

L29L29

L27

BBBBBBBBBBBBBBB B

B

B

B

B

B

B

B

123-WH

B

B

B

X

X

X

X

X

X

X

C

C

X

L28

C

540-WH

322-GY

407-PK

7U-54187U-89837U-95027U-8984

00000001007U-5670

2U-89247U-7950

0100009Y-1267

A-5A-5A-5A-6A-6

D-4D-4A-2

C-5B-12

L29

C-7B-12B-11C-5D-8F-2E-1

00

0100

L27

00

0002010102

2U-8948

9X-47162U-7141

L27

2U-8107

2U-7143

BK-18BK-18

2U-84482U-80732U-83852U-7144

YLRDWHGN

YLRDWHGN

469-

GN

614-PU606-GY

450-YL469-GN539-BU540-WH

604-OR

322-

GY

403-

GN

326-

PU

400-

GN

405-

GY

406-

PU

A

A

L28

539-BU

L4

L30

B-9012U-9478

C

AA

A

A A

A

A

A

A

AA

A

A

A

DD

DDCCCCBBBBAA

AA

ZY

406-PU405-GY

E

NOTE D: D250D ONLY

NOTES

X

X

112-PU-14

112-PU-14

V

110-

GN

4

370-BU

C

507-WH

W109-OR-10

109-OR-10

109-OR-6CW

W

469-GN

C A

V

CA

K

A

A A

A-6

1

617-

BR

617-

BR

539-BU540-WH

618-

YL

618-

YL

449-BU477-YL450-YL469-GN

627-

YL

L38

200-

BK

L4

611-PU-14

619-

GN

-14

611-

PU

-143

619-

GN

-14

611-

PU

-14

619-GN-14619-GN-14521-YL-14

521-YL-14A

522-WH-14

00

2

9Y-1948Y

65

ALT

5

173-YL

200-BK

490-GN

706-BR

6

101-RD

112-PU112-PU-14

105-BR

606-GY

610-OR-14

4

513-OR-14

522-WH-14

614-PU614-PU

614-PU614-PU

200-BK200-BK

200-BK-14

8

605-YL

322-

GY

200-BK-14605-YL

A-6017U-9550EE

A

GROUND

C

BATTERYSOLENOID

A

477-YL449-BU

BK

200-

BK

-14

L4

443-YLCONVERTERTEMP SENDER6N-5926

310-PU

322-GY

322-GY

322-GY

13

406-

PU

407-

PK

407-

PK

2

200-

BK

65

L22L22

D

D

B40

4-Y

L

311-WH

611-PU-14

454-GN

321-

BR

E

E

507-WH

454-GN

454-

GN

405-GY

C

C

C

C

C

C

C

324-

BU

C

308-YL

103-YL-14

103-YL-14103-YL-14

C

103-YL-14103-YL-14

C

537-

GN

103-YL-14 537-GN

C

C

C

C

E

200-BK-14200-BK

OPERATOR STATION

200-BK-14

101-RD-6304-WH-10

484-

YL

200-

BK

200-

BK

C

C

W

C

406-PU407-PK

200-

BK

611-

PU

-14

200-

BK

200-

BK

200-

BK

200-

BK

200-

BK

419-YL469-GN540-WH

OPERATOR STATION

OP

ER

ATO

R S

TAT

ION

103-YL

400-GN

200-BK200-BK

200-

BK

200-BK 200-BK

606-GY

200-

BK

324-

BU

200-BK

405-

GY

200-BK

123-WH

200-

BK

200-

BK

200-BK-14

200-

BK

DASHGROUND

484-YL

432-

PK

484-YL

477-YL

200-BK-14200-BK

C

405-GY

407-

PK

BU

-18

406-

PU

RD

-18

405-

GY

BK

-18

322-GY

A

322-GY

200-BK-14

443-YL

B

400-GN

443-YL

506-PU

407-PK

310-PU

403-GN400-GN

605-YL

326-PU

400-

GN

627-YL

490-GN706-BR614-PU

611-

PU

-14

110-GN

L22

ALTERNATORCHARGE RELAY9W-2494

308-YL

506-PU

DD

539-BU

A

539-BU540-WH

540-WH

484-YL

506-PU

443-

YL

540-WH

370-BU

403-GN

B404-YL200-BK

469-

GN

419-

YL

450-YL 449-BU

173-YL432-PK

572-PU

BB

