776B/777C SCHEMATIC ELECTRICAL

©
1997 Caterpillar
All Rights Reserved
Printed in U.S.A.
Component Location
Component
Schematic
Location
Machine
Location
Component
Schematic
Location
Machine
Location
Alarm - Action I-3 A Solenoid - 4 Way B-11 29
Alarm - Backup B-12 1 Solenoid - A/C Clutch B-3 30
Alarm - Engine Overspeed E-4 A Solenoid - Air Start B-1 4
Alarm - Start Aid Out I-6 2B Solenoid - Down Shift A-11 29
Alternator A-3 3 Solenoid - Engine Shutdown B-3 31
Aux Start Receptacle A-4 4 Solenoid - Lockup A-11 33
Battery A-6 5 Solenoid - Proportional B-11 29
Breakers D-4, E-4 A Solenoid - Start Aid 1 B-1 32
Control - Engine Shutdown E-3 A Solenoid - Start Aid 2 B-1 32
Control - Neutral Start G-7 6B Solenoid - Up Shift A-11 29
Control - Payload Monitor E-11 7B Speedometer F-3 A
Control - Start Aid D-6 8B Starter (2) B-4, B-5 4
Control - Supplemental Steering I-2 A Switch - Aftercooler B-7 33
Control - Traction Aid D-8 9B Switch - Backup Alarm F-8 34
Control - Transmission F-8 10B Switch - Blower F-7 16
Dryer-Air C-7 11 Switch-Blower G-6 16
Engine Overspeed Monitor E-5 A Switch - Blower (Att) F-6 16
Engine Speed Pickup B-6 12 Switch - Body Raise F-8 D
Flasher D-3 A Switch - Brake Air D-12 36B
Fuses D-5, E-5 A Switch - Brake Master Cylinder Overstroke B-11 35
Gauge - Air Pressure I-3 A Switch - Brake Oil B-8 20
Gauge - Brake Oil Temp G-3 A Switch - Brake Retract E-2 A
Gauge - Coolant Temp G-3 A Switch - Converter B-8 33
Lamp - Engine Overspeed Warning E-5 A Switch - Coolant A-3 37
Lamp - Master Action F-2 A Switch - Coolant B-4 21
Lamp - Payload Monitor (Green) A-3 13 Switch - Disconnect I-5 D
Lamp - Payload Monitor (Green) I-2 14 Switch - Dome Lamp F-6 A
Lamp - Payload Monitor (Red) A-2 13 Switch - Door Courtesy Lamp I-4 A
Lamp - Payload Monitor (Red) I-2 14 Switch - Engine Oil B-4 38
Lamp - Retarder Indicator E-3 A Switch - Engine Overspeed Test E-5 A
Lamp - Start Aid Out 1 I-4 A Switch - Fuel B-4 39
Lamp - Start Aid Out 2 I-4 A Switch - Fuel Filter B-4 39
Lamp - Supplemental Steering I-4 A Switch - Head Lamp Dimmer H-2 A
Module - Stop/Tail Lamp A-12 15 Switch - Key Start E-3 A
Motor - Blower F-6 16 Switch - Operator Monitor Test F-3 A
Motor - Blower F-7 16 Switch - Parking Brake D-12 36B
Motor - Blower (Att) F-6 16 Switch - Refrigerant C-2 40
Motor - Brake Retract B-9 17 Switch - Retarder H-11 A
Motor - Supplemental Steering B-6 18 Switch - Running Lamp I-4 A
Operator Monitor F-4 A Switch - Secondary Brake I-12 36B
Payload Monitor Operator Panel D-6 A Switch - Service Brake (2) H-11 36B
Relay - Start (2) B-4, B-5 4 Switch - Shift Lever F-8 34
Relay - Steering Motor B-6 19 Switch - Start Aid Bottle Reset 1 B-1 32
Resistor - Blower F-6 16 Switch - Start Aid Bottle Reset 2 C-1 32
Resistor - Blower F-7 16 Switch - Steering D-6 18
Resistor - Blower (Att) F-6 16 Switch - Stop Lamp H-11 36B
Resistor - Panel Dimmer I-3 A Switch - Stop Lamp (776 Only) H-11 36B
Resistor - Starter (2) B-4, B-5 4 Switch - Supplemental Steering I-4 A
Sender - Brake Oil B-8 20 Switch - System Test/Disable/Manual I-4 A
Sender - Coolant B-4 21 Switch - Thermostat F-6 16
Sender - Left Wheel Speed A-12 23 Switch - Traction Aid Test E-2 A
Sender - Right Wheel Speed A-12 24 Switch - Transmission B-10 29
Sender - Transmission Speed B-11 22 Switch - Turn G-4 A
Sensor-Coolant B-4 21 Switch-XMSN Filter B-8 16
Sensor - Oil Pressure C-1 38 Switch - XMSN Oil B-8 41
