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Component LocationComponent
Schematic Location
Machine Location
ComponentSchematic Location
Machine Location
Actuator — Governor C-7 1 Seat — Heater E-4 36
Alarm — Action E-2 3A Sender — Engine Coolant Temp C-12 19
Alarm — Travel D-12 2 Sender — Hydraulic Oil Temp A-8 3F
Alternator B-12 3 Sensor — Fuel Level A-5 20
Antenna C-6 4 Sensor — Engine Speed B-12 21
Batteries E-11 5 Solenoid — A/C Compress Clutch C-12 22
Block — Terminal D-9 1D Solenoid — Engine Shutdown B-12 23
Breaker — Alternator D-9 4D Solenoid — Fine Swing B-4 24
Controller B-7 6 Solenoid — Hammer Control B-4 25
Converter B-6 34 Solenoid — Level B-9 4F
Dial — Engine Speed C-2 3B Solenoid — Travel Speed B-9 1F
Fuse — Block F-7,8,9 6D Solenoid — Trenching B-9 2F
Horns A-2 8 Switch — Boom Raise Pressure B-10 3E
Lamp — Boom A-2 9 Switch — Disconnect D-9 5D
Lamp — Cab E-1 10 Switch — Engine Oil Pressure B-12 28
Lamp — Chassis A-2 11 Switch — Fine Swing Control F-3 6C
Lamp — Dome C-6 12 Switch — Governor Backup B-5 6B
Lighter — Cigar E-3 1A Switch — Hammer Control C-3 9B
Meter — Service E-2 2A Switch — Horn F-2 3C
Monitor E-2 4A Switch — Implement Swing Pressure B-10 1E
Motor — Lower Wiper F-2 13 Switch — Low Idle D-3 2B
Motor — Starter B-12 14 Switch — Neutral Start F-2 29
Motor — Washer E-12 15 Switch — Pump Backup F-4 2C
Motor — Wiper F-2 16 Switch — Radio Control E-4 7C
Pump — Refueling A-3 17 Switch — Refrigerate Low Pressure E-12 30
Radio C-6 18 Switch — Refueling A-5 31
Relay — Boom Lamp E-8 7D Switch — Refueling Pump (start) A-3 32
Relay — Chassis/Cab Lamp E-9 7D Switch — Refueling Pump (stop) A-3 32
Relay — Horn E-7 7D Switch — Seat Heater F-3 4C
Relay — Main D-7 3D Switch — Speed Change C-4 5B
Relay — Refueling Pump E-7 7D Switch — Key Start B-2 1B
Relay — Starter D-7 35 Switch — Travel Pressure B-10 2E
Relay — Washer E-8 7D Unit — Air Conditioner E-6 33
Relay — Wiper E-9 7D Unit — Heater E-6 37
Resistor — Backup F-5 1C Valve — Proportional Reducing A-9 5F
Machine locations are repeated for components located close together.
Harness Connector Location
ConnectorMachine Location
Harness And/OrComponents
Schematic Location
ConnectorMachine Location
Harness And/OrComponents
Schematic Location
40 ContactsCONN1
*A - 111-4806Controller
B-7CONN23 A - 111-4806
K - 7Y-3868F-3
24 ContactsCONN2
*A - 111-4806Controller
A-7CONN40 C - 5I-8268
A/C Clutch SolenoidC-12
CONN9 D
A - 111-4806 B - 116-5513
D-10CONN50
EB - 116-5513 Boom Raise Press Sw
B-10
CONN8D
A - 111-4806 B - 116-5513
E-10CONN34 B - 116-5513
Q - 113-2486A-4
CONN13A
A - 111-4806 F - 117-5646
C-5CONN49 B - 116-5513
Fuel Level SensorA-5
CONN3D
A - 111-4806 G - 114-5267
E-9CONN51
EB - 116-5513 Implement Swing Press Sw
B-10
CONN5D
A - 111-4806 G - 114-5267
F-9CONN53
FB - 116-5513Level Solenoid
B-9
CONN6D
A - 111-4806 G - 114-5267
F-9CONN38 B - 116-5513
N - 7Y-3943A-3
CONN24 A - 111-4806 H - 51-8215