374-PK324-BU604-OR

619-GN-14

L11

614-PU614-PU

614-PU614-PU

123-WH123-WH

199-OR

190-PK

OP

ER

ATO

R S

TAT

ION

199-OR

BK

200-BK

611-

PU

-14

190-PK

706-BR

A958-WH

490-

GN

L25

605-YL

A958-WH

C

507-WH

453-PK

L22

611-PU-14

484-YL

B

606-

GY

605-

YL

614-

PU

B

L25

614-PU

200-BK-14

BK

B

NOTE E: WIRES ARE TO BE TIED BACK AND ENCAPSULATED WITH HEAT SHRINK TUBING

D-5

501-GN118-GY500-BR502-OR

FRONT WIPERMOTOR GP3E-5147

165-YL

103-YL

F

103-YL

102-BU-14

200-

BK

200-

BK

308-YL

102-

BU

-14

103-

YL

611-

PU

-14

105-

BR

310-PU

114-

GN

611-PU-14

118-

GY

+

123-

WH

165-

YL

130-

GN

370-BU

105-BR

118-GY

173-YL

130-GN

R

A

CAB LAMPS

INDICATOR LAMPS

A958-WH

V

190-PK

103-

YL

B BBB

123-WH

A

539-

BU

L42

123-WH

403-GN

123-WH

200-BK200-BK

+24

-

490-GN

324-BU

614-PU614-PU

123-WH 123-WH

374-PK

BBBBBB B

130-

GN

A

130-

GN

130-

GN

130-

GN

130-

GN

130-

GN

307-OR

130-

GN

432-PK

130-

GN

130-

GN

130-

GN

130-

GN

130-

GN

200-BK

130-

GN

130-

GN

324-BU

AA

BU

B

L4

123-WH130-GN165-YL105-BR

624-YL173-YL

118-GY

114-GN

130-GN

506-PU500-BR

602-WH

200-BK

200-BK

130-

GN

308-YL

501-GN

614-PU614-PU

610-OR-14

SPEEDOMETER8C-9808

TACHOMETER9X-5523LAMP2U-4806

SERVICEMETER6T-7337

326-PU

CONVERTERTEMP GAGE4W-2066LAMP2U-4806

322-GY

103-YL-14

102-BU-14

501-GN

419-YL

CAB LAMP SW6T-3990

HORN SW3T-2357

FRONT WIPER SW3T-6655

103-YL

AA

A

RUNNINGLAMP SW8C-9636

627-

YL

200-BK-14

L42

D

200-BK

L42

604-OR619-GN-14

619-GN-14

432-

PK

L42

432-PK

L41

L6

A

506-

PU

L41L41L41

L41

D775-OR453-PK618-YL617-BRB762-GNB761-YL

G E F J H L K W V U T S R P N M 1 200-BK-14

324-BU B A D 3

200-BK

522-WH-14

T

OPERATOR STATION

B

371-

OR

BRAKE OIL PRESSURE SW7U-9037

L12

L2

521-YL-14

371-OR

L2

L23

432-PK

370-BU

370-BU

DIMMER SW2H-1855

START AIDVALVE9G-4365

A/C CLUTCHSOLENOID8T-8813

REFRIGERANTSWITCH5V-5698NOTE A

START AID SW6T-6066

D

D

432-

PK

3

200-

BK

STOP LAMP SW7U-9036

604-OR

BK

L39

D D173-YL

L39

RH BACK UPLAMP9X-1439BULB9X-3463

500-BR

60A

540-

WH

124-GN-14

200-BK

158-BR173-YL

158-BR DIFF LOCK

L38L38

10A

121-YL

L38

CAB LAMP9X-1439

200-

BK

L38

624-

YL

L38

484-

YL

LIMIT SWITCH AS. 2U-9160

YL YL

BU

506-PU

FRONTWASHER MOTOR2U-4570

MOTOR

4 2

L23

2431

K DIFFLOCK SW3E-0307

477-YL

AWH 449-BU

SPEEDOMETERSPEED PICKUP9X-5393

F-10B-2

NOTE LOCE

E

618-YL

112-PU-14

200-BK

112-PU-10

Z

2

E

87

E

3 1

E

4

E

E

E

321-

BR

200-

BK

200-

BK

200-

BK

614-

PU

614-

PU

606-GY

NOTE C: D20D ONLY

605-

YL

606-

GY

604-

OR

614-

PU

604-

OR

B-1

X

WIRE AS.