Sensor - Strut (Left Front) C-2 25 Tachograph G-6 D
Sensor - Strut (Left Rear) A-10 26 Tachometer G-3 A
Sensor - Strut (Right Front) C-2 27 Transmission Gear Indicator G-9 A
Sensor - Strut (Right Rear) A-10 28 XMSN Speed Distributor I-5 10B
Service Meter I-5 D
Machine location are repeated for components located close together
A = Operator Compartment - Front Dash
B = Operator Compartment - Rear Console
C = Operator Compartment
D = Operator Compartment - Behind Operator Compartment
Connector Location
Connector Number
Schematic
Location
Machine
Location
CONN 1 B-11 22
CONN 2 C-11 42
CONN 3 C-12 43C
CONN 4 Customer Data F-11 D
CONN 5 C-10 44C
CONN 6 C-9 45C
CONN 7 C-9 46C
CONN 8 F-10 47B
CONN 9 I-8 48B
CONN 10 F-8 49
CONN 11 Diagnostic Connector I-6 D
CONN 12 B-5 4
CONN 13 B-4 38
CONN 14 C-4 50C
CONN 15 C-5 51
CONN 16 C-5 52
CONN 17 F-3 A
CONN 18 G-3 A
CONN 19 B-10 29
CONN 20 F-5 A
CONN 21 F-1 53
CONN 22 B-2 4
CONN 23 B-2 54
CONN 24 W/O Payload Monitor I-8 48B
CONN 25 W/O Traction Aid D-8 51
CONN 26 D-8 55B
CONN 27 B-5 4
CONN 28 C-4 55B
The connectors shown in this chart are for harness to harness connectors.
component. See the Component Location Chart.
Ether Control Detected Problems ¹
Fault
Code
Fault Type ² Fault Description
01
Critical
Harness code - invalid
11
Critical ³
Sol #1 - short to + BAT
12
Noncritical
Sol #1 - open circuit
13
Noncritical
Sol #1 - short to GND
16
Noncritical
Warning lamp #1 - short to + BAT
17
Noncritical
Warning lamp #1 - open circuit
18
Noncritical
Warning lamp #1 - short to GND
21
Critical ³
Sol #2 - short to +BAT
22
Noncritical
Sol #2 - open circuit
23
Noncritical
Sol #2- short to GND
26
Noncritical
Warning lamp #2 - short to + BAT
27
Noncritical
Warning lamp #2 - open circuit
28
Noncritical
Warning lamp #2 - short to GND
314
Critical ³
Sol #3 - short to +BAT
324
Noncritical
501 #3 - open circuit
334
Noncritical
Sol #3 - short to GND
36
Noncritical
Warning alarm - short to + BAT
37
Noncritical
Warning alarm - open circuit
38
Noncritical
Warning alarm - short to GND
414
Critical ³
Sol #4 - short to + BAT
424
Noncritical
501 #4 - open circuit
434
Noncritical
Sol #4 - short to GND
51
Critical
Temp sensor - short to + BAT or open circuit
52
Critical
Temp sensor - out of range
53
Critical
Temp sensor - short to GND
54
Critical
Sensor supply - overvoltage
55
Critical
Sensor supply - undervoltage
56
Noncritical
System - overvoltage
57
Noncritical
System - undervoltage
61
Noncritical
Oil press sensor - short to + BAT or open circuit
62
Noncritical
Oil press sensor - out of range
63
Noncritical
Oil press sensor - short to GND
71
Noncritical
Oil press warning output - short to + BAT
72
Noncritical
Oil press warning output - open circuit
73
Noncritical
Oil press warning output - short to GND
94
Critical
Speed sensor - short to +BAT or open circuit
95
Critical
Speed sensor - out of range
96
Critical
Speed sensor - short to GND
99
Critical
Non-volatile memory fault
¹ The ether system must be in the automatic mode and the red fault LED is ON.
² Noncritical fault: the system continues to operate; the warning lamps alternately flash at 3.0 Hz.Critical
fault: if possible, ether injection is disabled; the warning lamps alternately flash at 3.0 Hz; the alarm
beeps during the ether injection time.
³ The alarm beeps all the time when the key switch is ON.
4 3516 engines only.