D-4CONN56
FB - 116-5513Proportional Reducing Valve
A-9
CONN18B
A - 111-4806 J - 7Y-3921
D-5CONN39 B - 116-5513
D - 116-8177F-12
CONN17C
A - 111-4806 L - 102-7902
F-5CONN41 B - 116-5513
Refueling PumpA-3
CONN4D
B - 116-5513 G - 114-5267
D-9CONN48 B - 116-5513
ZZ - 5I-8258A-5
7 ContactsCONN14
AA - 111-4806 E - 6C-91 17
C-5CONN47 B - 116-5513
S - 113-2485A-4
6 ContactsCONN10
DA - 111-4806 B - 116-5513
D-10CONN42 B - 116-5513
Engine Speed SensorB-12
CONN15C
A - 111-4806 A/C Unit
E-6CONN7 B - 116-5513
T - 5I-8255A-3
CONN15C
A - 113-1159 Heater Unit
E-6CONN45 B - 116-5513
Travel AlarmE-12
CONN19B
A - 111-4806 J - 7Y-3921
D-5CONN52
EB - 116-5513Travel Pressure Sw
B-10
CONN44D
G - 114-5267Governor Actuator
C-8CONN55
FB - 116-5513Travel Speed Solenoid
B-9
CONN27B
H - 5I-8215 Engine Speed Dial
C-2CONN54
FB - 116-5513Trenching Solenoid
B-9
CONN58D
A - 111-4806 A - 111-4806
C-8CONN31
AE - 6C-9117Action Alarm
D-2
CONN33 M - 6C-9362Lower Wiper Motor
F-2CONN20
BJ - 7Y-3921Attachment
B-3
CONN32 F - 117-5646 Wiper Motor
F-2CONN22
BJ - 7Y-3921Attachment
B-3
CONN30A
E - 6C-9117Monitor
E-2CONN46 T - 5I-8255
Fine Swing SolenoidB-4
CONN12 F - 117-5646 R - 7Y-8105
B-6CONN37 U - 5I-8234
Hammer Control SolenoidB-4
CONN25 A - 111-4806 H - 5I-8215
D-4CONN68
CA - 111-4806Y - 106-0026
E-5
CONN25A A - 111-4806W - 5I-8374
E-3CONN70
CY - 106-0026 Radio Control Sw
E-4
CONN25B H - 5I-8215 W - 5I-8374
D-3CONN71 B - 116-5513
V - 106-0026A-9
CONN21B
J - 7Y-3921Attachment
B-3CONN72 W - 5I-8374
X - 5I-8375F-5
CONN64 R - 7Y-8105Converter
B-6CONN63 R - 7Y-8105
ConverterD-6
CONN60C
L - 102-7902Attachment
F-3
CONN61C
L - 102-7902Seat Heater Switch
F-3
CONN62C
A - 111-4806 Seat Heater
E-4
CONN67C
X-5I-8375Fine Swing Control Sw
F-3
CONN26B
H - 5I-8215Low Idle Switch
D-3
CONN59C
K - 7Y-3868Horn Switch
F-3
*= Connector is located at the component.
2 Contacts
1 Contact
10 Contacts
5 Contacts
3 Contacts
4 Contacts
A1
2 3
33
5
6
7 89
10
11
12
13
14
15
16
3
4
5
6
89
10
11
12
14
15
13
16
B
C
D
E
1
2
17
18
19
20
22
2324
25
26 27
28
29
30
3132
37
35
3334
36
38
7
F
17
18
1920
21
2223
24
25
26
27 28
29
30
31
32
2610
9
8
A
1
2
3
5
6
7
8
9
1011
12
13
14 15
16
3
4
5
68
9
10
11
12
14
15
13
16
B
C
D
E1
2
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
37
35
33
34
36
38
7
F
17
18
19
20
21
22
23 24
25
26
27 28
3331
32
1
MACHINE HARNESS CONNECTOR AND COMPONENT LOCATIONS
3200369
1
2
3 4
5
6
7
83
2
1
3
4
56
8 91
3
2
12
7
AREA A
AREA B
330158
3200370
1
34
5
6
7
8
9
10
3
4 5 6
1
2 7
1
2
3
4
5
6
7
8
910
3
45
6
89
12
7
AREA C
AREA D
3200371
3200302
1
2
3
4
5 6
3
4
5
6
1
2
7
3
1 2
1
2
3
AREA E AREA F3200191 3200303
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 AA
1
2
325-PK-14
C A325-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.
SENR6242August 1994
320, 320 N, 320 L And 320 SExcavators Electrical System9WG1161-UP4ZJ597-UP
3XK1909-UP6KM213-UP
©1994 CaterpillarAll Rights Reserved
Printed in U.S.A.