J

321-

BR

200-

BK

-14

200-

BK

-14

H

321-

BR

604-

OR

L22

604-

OR

321-

BR

200-

BK

-14

LAMP

LH BACK UPLAMP9X-1439BULB9X-3463

200-BK

200-BK

200-BK

BACK UPALARM3T-1815

321-BR

321-BR

200-BK

614-PU604-OR

614-PU604-OR605-YLLH STOP/TAIL/TURN

LAMP2U-9213BULB7H-29763H-2691

RH STOP/TAIL/TURNLAMP2U-9213BULB7H-29763H-2691

614-

PU

606-

GY

102-BU-14

502-OR

BK

308-YL

101-RD-14101-RD-14

101-RD

RUN LAMPS BREAKER9G-9487

10A

370-BU

306-GN

NOTE F: NOT REQUIRED ON THIS MODEL

130-GN

D

101-RD-14101-RD-14

BR

D

112-PU-14

130-GN

109-OR-6

124-GN-14

D

D

D610-OR-14

105-BR

109-OR-6

109-OR-6

101-RD-6101-RD-14

B-2

D

ALT BREAKER9S-0174

AIR CONDITIONERBREAKER6N-8589

HEADLAMP BREAKER6N-8589

KEY BREAKER9G-9487

101-RD

112-PU-14

NOTE G

624-YL

190-PK

103-YL

124-GN-14101-RD-6

200-BK-14

SEEAREA G

105-BR

101-RD-14

A

200-

BK

308-YL

200-

BK

-14

200-

BK

-14

ALTERNATOR5N-5692

RESISTOR9G-1950

BLOWER9G-8697

WH/RD-14

BK-14

WH/RD-14

BK-14

BLOWER9G-8693

200-BK-14

200-BK-14200-BK-14

515-GY-14

515-GY-14

4

THERMOSTAT3E-5464

200-BK-14

124-GN-14

200-BK-14

521-YL-14515-GY-14

522-WH-14

522-

WH

-14

BLOWER SW6P-3236

345

515-GY-14

5352

1-Y

L-14

124-

GN

-14

200-

BK

-14

517-BU-14516-GN-14515-GY-14

517-BU-14

21

112-PU-10

101-RD

Z

199-OR

200-BK

539-

BU

502-OR

505-BU

706-BR

504-YL503-BR

L4

BODY TIP SW 7U-6554

BK

-18

RDGYGNBK

YLWHWH

YL

BK

605-

YL

BK

-18

GN DOWN DIRECTDOWNUPUP DIRECT

GY

9

200-

BK

Y

200-

BK

200-

BK

-14

200-

BK

-14

A958-WH

200-BK

419-YL

200-BK200-BK

199-OR

374-PK

540-

WH

RETARDERNOTE B

450-

YL

324-BU

10A

PARK BRAKEPRESSURESWITCH102-3648

PARK BRAKESOLENOID3E-9257

513-OR-14

200-BK

200-BK

200-

BK

-10

200-

BK

-10

200-

BK

-14

200-

BK

-14

200-

BK

-10

200-

BK

200-

BK

301-BU-10

507-

WH

200-BK-10

326-PUENGINESHUTDOWNSOLENOID8C-3663

450-

YL

200-

BK

TACHOMETER ENGINE SPEED PICK UP5N-9292

ENGINE OIL PRESSURE SW9X-4276

405-

GY

400-

GN

469-

GN

200-

BK

611-PU-14

454-GN610-OR-14

614-PU

614-PU200-BK-14

415-

GN

539-BU

540-WH619-GN-14

619-GN-14

200-

BK

RD

J

INHIBIT

J

200-

BK

-14

BK-6

200-

BK

200-

BK

J

324-BU200-BK

200-

BK

411-

PK

490-

GN

201-

BK

CB

200-

BK

EE

L20

101-RD-6

L28

200-

BK

BK

XSMN LOCK UPPRESSURE SW9X-4276

42

13

31

24

B

NOTE C

199-OR

L28

U

LH STOP/TAIL/TURNLAMP2U-9213BULB7H-29763H-2691

RETARDER INHIBITPRESSURE SW2U-9444