Related Electrical Service Manuals
Form Number
Actual Gear Indaicator SENR4252
Alternator:
Delco Remy
Bosch
Nippondenso
SENR7507
SENR2082
SENR4130
Automatic Electronic Traction Aid SENR2986
Automatic Ether Injection System SENR4705
Electronic Monitoring System SENR2945
Electonic Neutral Start Control SENR3889
Engine Overspeed Indicator SENR4263
Power Train SENR3143
Starting And Charging Systems SENR2947
Starting Motor 1W-6363 SENR3860
Truck Payload Measurement System SENR4733
Title
Mode Of Operation Mode Number
Normal 0
Model Setting 1
Units 2
Max Target Weight 3
Truck ID Code 4
Options 5
Calibration 6
Status/Diagnostics 7
TPMS Display Mode
Truck Payload Measurement System (TPMS)
Fault Circuit Description
F01
Suspension cylinder charge
F02
Suspension cylinder charge
F03
Suspension cylinder charge
F04
Suspension cylinder charge
F05
Left front suspension cylinder pressure sensor circuit
F06
Right front suspension cylinder pressure sensor circuit
F07
Left rear suspension cylinder pressure sensor circuit
F08
Right rear suspension cylinder pressure sensor circuit
F09
Batt backup/real time clock setting
F10
System setting/memory
F13
Green light open circuit or ground short circuit
F14
Green light + battery short circuit
F15
Red light open circuit or ground short circuit
F16
Red light + battery short circuit
Resistor, Sender and Solenoid Specifications
Part No. Component Description Resistance (Ohms)¹
2G-0413 Resistor - Blower Motor Speed 5.0
3T-3437 Resistor - Panel Dimmer 10.0 ± 0.1
6T-2217 Resistor - Starter/Diagnostic Conn 150 ± 7.5
9G-9988 Solenoid - Four way 24.9
5T-4434 Solenoid - Air Start 42.0 ± 4.0
6T-9290 Solenoids - Down Shift, Up Shift, Lockup 26.0 ± .2
7W-5967 Solenoid - Engine Shutdown 44.7 ± 4.5
9X-7137 Solenoid - Start Aid . 3.3 ± 1
3T-0062 Solenoid - Proportional 16.0
¹ At room temperature unless otherwise noted.
Off Machine Switch Specification
Part No. Function Actuate Deactuate Contact Position
3L-6306
Service/Retarder Press (Traction Aid)
Service/Retarder Press (Transmission)
55.2 ± 13.8 kPa
(8 ± 2 psi)
-
-
Normally Closed
3T-3195
Parking Brake Press (EMS)
Secondary Brake Press (Trans)
656 ± 35 kPa
(95 ± 5 psi)
552 ± 35 kPa
(80 ± 5 psi)
Normally Open
6T-7663 Engine Oil Pressure
93 ± 20.8 kPa
(13.5 ± 3.0 psi)
68.9 ± 20.8 kPa
(10.0 ± 3.0 psi)
Normally Open
7N-4447
Fuel Filter Press (EMS)
Torque Converter Inlet Filter (EMS)
119 ± 14 kPa
(17.0 ± 2.0 psi)
-
-
Normally Closed
7N-7854
Brake Oil Temp (EMS)
Converter/Retarder Temp (EMS)
123.9 ± 2.8°C
(255 ± 9°F)
112.8°C MIN
(235°F MIN)
Normally Closed
7N-9785 Engine Coolant Temp (EMS)
107.2 ± 2.8°C
(225 ± 5°F)
93.0°C MIN
(200°F MIN)
Normally Closed
8N-1425 Aftercooler Temperature (EMS)
82.2 ± 2.8°C
(180 ± 9°F)
74 °C MIN
(165 °F MIN)
Normally Closed
9D-6888 A/C Low Pressure
234 kPa MAX
(34 psi MAX)
152 kPa MIN
(22 psi MIN)
Normally Open
9G-3341 Power Train 0IL Temperature (EMS)
51.7 ± 2.8°C
(125 ± 5°F)
43.0°C MIN
(110°F MIN)
Normally Closed
9G-8009 Brake Air Pressure (EMS)
517 ± 35 kPa
(75.0 ± 5.0 psi)
448 ± 35 kPa
(65.0 ± 5.0 psi)
Normally Open
9W-3187 Fuel Pressure (EMS)
93 ± 21 kPa
(13.5 ± 3.0 psi)
69 ± 21 kPa
(10.0 ± 3.0 psi)
Normally Closed
9X-1159 Primary Steering Flow (EMS)
4 grams
(.14oz)
1.5 grams
(.05oz)
Normally Open
9X-3040 Engine Coolant Flow (EMS)
362 ± 29 mN (45.6mm ID point)
(1.3 ± .1 oz, 1.8 in ID point)
303 mN MIN
(1.1 oz MIN)
Normally Open
9X-3040 Engine Coolant Flow (EMS)
362 ± 29 mN (45.6 mm ID point)
(1.3 ± .1 oz, 1.8 in ID point)
303 mN MIN
(1.1 oz MIN)
Normally Open
Wire Description
Wire
Number
Wire