5
4
4
3
1
2
1
1
1
7
3
6
7
7
2
9
3
8
5
6
1
7
8
29
30
7
28
11
12
1
13
14
2
3
15
4
16
17
18
19
20
21
22
3
1
2
2
6
8
25
26
8
9
31
33
27
4
5
6
10
5
3
789101112
101112
BKRDBU
500-
BR
501-
GN
501-
GN
501-
GN
118-
GY
200-
BK
200-
BK
500-
BR
168-GN
168-GN
323-WH
513-OR
519-PK
1
168-GN
513-OR2519-PK
1234
501-
GN
118-
GY
200-
BK11
8-G
Y50
1-G
N
BKRD
200-BK575-YL152-BU576-PK
BKRD
501-
GN
200-
BK
307-
OR
326-
PU
105-
BR
310-
PU
308-
YL
200-
BK
118-
GY
308-
YL
310-
PU
105-
BR
326-
PU
307-
OR
200-
BK
200-
BK
307-
OR
326-
PU
105-
BR
310-
PU
322-GY616-BU
607-PK
323-WH
200-BK
308-
YL
BKRD
200-
BK
200-BK
200-BK
200-
BK
200-
BK
RDBK
RDBK
575-YL
200-BK
OR-18
200-
BK
307-
OR
135-BU
506-PU
6 5 4
BK-18
AM/FM RADIO
210-BK
307-OR152-BU575-YL576-PK
306-GN320-OR
200-
BK
200-
BK
309-GY 308-YL
OPERATOR STATION
RELAY PANEL
147-PU
578-BU152-BU
575-YL152-BU576-PK
200-BK
586-BR
267-BK
235-BK235-BK
235-BK
200-BK586-BR
320-OR
200-BK
616-BU
616-BU200-BK
BK/PK
152-BU576-PK306-GN
BK
BK-18BK-18
326-
PU
149-PU
105-
BR
310-
PU
5
114-GN
WHBK
200-BK
200-BK
325-PK
149-PU
149-PU
115-PK
115-PK
115-PK
114-GN
114-GN
786-GN
586-BR
200-BK
365-YL
200-BK
325-PK
616-BU
200-BK
308-
YL
322-GY607-PK
365-YL
RDBK
200-BK200-BK
200-
BK
200-
BK
200-
BK
OPERATOR STATION
F
E
D
200-
BK
200-
BK
200-
BK
C
BKRD
BRGNBUPKBK
200-BK
519-PK
B
RELAY PANEL
306-GN
RELAY PANEL
578-PU
BKBK
200-BK
200-BK
122-BU
RD-18BK-18
235-BK495-GN
200-BK
200-BK
265-BK
491-PKBKYL
325-
PK
365-
YL
200-
BK
200-
BK
200-
BK
200-
BK
200-
BK
200-
BK
615-
YL
A
506-PU
586-BR147-PU
200-
BK
2
200-
BK
4321
142-
BU
142-
BU
308-YL
615-YL
323-WH
500-BR501-GN118-GY113-OR120-YL
152-BU103-YL
142-
BU
152-BU118-GY121-YL184-BU103-YL114-GN
323-WH
513-OR
607-PK
200-BK
616-BU322-GY
307-OR
607-PK
306-GN307-OR
1
200-BK320-OR
200-BK
200-BK
200-BK200-BK322-GY322-GY
200-BK322-GY
616-BU200-BK 200-BK
616-BU
200-BK575-YL152-BU576-PK
9 8 7 6 5 4 3 2 1
F
E
D
3 2 1
C
B
A
D
F
E
B957-GN
ATCHREFUELING RELAY 7Y-5490
B957-GN
NOTE A : USE WHEN ATCH HAMMER OR ATCH MEDIUM PRESSURE
ATCH HAMMER FOOT SW IS USEDNOTE H : CONNECT THIS WAY WHEN
NOTE G : HARNESS UU IS INSERTED BETWEEN HARNESS A AND H WHEN ATCH RPMIS INSTALLED
NOTE J : USE WHEN ATCH FOPS IS INSTALLED
365-YL
365-YL
NOTE E : COMMON TO 322,320.
NOTE F : COMMON TO 322,320,325,330
12
B957-GN
B957-GN
PROVISION FOR ATCHSW 7X-6386
TT 115-7126UU 115-7125
RR 117-7253SS 115-7124
PP 116-9209QQ 117-7332
168-GNB957-GN
X
21
ATCH FINE SWINGCONT SW 7X-6386
D760-YL200-BK
L27
L27
W
W
2
H
1 331
A
D76
0-Y
L2
200-
BK
B78
6-B
U
551-YL547-OR
548-GY551-YL
21
NOTE H
3 2 1
547-
OR
3 2 1
551-
YL
548-
GY
551-
YL
SS TT
PP PP
551-
YL
548-
GY
547-
OR
551-
YL
955-
BU
547-
OR
551-
YL
955-
BU
547-
OR
551-
YL
548-
GY
547-
OR
PP PP
TT SS
551-
YL
548-
GY
551-
YL
3 2 1
TT TT
ATCH BOOM DOWNSOL. 4I6158
2 1
TT TT
12
547-
OR SS
ATCH HAMMERCONT.SOL.7Y5005
3 2 1
ATCH SERVICEMETER6T7337
-+
548-
GY
551-
YL
548-
GY
551-
YL
548-GY551-YL-
+
EN
GIN
E S
PE
ED
CO
NT
RO
L 12
TT
ATCH HAMMERCONT. SOL.116-4416
ATCH RPM REGULATOR116-9958
K973-PKK974-PUK975-WHK976-BR200-BKA755-PKA756-BUA757-GYA758-BR
1 234
M
200-BK
ATCHCOMBINED SOL
A QQ
ATCHLIMIT-SW3T3132
952-OR
200-BK
1 2
952-OR
1 234
1
2
3
4
152-BU
L24
152-BU
D761-GN586-BR
L24
L34
F
+
S
+1
-
MOTOR
M
MOTOR-
+1
S
+
MM 113-9860NN 112-3336
L38
L37
L31
L31
L30
L30
L36
F
F
UPPER WIPER6C9102
615-
YL
200-
BK
LOWER WIPER6C8438
LA200-BK A770-PK
4 3 21
A
21
124-GN
519-PK
L11
147-PU
124-GNA537-PK 2
1
F
8103
YL/
RD
8103
YL/
RD
2 1
F
B95
7-G
N16
8-G
N
PROVISION FORBEACON LIGHT
6 DIN 46327
NOTE B : USE WITH CAB RISER
L40
NOTE E
NOTE E
NOTE F
NOTE J
JJJ 6C-9134 E-1 NOTE JD-4 NOTE FD-2 NOTE F
21
D-1 NOTE FC-3 NOTE FF-1 NOTE E
200-BK
A
B747-PU
185-YL
A768-BUA769-GY
B730-OR
B731-WH
B747-PU
200-BK
Z 117-7029 E-4Y 106-0026 E-4
ATCH RADIO SW
YA
ATCHRADIO SW 7X-6386
122-BU120-YL2
1120-YL
B74
7-P
U
B747-PU
B747-PU
B74
7-P
U
B747-PU147-PU
12
A-6 NOTE E
200-BK
B747-PU147-PU
WINDSHIELD SW9G2795
124-GN
A537-PK
9
6
8
124-GN-14519-PK615-YL103-YL200-BK-14
2
ATCHA/C UNIT107-1994
2
A
1
34
5
NOTE D : USE WITH COLD WEATHER.