SUPPLY

12V BATTERY3T-5760

706-BR

12V BATTERY3T-5760

DISCONNECT SW7N-0718

FRAMEGROUND

AUX STARTRECEPTACLE

BK-00

BK-00BK-00

101-RD-6

RD-00RD-00

TO ENGBLOCK

STARTER9X-9995

BK

-4

RD-00BK-00

200-BK-10

200-BK-14301-BU-10

BK-00

200-

BK

-14

109-OR-10

TOFRAME

BK

-00

200-

BK

407-

PK

321-BR

200-BK

C

J

200-

BK

200-

BK

J

3

200-BK-14

200-BK-14

200-

BK

00

COOLANT TEMP SW9W-1519

COOLANT TEMP SW8C-3569

160-BU

200-

BK

GN

610-

OR

-14

321-BR

B-1

130-

GN

14

56

23

STONOFF

BSC

R

606-GY

200-BK

BU

-18

RD

-18

BK

-18

200-BK

311-

WH301-BU-10

200-BK

618-YL

L17

L37

B

L37

L36

L36 L36

L35L35

L10

L29

10A

RH BACK UPLAMP9X-1439BULB9X-3463

15A

KEY START SW9G-7641

TURNSIGNAL SW9G-5589

FLASHER8D-6946

112-PU-14

112-PU

112-PU

112-PU-14

HEADLAMP101-4356

112-PU

HEADLAMP101-4356

112-PU-14

HORN

BODY TIP CONTROL

EE

FRONT WASH/WIPE

GAGES

START AID

PARK BRAKE

CAB LAMPS

INDICATOR LAMPS 10A

10A

10A

10A

10A

10A

10A

10A

BACK UPALARM SW3T-3132

15A

130-GN

173-YL

190-PK

165-YL

123-WH

118-GY

160-BU

114-GN

121-YL

101-RD

101-RDBACKUP ALARM

477-

YL

SIG

443-YL

SIG

-+24

123-WH

10A

+-

IGN

SEND

GRD

RIGHT TURNINDICATOR7N-9967BASE2G-0151

RETARDER INDICATOR7N-9967BASE2G-0151

TRANSMISSION TEMPINDICATOR7N-9967BASE2G-0151

ALTERNATORINDICATOR7N-9967BASE2G-0151

BRAKE OILLOW PRESSUREINDICATOR7N-9967BASE 2G-0151

COOLANTTEMP INDICATOR7N-9967BASE 2G-0151

ENGINE OILPRESSUREINDICATOR7N-9967BASE 2G-0151

614-PU

HI BEAMINDICATOR7N-9967BASE2G-0151

L14

TRANSMISSION LOCK UPINDICATOR7N-9967BASE2G-0151

PARK BRAKEINDICATOR7N-9967BASE2G-0151

LOW FUEL LEVELINDICATOR7N-9967BASE2G-0151

LEFT TURNINDICATOR7N-9967BASE2G-0151

BR

BR

DIFFERENTIALLOCK INDICATOR7N-9967BASE2G-0151

L35L35

L34

B

2

B

B

L34

L34L34

L34

L33

BU-18

BK-18

419-

YL

374-

PK

200-BK

BB

B

B

B

B

B

B

BBB

B

B

32

65

DOME LAMP8C-9678

B

W PL

HB

105-

BR

165-

YL

130-

GN

123-

WH

114-

GN

173-

YL

102-

BU

-14

103-

YL-

1411

8-G

Y

B

C

E

CD

L13

L12

419-YL306-GN

200-BK

200-BK200-BK

200-BK-14C/B PANEL GND

200-

BK

-14

200-BK

160-BU

B762-GNB761-YL

BODY TIP CONTROLSW 2U-6683

INHIBITSUPPLYLOWERRAISE

WHBKGNYL

4 3 2 1

L42

NOTE G

200-

BK

F

507-WH

200-BK-14

419-YL

503-BR504-YL505-BU

200-BK-14200-BK-14

FUSEHOLDERS4K-5122

FUSES10A-3K-8782

L33

110-GN

NOTE G

D775-OR

BODY TIPSOLENOID(LOWER)2U-7294

BODY TIPSOLENOID(RAISE)2U-7294