Color
Description
Wire
Number
Wire
Color
Description
Power Circuits
Accessory Circuits (Continued)
101 RD Bat (+) 517 BU Blower Motor (Low)
102 BU Hd Lmp 519 PK Thermostat to Refrigerant Press. Sw
103 YL Aux Ckt 520 WH Opr A/C Sw to Thermostat/Fuse
105 BR Key Sw 537 GN Turn Signal Sw to Flasher
107 WH Eng Shutdown 539 BU Turn Signal Indicator Basic/Right
109 OR Alt Output (+) Term 540 WH Turn Signal Indicator Left
121 YL Back Alarm to Lamp
Lighting Circuits
122 BU AuxCkt 600 BR Dash Lamp Basic
123 WH Aux Ckt 602 WH Dome Lamp
124 GN A/C 604 OR Stop Lamp
132 PK Aeta Ctrl 605 YL Turn Lamp - Left
137 OR Suppl Ster Motor Fuse 606 GY Turn Lamp - Right
138 GN Auto Lube Pump to Payload Mon 610 OR Head Lamp Basic
139 OR Aux Ckt 611 PU Head Lamp Hi
141 PK Aux Ckt 614 PU Park/T ail/Dash/Lamp
Ground Circuits
635 BU Payload Mon Red Lamp
200 BK Main Chassis 636 GN Payload Mon Green Lamp
201 BK Operator Monitor Return 639 WH Left Hand Stop/Tail Lamp
202 BK XMSN Ctrl 640 GN Right Hand Stop/Tail Lamp
203 BK Chassis Diagnostic
Control Circuits
205 BK Instr 700 PK AETA Test Sw
206 BK Bat Side of Disconnect 703 BU XMSN Up Sol
207 BK Starter Diagnostic 704 GY XMSN Down Sol
212 BK AETA Coding Pin 16 705 PK XMSN Lockup Clutch Sol Basic
213 BK AETA Coding Pin 17 706 BR XMSN Retarder Sw
216 BK AETA Coding Pin 20 707 PU XMSN Bed Raise Sw
217 BK XMSN Id Code 2 709 OR Sensor Power Supply
218 BK XMSN Id Code 1 710 GN XMSN Speed Pickup Signal
219 BK XMSN Id Code 0 711 BR XMSN Lever Code 1
226 BK Hyd Oil Temp Sensor 712 WH XMSN Lever Code 2
227 BK XMSN Id Code 3 713 OR XMSN Lever Code 3
231 BK XMSN Sw 714 YL XMSN Lever Code 4
237 BK Ether Ctrl Gnd 715 GN XMSN Lever Code 5
245 BK Ether Ctrl Harness Code 0 716 BU XMSN Lever Code 6
246 BK Ether Ctrl Harness Code 1 720 PU XMSN Brake Sw
247 BK Ether Ctrl Harness Code 2 721 BR XMSN Gear Code 1
248 BK Ether Ctrl Harness Code 3 722 WH XMSN Gear Code 2
250 BK Payload Mon - Customer Gnd 723 OR XMSN Gear Code 3
251 BK Payload Mon - System Gnd 724 YL XMSN Gear Code 4
Basic Machine Circuits
725 GN XMSN Gear Code 5
302 OR Starter No.1 Resistor to Diagnostic 726 BU XMSN Gear Code 6
304 WH Starter Relay No.1 Output 727 GN Suppl Ster Motor Relay
306 GN Starter Relay Coil to Neut Start Sw or Key Sw 728 BU Suppl Ster Cont Sw
307 OR Key Sw to Neut Start Sw 733 BR Switching Gear Code 1 Front
308 YL Main Power Relay Coil 734 WH Switching Gear Code 2 Front
310 PU Start Aid Sw to Start Aid Sol 735 OR Switching Gear Code 3 Front
311 WH Start Aid Sol to Temp Sw 736 YL Switching Gear Code 4 Front
313 GY Starter No.2 Resistor to Diagnostic 737 GN Switching Gear Code 5 Front
314 PU Starter Relay No.2 Output 767 WH AETA Pickup Power
321 BR Bckp Alarm Lamp Travel Alarm 768 OR AETA Pickup XMSN
326 PU Key Sw "C" Term. 769 BU Wheel Speed Pickup Left
327 PK Shutdown Sol 770 GN Wheel Speed Pickup Right
334 BU Start Aid Sol #2 772 BR AET A Retarder Sw
Monitoring Circuits
773 GY AET A Servovalve
400 GN Service Meter Sw 774 YL AETA Sol- Left
403 GN Alternator (R) Term. 775 BR AETA Sol- Right
405 GY Opr Mon Oil Press. (Low Setting) 777 PU Brake Release Motor
406 PU Opr Mon Coolant Temp 794 YL Payload Mon XMSN Speed
407 PK Opr Mon Converter/Retarder Oil Temp 799 WH Sensor Power
408 WH Opr Mon System Air Press. A717 OR Start Aid Sensor Supply
409 OR Opr Mon Neut A718 PU Start Aid Coolant Sensor Signal
410 WH Opr Mon Action Alarm A720 PK Start Aid Eng Speed Signal
411 PK Opr Mon Master 818 BR Serial Data (Transmit)
412 BU Opr Mon Cool Flow 819 GY Serial Data (Receive)
413 BR Opr Mon Fuel Press. 820 BU Transmit Key