D761-GN
ZZ 5I-8258 A-5
D761-GN
U 5I-8234 B-3
D76
0-Y
L
L25
BK
-00
200-BK 306-GN
308-
YL
607-PK
D760-YL
D761-GN
D760-YL
147-PU147-PU
D76
1-G
N
147-PU
607-
PK
142-
BU
-14
D761-GN
616-BU
147-PUD760-YL
ATCH FINE SWINGRELAY 7Y-5490
147-PU
200-BK-4
FINE SWING
RISER PLATFORM
FF(NOTE B)
D760-YL
L28
ATCHFINE SWINGSOL 4I-1042
W
D760-YL200-BK
BK
-00
200-BK
2
200-BK
BOOM RAISE SW102-8042
200-BK
12
A761-PU184-BUA983-BU792-OR791-PK
B
786-GN
200-BK
L15
200-
BK
B75
1-Y
LA
763-
GY
A76
1-P
U11
3-O
R
L25
304-WH-8
101-RD-6
109-OR-6
101-RD-14
109-OR-6
101-RD-14101-RD-6
309-GY
109-OR-6
XX
G
G
WW
G
GG
YY109-OR-8
G
A761-PU
792-OR791-PK
112-PU-14
786-GN
112-PU-14
184-BU
112-PU-14
A983-BU
B751-YLA763-GY
113-OR
615-YL
120-YL
147-PU
152-BU
124-GN-14129-BU
118-GY
20A15A
142-BU-14113-OR
10A
B751-YLA763-GYA761-PU200-BK113-OR
A769-GY
B-1 NOTE FB-1 NOTE F
LEVEL FINISHSOL 7I-1246
12
B955-YLB956-PK113-OR200-BK
E
H
GROUND+12 VOLT
+ BATTERYGROUND
1 2
3
2 1
F-3 NOTE F
ATCHCONVERTER 108-9968
ATCHANTENNA106-0036
3142
R
R
R
R TO RADIO
122-BU
H
B
AB
PLATFORM
D760-YL
122-BU
124-GN-14103-YL
235-BK
615-YL
D761-GN
615-YL103-YL
120-YL
500-BR501-GN
D76
0-Y
L
118-GY113-OR129-BU403-GN410-WHB955-YLB956-PK
B731-WHB730-ORA769-GYA768-BU
185-YL185-YL
200-
BK
147-PU586-BR152-BUA763-GYB751-YLB739-WH
200-BK-6
B789-BRB740-ORB790-OR
B786-BU326-PU308-YL310-PU105-BRA758-BRA757-GYA756-BU
D764-GN
A755-PK
RD-00
200-BK
320-OR
10123 4 5987 6
B734-GY306-GN
1 2
D76
4-G
N
L
L8
NOTE G
UU
UU
K973-PKK974-PUK975-WHK976-BR200-BKA755-PKA756-BUA757-GYA758-BR
UU
K97
3-P
KK
974-
PU
K97
5-W
HK
976-
BR
A75
8-B
RA
757-
GY
A75
6-B
U
H
A75
5-P
K
67 8 9 543 2 110
L34
10123 4 59
L7
87 6
L4
L4
5
43
1
BB
B B
BB
AA
EE
B
B
B
B
GB
GA
G
G
546-BUB734-GY547-OR550-OR
548-GY550-OR549-PK
1
A
23
546-BUB734-GY547-OR550-OR
C
B
C
BB
C
B
C
C
C
C
RESISTOR 7Y-8242
A537-PK
200-BK
PP
129-
BU
K
200-BK
ZZZZ
MOTOR
PP
KK
CHASSIS
RR
RH-SW
LH-SW
ONE TOUCH LOW
IDLE SWH
H
RR
A75
5-P
K
RR
RR
RR548-BU198-PK
198-PK549-PK
RR
1065429781
A
A75
6-B
UA
757-
GY
L32
500-BR501-GN
EE
B75
1-Y
L
200-
BK
B74
0-O
R18
5-Y
LB
789-
BR
B73
9-W
H
4
613
B731-WH
5
2
B79
0-O
RA
763-
GY
185-YL
2
147-
PU
D761-GN
1
185-YL-14
578-BU
586-
BR
27 89 543 61
10
B730-OR
KK
321
12
PLATFORM
21
D761-GN
21
1
B734-GY
ATCH-AUX. VALVE6C6664
10
12
345
9
8
76
U
586-BR
U
200-BK
321
2
PP
PP
PP
B734-GY200-BK
B734-GY
147-PU198-PK
955-BU198-PK
2
21
1
ATCH-HAMMER FOOTSW
ATCH-PRESSURE SWSAFETY
12
T
200-BK
T
578-
BU311-WH
311-WH
WW
6
310-PU
200-BK513-OR
1
152-
BU
B95
5-Y
L
2
124-GN
A537-PK
403-GN
A770-PK
200-
BK
200-
BK
323-WH