B761-YL

B762-GN

450-YL

200-BK

200-BK

200-BKB

A

200-

BK

L6

F

E

614-PU

200-BK

L2

2U-9264

B762-GNB761-YL

611-PU-14

L33

L33

200-BK

L33

200-

BK

-14

618-YL606-GY

200-BK

200-

BK

F

EDCBA

HARNESS AS,

W

FUELLEVEL SW7X-1161

RETARDERSOLENOID2U-9195NOTE B

L6

WH

WH

618-

YL

617-

BR

RETARDER SWITCHCONTROL2U-8853

200-

BK

-14

NOTE G

R

307-OR

Q

614-PU604-OR

P

614-PU604-OR

BROR

606-

GY

605-

YL

618-

YL

200-BK

A

E

H

H

3

2 1

BK-18RD-18WH-18

C

324-

BU

158-BR 324-BU

604-

OR

321-

BR

A

200-BK200-BK

304-WH-10

L29

173-

YL

112-PU

L32

START RELAY9F-3099

MAIN POWERRELAY3T-0376

304-WH-10

D C

103-

YL

306-GN200-BK-14158-BR

118-GY

173-YL124-GN-14121-YL

L32

L32

L32

A

A

A

A

F

200-BK200-BK-14

D

L8

200-BK

160-PU

617-

BR

627-

YL

FRONT WASH/WIPE

A

D

JJ

200-BK

6

200-BK

374-PK121-YL

DOMELAMP SW9D-4068

C

200-

BK

118-

GY

624-

YL

502-

OR

500-

BR

A

324-

BU

501-

GN

200-BK

200-BK

L

H

PB+

GNDMOTOR

ORBRGYGN

BK

L6

1 7

OP

ER

ATO

R S

TAT

ION

324-

BU

F

JJ

J

J

324-BU

L27

602-

WH

FF

103-

YL

F

J

J

D

T T

NEGPOSNEGPOS

G S

MTR BAT

MOTOR

C

2

406-BU200-BK

611-PU-14619-GN-14

D

L2L1

419-

YL

NEUTRAL START SW2U-8834

L11

321-BR

103-

YL

DIFFERENTIALLOCK SOLENOID2U-6512

L15

L26

L26L26

21

HORNHI TONE7T-0970

HORNLO TONE7T-0969

CABLE AS.

CC

201-

BK

200-

BK

C

REAR WASH/WIPE

112-PU

CNOTE E

NOTE A: NORMALLY OPEN BEFORE REFRIGERANT CHARGEUNLESS OTHERWISE SPECIFIED: ALL WIRE IS 16 GAGE

COMPONENTS ARE SHOWN INSTALLED ON A FULLYOPERABLE MACHINE WITH THE KEY AND ENGINE OFF

THIS SCHEMATIC IS FOR THE D20D AND D250DARTICULATED DUMP TRUCKS (6V-5895 CHG 00).

IDENT PART NO. LOC

NOTE B: ATTACHMENT ON D250D

UNLESS OTHERWISE SPECIFIED: ALL WIRES IN A SPLICEARE THE SAME IDENT. NUMBER, COLOR, AND 16 GAGE

AND XMSN SHIFTER IN NEUTRAL

V

CHG

X

N

200-BK

112-PU-14

NOTE G

200-BK

160-BU BODY TIP CONTROL

BKBK

YLYL

706-BR

CONV TEMP SW9X-5602

572-

PU

LH BACK UPLAMP9X-1439BULB9X-3463

REAR WASH/WIPE

C

MOTOR

MOTOR

L37

ALL DASHED LINES ARE ATTACHMENTS.

WIRES THAT HAVE BATTERY VOLTAGE WHEN THE KEY SWITCH IS OFF.

WIRES THAT HAVE BATTERY VOLTAGEWHEN THE KEY SWITCH IS ON.

STARTING CIRCUIT.

GAUGE CIRCUIT.

MONITOR CIRCUIT.

PANEL LAMP CIRCUIT.

WIPER/WASHER CIRCUIT.

HEATER AND AIR CONDITIONER CIRCUIT.

GROUND CIRCUIT.

ENGINE SHUTDOWN CIRCUIT.

TURN SIGNAL CIRCUIT.

START AID CIRCUIT.