415 GN Opr Mon Test Sw 858 GY Payload Mon Right Front Sensor
417 GY Primary Ster Sw 859 YL Payload Mon Left Front Sensor
418 WH Opr Mon Oil Press. (Hi Setting) 860 PK Payload Mon Right Rear Sensor
419 YL Opr Mon Parking Brake 861 PU Payload Mon Left Rear Sensor
426 BR Opr Mon Power Train Oil Filter 863 BU Payload Mon Transmit Lcd Out
437 BR Opr Mon Fuel Level to Fuel Filter Jumper 864 BR Payload Mon Clock Lcd Out
438 YL Opr Mon Coolant Temp Jumper 865 GY Payload Mon Latch Lcd Out
441 OR Eng Coolant Temp Gage 866 PK Payload Mon Test/Set
446 PU Brake Oil Temp Gage 867 PU Payload Mon Mode
449 BU Spdom Sender (Signal No.1) 891 BU Neut Start Cont to Payload Mon System
450 YL Tach Sender(+) 918 OR Eng Overspeed Light and Horn
451 BR Tach Sender (-) 919 GN Eng Overspeed Test Sw
454 GN Retarder Indicator Lamp B922 WH (NFND) Start Aid Lamp Reset Sw #1
470 PU Cane Sw Neut B923 YL (NFND) Start Aid Lamp Reset Sw #2
472 OR Parking Brake Sw to Overstroke Sw B941 GY (NFND) Start Aid Cont Sol 1 & 2 Ret
481 GN Converter TempSw to Brake OilTemp-Sw B943 PK (NFND) Start Aid Cont Lamp 1 Output
Accessory Circuits
B944 GN (NFND) Start Aid Cont Alarm Output
513 OR A/C Compressor/Refrigerant Pressure Sw B945 WH (NFND) Start Aid Cont Sensor 1
515 GY Blower Motor (Hi) B946 OR (NFND) Start Aid Cont Manual Input
B954 YL (NFND) Start Aid Cont Test Sw Input
B998 BU (NFND) Start Aid Cont Lamp 2 Output
A
3
4
5
6
8
9
10
11
12
14
15
13
16
B
C
D
1
2
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
37
35
33
34
36
38
7
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
A
3
4
5
11
12
14
15
13
16
B
C
D
B
1
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
37
35
33
34
38
C
39
40
41
42
49
51
52
53
54
Machine Harness Connector and Component Locations
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
Pressure
Symbol
Temperature
Symbol
Level
Symbol
Flow
Symbol
A AA
2
A AA
1
2
325-PK-14
C
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
Socket
Pin
Pin or Socket
Number
Wire, Cable, or Harness
Assembly Identification
Single Wire
Connector
Circuit Number
Identification
Wire
Gauge
Wire
Color
Plug
Receptacle
9X-1123
Component
Part Number
Electrical Schematic Symbols And Definitions
1
1
1
2
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.
1
1
D91395
SENR5665
January 1997
776B Wheel Tractor & 777B Truck
Electrical System
776B:
6JC98-UP
777B:
4YC1639-UP
21 11 01 9 8 7
6
5 4
3 2
1
H
G
I
C
B
A
F
E
D
21 11 01 9 8 7
6
5 4
3 2
1
F
E
D
C
B
A
G
I
H
3E3777
237-BK
A720-PK
A717-OR
MMM
LLL
NNN
ENGINE SPEED
PICKUP
6T4361
JJJ
308-YL
237-BK
JJJ
105-BR
105-BR
B923-YL
105-BR
B923-YL
JJJ
JJJ
334-BU
B941-GY
B941-GY
310-PU
SOLENOID 2
9X7137
SOLENOID 1
9X7137
4
5
3
2
1
JJJ
B922-WH
105-BR
B922-WH
2
1
2
HHH
A
RESET SW 1
3T3133
RESET SW 2
3T3133
405-GY
3
1
2
1
1
NNN
COOLANT
SENSOR
3E5370
237-BK
308-YL
A718-PU
2
237-BK
A717-OR
A720-PK
GROUND
V+
HHH
SIGNAL
B
A
237-BK
C
248-BK
247-BK
246-BK
245-BK
BK
405-GY
405-GY
BK
237-BK
105-BR
B923-YL
B922-WH
B945-WH
334-BU
B941-GY
310-PU
A718-PU
308-YL
248-BK
247-BK
246-BK
245-BK
A720-PK
A717-OR
8
10
17
5
18
4
6
23
2
3
L34
B943-PK
B998-BU
237-BK
KKK
L34
L34
A718-PU
237-BK
B945-WH
237-BK
A718-PU
237-BK
YL
B945-WH
A717-OR
308-YL
2
1
3
4
2
1
14
1
16
20
24
B946-OR
B954-YL
1
2
BK
RD
105-BR
308-YL
B943-PK
B998-BU
B946-OR
B954-YL
B944-GN B944-GN
B923-YL
248-BK
247-BK
246-BK
245-BK
B922-WH
B945-WH
334-BU
B941-GY
310-PU
A720-PK
A717-OR
A718-PU
307-OR
308-YL
B943-PK
B998-BU
237-BK
B946-OR
B954-YL
B944-GN
G
F
L
b
c
d
RESET SW4
RESET SW 3
RESET SW 2
CODE 0
CODE 1
CODE 2
CODE 3
ENG OIL PRESS.