112-
PU
-14
147-
PU
1 2
A768-BU
B737-GN
3
A771-PUA769-GY
54
32
1
A768-BU
10763-BU
12
B965-GYB964-YL142-BU-14491-PK
1
D761-GN
112-
PU
-14
12
A-6 NOTE E
586-BR616-BU
3
322-GY607-PK323-WH
200-
BK
365-YL
F-12
112-
PU
-14
4
112-
PU
-14
235-BK495-GNA762-PU
B
A
147-PU
UNLESS 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 320 EXCAVATOR (7Y-3908-02).
JJ 111-4727 E-10HH 7Y-3946 E-10GG 4I-5330 E-11FF 7G-1060 F-6EE 7Y-8299 A-12DD 7Y-3947 D-9CC 111-4732 E-10BB 7Y-3946 E-10AA 111-4807 E-11
CABLE AS.
A
VV 7Y-3941 D-7
WIRE AS.
A
R 7Y-8105 B-6
112-
PU
-14
FF
CAB
791-PK
4
788-YL405-GY
PLATFORMRISER (NOTE B)
CHASSIS
59
326-PU
PLATFORM
B
492-GY101-RD-6304-WH-8
A A
E
E
AA
VV
J
B
B
P 7Y-3994 A-2N 7Y-3943 B-2M 6C-9362 F-2L 102-7902 E-5K 7Y-3868 F-3
H 5I-8215 D-4G 114-5267 F-9F 117-5646 E-2
KK 115-1263LL 114-4876
B 116-5513 B-9
GYPUBR
REDWHITEORANGEYELLOWPINK
ABBREV COLOR
BLACKGRAYPURPLEBROWN
DESCRIPTIONSYMBOL
CONNECTOR
ELECTRICAL CONNECTIONTO VEHICLE STRUCTURE
INTERNAL ELECTRICALCONNECTION TO SURFACEOF COMPONENT
BLADE, SPADE, RING,OR SCREW TERMINAL
BKPKYLORWHRD
GNBU
GREENBLUE
CIRCUIT CONNECTED
CIRCUIT NOT CONNECTED
ATCH WIRE, CABLE,COMPONENT
L# CIRCUIT GROUPINGDESIGNATION
IDENT PART NO. LOC
403-GN
A762-PU
C
B
109-OR-6
B
B
F
EF
A
B
B
B
B
LA
A
J
309-GY
HARNESS AS.
L
ATCH HAMMER-AHC CONT.SW 7X6388
235-BK
120-YL
D764-GN
CHASSIS
B965-GY
213
CAB E
B
788-YL
ATCHBOOM LAMP 5I-8250
8
B964-YLB737-GNA771-PU
A762-PU
788-YL763-BU
A76
9-G
YA
768-
BU
763-
BU
495-GN
L1
L2
L7
152-
BU
492-GY
B96
5-G
YB
964-
YL
491-PK
586-
BR
616-BU
BK-00
142-
BU
-14
405-GY
12
321-BR
491-
PK
L1
ATCH SEAT HEATER
B95
6-P
K
ATCH-PRESSURE SW6C6806
ATCH-BUZZER113-4683
ATCH-SW AS.ROCKER7X6386
YLBR586-BR
CHASSIS
A769-GY
586-
BR
304-WH-8
310-
PU
616-
BU
OPERATOR STATION OPERATOR STATION
101-RD-6
326-
PU
576-
PK
109-OR-6
403-
GN
578-
BU
322-
GY
519-
PK
586-
BR
BK-00
309-GY
G
607-
PK
A76
9-G
Y
616-BU
A76
8-B
U
322-GY
A76
8-B
U
323-
WH
B73
4-G
Y
121-YL36
5-Y
L41
0-W
H
365-
YL
235-
BK
A75
8-B
R
506-PU
A75
7-G
Y
495-
GN
A75
6-B
U
607-PK
A76
2-P
U78
8-Y
L40
5-G
Y
A75
5-P
K
326-
PU
D76
1-G
N
513-
OR
200-BK
B78
6-B
U
103-YL
142-BU-14
FUELSENSOR105-9993
5 6 7
2
B95
6-P
K
101-
RD
-6
B95
5-Y
L
365-YL
B78
9-B
R
B73
7-G
N
S4S3S2S1COM
B79
0-O
R
403-GN
B73
9-W
H
112-PU-14
304-
WH
-8
B74
0-O
R
326-PU
B73
0-O
RB
731-
WH
311-
WH
10
A77
1-P
U
403-
GN
1
109-
OR
-630
9-G
Y
2
NN
3
B747-PU
4
200-
BK
6
4
31
5
2
6
43
152-
BU
B789-BR
575-
YL
A769-GY
308-
YL
ATCHREFUELING SW 5C-6108
492-
GY
RD-00
A768-BU 403-
GN
OPTION SOLENOID
575-
YL