SENSOR 2
RESET SW 1
6
SOL 2
SOL RET 1&2
SOL 1
ENG SPD
SENSOR #V
SOL 3
SOL 4
COOL TEMP
START
BATTERY
OUT LAMP 1
OUT LAMP 2
SPARE
GROUND
MANUAL
TEST SW
OUT HORN
e
D
C
K
CAT LINK
A
J
CAT LINK
O
a
I
W
U
E
H
T
M
V
R
P
S
B
N
5
X
Y
Z
310-PU
311-WH
2
1
12
5
4
C
3
2
1
22
21
19
15
13
11
OPERATOR STATION
123-WH
611-PU-14
610-OR-14
107-WH-14
L5
L33
L9
308-YL
124-GN-14
308-YL
123-WH
3
307-OR
308-YL
L18
537-GN
308-YL
124-GN-14
107-WH-14
307-OR
454-GN
405-GY
123-WH
200-BK
200-BK
450-YL
L32
BASE
3T0304
ENGINE OVERSPEED
TEST SWITCH
9D3721
ENGINE
OVERSPEED
WARNING LAMP
OPERATOR STATION
LAMP
7N1996
200-BK
ENGINE
OVERSPEED
ALARM
9G9813
RD
BK
2
1
TEST SW
ENG OIL PR
ID CODE
WARNING
+ BATTERY
GROUND
ENG SPEED
919-GN
405-GY
L30
200-BK
918-OR
123-WH
200-BK
450-YL
6
1
2
5
8
7
4
3
3
1
2
4
5
6
7
8
918-OR
200-BK
WH
OR
YL
GN
BK
BU
PK
BR
RD
OR
YL
GN
BU
PU
GY
200-BK
138-GN
L28
L30
861-PU
860-PK
858-GY
859-YL
L29
799-WH
635-BU
636-GN
BBB
799-WH
PAYLOAD MONITOR
OPERATOR PANEL
9X6847
MODE
TEST/SET
LCD LATCH
LCD CLOCK
TX LCD OUT
GROUND
+24V (OUT)
+ BATTERY
PU-18
PK-18
GY-18
8
7
6
BR-18
5
4
3
1
2
BU-18
DDD
BK-18
WH-18
GN-18
L31
138-GN
799-WH
251-BK
863-BU
864-BR
865-GY
866-PK
867-PU
L31
BBB
EEE
EEE
GGG
635-BU
636-GN
858-GY
859-YL
861-PU
860-PK
799-WH
799-WH
863-BU
864-BR
865-GY
866-PK
867-PU
251-BK
DDD
799-WH
251-BK
861-PU
860-PK 4
3
2
1
DDD
635-BU
636-GN
799-WH
858-GY
859-YL
251-BK
1
5
6
4
3
2
251-BK
859-YL
799-WH
251-BK
858-GY
799-WH
799-WH
799-WH
636-GN
635-BU
LEFT FRONT
STRUT SENSOR
9W3352
+V
3
2
1
GROUND
799-WH
EEE
1
2 635-BU
636-GN 2
1
EEE
799-WH
RD
BK
RD
BK
PAYLOAD
MONITOR
GREEN LAMP
8T9684
BULB
8T9749
PAYLOAD
MONITOR
RED LAMP
8T9683
BULB
8T9749
RIGHT FRONT
STRUT SENSOR
9W3352
SIGNAL
GROUND
+V
1 799-WHGN-18
GN-18
1
2
C
C
2
1
ENGINE
SPEED
PICK-UP
9X5393
450-YL
451-BR
RD
201-BK
201-BK
GROUND
SIGNAL
V+
B
C
A
NNN
OIL PRESSURE
SENSOR
3E3530
JJ
AUX START
RECEPTACLE
BK-00
RD-00
400-GN
ZZZ
ENGINE
OIL SW
6T7663
BK-0
BK-0
201-BK
200-BK-10
858-GY
NNN
TO CAB
AETA MTG
BRACKET
BK-14
JJJ
PPP
7
3
A720-PK
2
EEE
GY-18
YL-18
405-GY
A
OIL PRESS. SIG
105-BR
308-YL
HHH
251-BK
AAA
Y
728-BU
200-BK-10
109-OR-8
109-OR-10
109-OR-10
ENG SHUTDOWN & SUPPL STER
BREAKER 6N8589
109-OR-10
109-OR-8
109-OR-8
109-OR-12
HEAD LAMP BREAKER
3T2662
109-OR-8
BRAKE RETRACT
BREAKER
3T8728
20A
139-OR-10
BU BU
2
1
313-GY
313-GY
BK
BK
GN
GN
GN
GN
C
C
438-YL
201-BK
L10
L11
L12
L12
L14
TRACTION AID
SS
SS
PP
105-BR
101-RD
109-OR
ALTERNATOR BREAKER
9S0174
PARK,STOP &
TAIL LAMP BREAKER
9G9882
Y
60A
15A
10A
10A
15A
15A
BLOWER MOTOR
BREAKER
6N8589
KEY
BREAKER
9G9487
103-YL
103-YL
105-BR
107-WH-14
107-WH-14
101-RD-6
102-BU-14
124-GN-14
109-OR-6
ENGINE OVERSPEED
MONITOR 7T3821
304-WH
306-GN
314-PU
L32
201-BK
306-GN
251-BK
207-BK
302-OR
311-WH
SPARE
109-OR-12
121-YL
141-PK
123-WH
123-WH
122-BU
132-PK
138-GN-14
FUSE
3K8782
10A
10A
10A
10A
10A
10A
AIR DRYER
SUPPL STER, SERVICE METER & DIST PICKUP
DOME LAMP & AUX HEATER
BACKUP ALARM
109-OR-12
109-OR-12
109-OR-12
109-OR-12
109-OR-12
RESISTOR
6T2217
RESISTOR
6T2217
302-OR
304-WH
OR
WH
OR
314-PU
200-BK
306-GN
306-GN
2
1
3
4
5
200-BK
306-GN
2
1
3
4
5
WH
12V BATTERY
9G2648
12V BATTERY
9G2648
SUPPL
STEERING
2G5515
CC AA
BK-0
BK-00
BK-00
NEGPOS
2
1 1
2
BK-6
°T
BK
STARTER
1W6363
STARTER
1W6363
137-RD-12
FUSE
3K8782
10A
12V BATTERY
9G2648
12V BATTERY
9G2648
H H
CC
NN
NN
PP
FF
MM
LL
YY
KK
HH
GG
V
EE DDCC BB
C
BK-0
RD-0
RD-0
RD-0
RD-0
RD-0
RD-10
RD-10
WH/BK-10
WH/BK-10
BK-000
STEERING
MOTOR
RELAY
3E0154
START RELAY
9F3099
START
RELAY
9F3099
101-RD-6101-RD-6
137-RD 137-RD
727-GN727-GN
TO ENG
BLOCK
TO
FRAME
137-RD
101-RD-6
727-GN
RD-00
STEERING SW
9X1159
AIR DRYER
2G2159
201-BK
728-BU 2
1 BK-18
BK-18
122-BU
RD-00
RD-00
BK-00
BK-00
RD-00
BK-00
G S
MTRBAT
MOTOR
G S
MTRBAT
MOTOR
MOTOR
NEGPOSNEGPOSNEGPOS
539-BU
614-PU
611-PU-14
610-OR-14
PARK-TURN
LAMP
3T3967
BR
RD
S
T
T
2
1
LOW BEAM
HEAD LAMP
8C5373
HI BEAM
HEAD LAMP
9W0052
540-WH540-WH
614-PU614-PU
611-PU-14
610-OR-14
611-PU-14
610-OR-14
3
2
4
1
207-BK
L29
L32
BRAKE
RETRACT SW
9D3721
454-GN
139-OR-10 777-PU-10
777-PU-10
307-OR
307-OR
302-OR
304-WH
200-BK-14
USE W/O ELECTRIC STARTERS, CONNECTS TO
5 PIN CONNECTOR OF HARNESS C AT B-6 SH 3
W
W
C
BK
GN
2
1
306-GN
306-GN
200-BK
4
5
3
1
2
AIR START
SOLENOID
5T4434
306-GN
306-GN
306-GN
306-GN
200-BK
2
3
4
5
6
1 122-BU-14
COOLANT SW
9X3040
FUEL
FILTER SW
7N4447
L2
L2
L9
L9
L5
L5
AAA
L11
L10
201-BK
+ BATTERY
GROUND
ENG SOL
RESET
OFF (KEY)
RD
BK
YL
WH
OR 7
BU
6
5
4
3
2
1
C
TRACTION AID
TEST SW 4D1836
326-PU
ENGINE SHUTDOWN
CONTROL 9G9287
103-YL
SIGNAL
V+
GROUND B
A
B945-WH
RETARDER
INDICATOR
LAMP
7N5876
KEY
START SW
9G7641
308-YL
308-YL
326-PU
105-BR
L33
L18
105-BR
ST
ON
OFF
B
S
C
R
OPERATOR STATION
32
1
767-WH
700-PK
105-BR
101-RD
109-OR
A
FLASHER 8D6946
L32
109-OR-6
101-RD-6
121-YL
122-BU
103-YL
138-GN-14
308-YL
105-BR
308-YL
141-PK
102-BU-14
123-WH
132-PK
103-YL
L33
200-BK
327-PK-14
107-WH-14
537-GN
BK-8
200-BK-14
9
201-BK
418-WH
405-GY
400-GN
201-BK
201-BK
201-BK
513-OR-14
AIR
CONDITIONER
CLUTCH
SOLENOID
7N4297
REFRIGERANT SW
(NOTE A)
9D6888
519-PK-14
GN-18
7
311-WH
GN-18
200-BK
FUEL SW
9W3187
PK-18
BK-18
ALTERNATOR
5S9088
ENGINE
SHUTDOWN
SOLENOID
7W5967
TO
ENGINE
BLOCK
200-BK-14
513-OR-14
BK
BK
TT
C
C
C
UU
438-YL
201-BK
COOLANT SW