COOLANT LEVEL SWENG OIL LEVEL SW
OPTION SENSOROPTION SW 1OPTION SW 2
B95
6-P
K
200-BK
ATCH CONT.GP RH113-2531NOTE A
4I6168
Z
GB
OPTION RELAY 3OPTION RELAY 2OPTION RELAY 1
GLOW
RS232C RxDRS232C TxD
PWM OUT -PWM OUT +
200-BK
L39L39
149-PU
323-
WH
115-PK
A75
8-B
R
405-GY
ATCHREFUELING PUMP 6C-5572
S
B
B
1
168-GNB957-GN
5
5
2
9
501-GN
168-GNB957-GN
308-
YL
B731-WH
B789-BR
200-
BK
1
185-YL
ALTERNATOR 9W-3043
VV
322-
GY
TRAVEL SW102-8041
308-YL
121-
YL
HORN SW 6I-5088
HORN 7T-0969
500-BR
147-PU
SERVICEMETER 6T-7337
152-
BU
A
113-
OR
B730-OR
A769-GY
A768-BU
320-OR
A768-BU
B95
5-Y
L
YL
185-YL
A771-PU
124-GN-14129-BU185-YL-14105-BR
ATCH-PRESSURE SW101-3082
ATCH REFUELING PUMPSTART SW(NORMALY OPEN)9X4959
1 2
H
N
P
PN
ATCH REFUELING PUMPSTOP SW(NORMALY CLOSED) 9X4959
306-GN
NN
DOME LAMP096-0721
RR
HYD OILSENDER 4I-5394
WASHER RELAYWIPER RELAYCHASSIS LAMP RELAYBOOM LAMP RELAY
GNDGND
+B (24V)
BACKUP SW 1
RS485 -RS485 +BACKUP SW 4
B964-YL
GOV ACTR -
ENG PICKUP SENSOR -
GOV ACTR SENSOR
TRAVEL SW
ENG PICKUP SENSOR +
TRAVEL SOLENOIDFUEL LEVEL SENSORCOOLANT SENDER
HYD OIL TEMP SENDER
TRAVEL ALARM
306-
GN
NN
198-PK
B790-OR
615-
YL
142-BU
410-
WH
B965-GY
B739-WH
142-BU
763-BU
ATCHTRAVEL ALARM 3T-1444
142-BU
NOTE C : USE WITH SHORT BOOM.
SOL 5I-8368
321
PLATFORM
MM
551-YL549-PK548-GY198-PK147-PU550-OR
LL
301-BU-10
MM
L21
AA
B790-OR
BU
578-
BU
B789-BRB789-BRB790-OR
410-
WH
B790-OR
185-
YL
B740-OR
+ -
1
1 2
CAB/CHASSIS LAMP
308-YL
607-PK322-GY
323-WH
200-BK-10
112-PU-14
506-
PU
308-YL
491-PKA771-PUB737-GNB965-GY 20
0-B
K32
3-W
H
500-
BR
506-PU
L13
586-BR519-PK310-PU578-BU
103-YL
2
B964-YL763-BU
118-GY
495-GN
ENG GOVACTR102-8005
200-
BK
A761-PU
L17
21
G
7
6
L17
L23
12
101-RD-6
1
RR
PP
326-PU
492-GY321-BR
L13
A76
2-P
U
ATCHSTART AIDCOOLANT TEMP SW 8C-3569
L20
616-
BU
786-GN184-BU
L20
L17
A983-BU792-OR
405-GY
788-
YL
492-GY
200-BK
200-BK
405-
GY
309-GY
L16
L12
109-OR-6
L12
326-
PU
403-GN
325-PK
L14
L13
5
513-OR
L11
4
L38
3
L9
200-BK-6
513-
OR
F
L7
311-WH
J
T
J
JH
2
788-YLA762-PU
L6
ATCHSTART AID 9G-4365
YY 4I-5450 D-9
RD
-00
403-
GN
L5
BK-00
B
200-BK
L3
200-BK-10
L6
200-BK
L5
BK-00
P 4I-5396 A-2 NOTE C
301-BU-10
L9
RD
-00
RD
-00
2
2
B734-GY
308-YL410-WH
1A758-BRA757-GY
L6
A756-BUA755-PKB786-BUB956-PK
200-BK
4
B955-YL
3
B789-BRB790-OR
RD
-00
B739-WH
21
B737-GN21
B740-OR
495-GN
109-OR-8
235-BK
B730-OR
365-YL
365-YL506-PU
BK-00
323-WH607-PK
B731-WH
322-GY
XX 4I-5447 D-9
L26
142-BU-14
L3
616-BU586-BR
322-GY
D 116-8177
200-BK
21
513-OR
A
200-BK
121-YL
1
T
COOLANT TEMPSENDER 4I-5394
501-GN
304-WH-8
MOTOR
C
CC B
B
304-WH-8
B
GGAAB
BATMTR
SG
BIMPLEMENT SW102-8041
B
L18
YY
XX
WWWW
JJ
CC DD
60A
BB
LL
JJ
506-PU
JJ
L2
L1
B
K
E
L2
L8
L8
KEY START SW 9G-7641
200-BK
H
SS
403-GN
GOV ACTR +
S 113-2485 A-4T 5I-8255 B-3
491-PK142-BU-14763-BUB965-GYB964-YLA768-BUA769-GY
PU
PLATFORM
321-BR
1
A
129-
BU
519-PK
113-
OR
ATCHREFUELING RELAY 7Y-5490
2
501-
GN
578-BU
L26
WW 4I-5448 D-9
118-
GY
B957-GN
311-WH
A75
5-P
K
501-
GN
BK
576-
PK
L26
5
5 43
B75
1-Y
L
1
STARTER 8C-4774
B751-YL
B78
9-B
R
PP
A76
3-G
Y
D764-GN
RD-00
321-BR
L29
310-PU
200-BK
200-BK-14
121-YL
615-
YL
V 117-7028 A-9
198-PK147-PU550-OR
8
10
200-BK
7
7
3
12
5
L28
122-BU
L12
6
Y
B
L13
B
L27
551-YL549-PK548-GY
L15
X
105-BR
410-WH
307-OR326-PU
B-
RD-00
B789-BR
168-
GN
B95
7-G
N
Q
L8
L35
118-
GY
168-GNB957-GN
547-OR546-BU198-PK
Z
12
123456
547-OR546-BU198-PK
551-YL549-PK548-GY198-PK147-PU550-OR
198-PK
L36
200-
BK
548-GY550-OR549-PK
546-BUB734-GY547-OR550-OR
547-OR546-BU198-PK
321
L35
198-PK147-PU550-OR
551-YL549-PK548-GY
551-
YL
548-
GY
547-
OR
551-
YL
955-
BU
547-
OR
L33
200-
BK
L32
102-8041
615-YL501-GN118-GY
WASHER 7T-8890
ATCHLOWER WASHER 7T-8890
311-WH
321-BR
310-PU
21
308-YL
310-PU
500-BR
1
4
586-BR
200-BK
D761-GN
L37
H
A
A75
6-B
U
H
A
500-
BR
B73
9-W
HB
790-
OR
615-
YL
B74
0-O
R
A76
3-G
Y
103-
YL
21
217
ENG/PUMPCONT106-0132
18
12
242316
133
12
45
61814
922
118-GY
178
21
220
B
1917
1510
11
1011
2131
23
288967
19203040363738392927132
1
CHASSISLAMP 5I-8251
HEATER UNIT 107-1995
ACCELBACKUP SW 7N-8008
SPEEDCHANGE SW 3T-4405
ENGINESPEED DIAL7Y-5465
BACKUPRESISTOR102-8015 BACKUP SW
3T-4405
ATCHHAMMERCONT SOL 7Y-5005
CIGAR LIGHTER 9W-0335
NEUTRALSTART SW 9W-2150
3E-6328
MONITOR 7Y-5500
ONE TOUCHLOW IDLE SW 6I-5088
LOW IDLE SW
578-BU
ATCHBOOM LAMP 5I-8250
200-
BK
24143525
32
168-GN105-BR
308-YL
BACKUP SW 2
1
151626
SIGGND
OR 24V+
M
A768-BU184-BU
2
4
SIGGND5V+
5
113-OR
EPR VALVE +EPR VALVE -
1
3
34
33
MONITOR ALARMKEY SW
AUX HYD PRESS. SW
3222
L15
L20
12
506-PU
200-
BK
519-PK
121-YL
513-OR
R
C
L22
SB
A983-BU792-OR
200-BK
791-PK786-GN267-BK266-BK265-BK
OFF
264-BK235-BK
L33
235-BK
RELAY PANEL
ONST
ENGSHUTDOWN SOL 9X-5524
ENG OILSW 6T-1546
CHASSIS
B
B75
1-Y
L
BOOM RAISE PRESS. SW
D764-GN
BK-18RD-18
ENGINESPEED SENSOR 3E-7886
21
121-YL
168-GNB957-GN
ATCH REFRIGERANTSW 114-5334
D
200-BK
A983-BU
G
109-OR-6
200-BK
BK-00
200-BK
REFUELING
120-YL
D760-YL
L21
147-PU
L10
ATCH SEATHEATER SW 7X-6386
200-BK-14103-YL615-YL
500-
BR
501-
GN
118-
GY
120-
YL
21
6
122-
BU
789
5
JJHHGG
CCBBBK-00
POSNEG
B734-GY
4
NEGPOS
BATTERY 3T-5760
32
POSNEG
L22
DISCONNECT SW 7N-0718 7N-0719 (NOTE D)
BLOCK AS. 7Y-5499
LOWER WASHER/WIPER
FUSE10A 9W-144215A 9W-144120A 9W-1446
L11
L18
4
L11L11
L18L14
L15
L16
L19
TRAVEL SPEED SOL 7I-1245
TRENCHING SOL 7I-1247
L19
L17L13
NEGPOS
L22L23
1
10
5
783
2194
HAMMERA/C HEATER
6
10
CIGAR LIGHTERBACKUP
START RELAY 9X-8124
MAIN RELAY 3T-0376
ALT BREAKER 9S-0174
200-BK
KEY SW
WASHER/WIPERTRAVEL ALARMENG/PUMP CONTDOME LAMPHORN
SOLENOIDMONITORRADIO
10
12345
987
BOOM LAMP
6789
54321
10HORN RELAY 7Y-5490
BOOM LAMP RELAY 7Y-5490
WASHER RELAY 7Y-5490
CAB/CHASSIS LAMPRELAY 7Y-5490
WIPER RELAY 7Y-5490
6
10A10A
3
10A10A
2 1
BU-18
B+WDALT
ATCHA/C CLUTCHSOL101-1759
T
10A10A
10A20A
ALTERNATOR (R TERM.)
10A10A15A
KK
10A
HARNESS CODE 1HARNESS CODE 2HARNESS CODE 3HARNESS CODE 4
152-
BU
103-
YL
320-
OR
147-
PU
124-
GN
-14
129-
BU
185-
YL-
1410
5-B
R11
3-O
R
ENG OIL PRESS. SW
MOTOR
A758-BR
ATCHSTART AID SW 7X-63872
A757-GY
519-PK124-GN-14
A763-GY
200-BK-4
HYD OIL LEVEL SW
A75
7-G
Y
YLBKWH
10A10A
B790-OR
THROTTLE DIAL S4THROTTLE DIAL S3THROTTLE DIAL S2THROTTLE DIAL S1
IMPLEMENT SW
L23
TRENCHING SOLENOIDLEVEL FINISH SOLENOID
2
1
113-OR
B
168-GNB957-GN
546-BU550-OR547-OR
L36
L35
200-BK
21
200-BK
A75
8-B
R
403-GN
B
+ -
B786-BU
129-BU
GROUND
DATA -DATA +
A756-BUA755-PK
439-YL
10A
200-BK
15A
200
-BK
615
-YL
10A
ATCHCAB LAMP 5I-8250
K
+BATTERY43
2
X 5I-8375 E-5
10A
B734-GY
21
B78
6-B
U
1
PROVISION FOR ATCHSW 7X-6387(LH CONSOLE)
ATCHCAB LAMP 5I-8250
L40
AUX.CIRCUIT IS INSTALLED
JJJ
615-YL
615-YL200-BK
200-BK
200-BK
JJJ
VZV
Z
PROVISION FOR ATCHSW 7X-6388(RH CONSOLE)
200-
BK
CAB
CAB
308-
YL
RH-SW
LH-SW
K
K
HORN 7T-0970
HORN SW
ATCH CONT.GP LH1132531 NOTE A
198-PK547-OR
A
2
546-BU198-PK
1
LL
LL
LL
L10
LL
3
W 5I-8374 D-3
ATCH
3T-5760
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.
ENGINE/PUMP CONTROLLER CIRCUIT.
WIPER/WASHER CIRCUIT.
HEATER AND AIR CONDITIONER CIRCUIT.
GROUND CIRCUIT.
ENGINE SHUTDOWN CIRCUIT.
START AID CIRCUIT.
CONN 38
CONN 41
CONN 37
CONN 46
CONN 74
CONN 34
CONN 22
CONN 21
CONN 20
CONN 28
CONN 30
CONN 31
ACTION ALARM
CONN 59
CONN 23
CONN 67
CONN 61
CONN 60
CONN 72
CONN 17
CONN 68 CONN 70
CONN 62
PUMP
CONN 15
CONN18
CONN 19
CONN 25CONN 24
CONN13
CONN 14
CONN 49
CONN 48
CONN 64
CONN 63
CONN 12
CONN 1
CONN 2
CONN 58
CONN 44
CONN 55
CONN 54
CONN 53
CONN 56
PROPORTIONALREDUCING VALVE
CONN 4
CONN 3
CONN 6
CONN 5
BATTERY
CONN 8
CONN 9
CONN 10
CONN 52
CONN 51
CONN 50
CONN 40
CONN 45
CONN 39
CONN 15
CONN 25A
CONN 25B
CONN 33
CONN 32
A 111-4806 D-4
C 5I-8268 B-12
E 6C-9117 E-2
J 7Y-3921 D-5
Q 113-2486 A-4
CONN 27