7N9785
COOLANT
SENDER
6N5926
437-BR
413-BR
406-PU
413-BR
406-PU
310-PU
327-PK-14
441-OR
441-OR
°T
412-BU
109-OR-6
226-BK
403-GN
513-OR-14 2
1 327-PK-14
JJJ
HHH
105-BR
307-OR
237-BK
412-BU
201-BK 2
1
2
1
226-BK
403-GN
109-OR-6
°T
C
308-YL
ALT
+
R
PARK-TURN
LAMP
3T3967
BR
RD
U
U
S
2
1
LOW BEAM
HEAD LAMP
8C5373
HI BEAM
HEAD LAMP
9W0052
539-BU
614-PU
539-BU
614-PU
611-PU-14
610-OR-14
3
2
4
1
611-PU-14
610-OR-14
307-OR
START AID BOTTLE
START AID BOTTLE
START AID
START AID
GAUGE
251-BK
859-YL
GY-18
SIGNAL
799-WH
GN-18
YL-18
ETHER CONTROL
CONN 25
CONN 15
CONN 16
CONN 14
CONN 12
CONN 13
CONN 22
CONN 23
CONN 27
CONN 28
405-GY
RH STOP/TAIL LAMP
STOP/TAIL LAMP
MODULE
7X1670
640-GN
639-WH
614-PU
604-OR
4
3
2
1
GN
WH
PU
OR
LH STOP/TAIL LAMP
OPERATOR STATION
OPERATOR STATION
L37
767-WH
202-BK
710-GN
200-BK
BK-00
BK-00
L25
L23
L19
FRAME
GROUND
BK-4
CCC
CAB
GROUND
202-BK
202-BK
202-BK
L31 L31
L31
YL-18
GY-18
GN-18+V
GROUND
SIGNAL
LEFT REAR
STRUT SENSOR
9W3352
GGG
861-PU
251-BK
799-WH1
2
3
3
2
1
861-PU
860-PK
251-BK
799-WH799-WH
251-BK
860-PK
GGG
RIGHT REAR
STRUT SENSOR
9W3352
SIGNAL
GROUND
+V GN-18
GY-18
L36
L35
YL-18
472-OR
CB
1
2
446-PU-14
481-GN
446-PU-14
481-GN
481-GN
201-BK
T °
419-YL
472-OR
BRAKE MASTER
CYLINDER
OVERSTROKE SW
7V5647
419-YL
472-OR
8450-YL 450-YL
451-BR 9 451-BR
MAIN LAMP SW
BRAKE SW
419-YL
450-YL
451-BR
451-BR
450-YL
L14
L12
L11
472-OR
20
B
15
2
19
1
8
13
11
728-BU 7728-BU
201-BK
BC
777-PU-10 777-PU-10
777-PU-10
777-PU-10
TRANSMISSION SW
6V5828
GEAR 1
GEAR 2
GEAR 3
GEAR 4
GEAR 5
GND VERIFY
GROUND
10
9
8
7
6
5
4
3
2
1
313-GY
304-WH
306-GN
314-PU
302-OR
311-WH
207-BK
313-GY
CB
304-WH
306-GN
314-PU
6
4
5
3
2
1
302-OR
311-WH
L7
L9
L3
L10
202-BK
767-WH
L10
L11
L12
L16
L16
L15
L14
L14
LOCK UP
SOLENOID
6T9290
DOWN SHIFT
SOLENOID
6T9290
UP SHIFT
SOLENOID
6T9290
PARKING
BRAKE SW
3T3195
412-BU
310-PU
BRAKE
AIR SW
9G8009
PROPORTIONAL
SOLENOID
3T0062
202-BK
767-WH
202-BK
770-GN
767-WH
769-BU
E
F
D
H
BR-18
WH-18
OR-18
YL-18
GN-18
BU-18
BK-18 231-BK
XX
XX E
K
J
A
B
C
G
721-BR
722-WH
723-OR
724-YL
725-GN
726-BU
437-BR
201-BK
201-BK
408-WH
419-YL
201-BK
407-PK
419-YL
137-RD
441-OR
727-GN
446-PU
606-GY
614-PU
605-YL
121-YL
138-GN-14
426-BR
728-BU
122-BU
226-BK
418-WH
412-BU
406-PU
413-BR
306-GN
101-RD-6
109-OR-6
403-GN
327-PK-14122-BU-14 122-BU-1411
122-BU-14
418-WH
418-WH
513-OR-14
513-OR-14
C
A
407-PK407-PK
446-PU-14 446-PU-14
727-GN
137-RD
101-RD-6
400-GN
405-GY
201-BK
306-GN
437-BR
413-BR
406-PU
441-OR
327-PK-14
403-GN
109-OR-6
226-BK
226-BK
400-GN
201-BK
137-RD
441-OR
310-PU
727-GN
405-GY
412-BU
406-PU
413-BR
437-BR
327-PK-14
306-GN
403-GN
101-RD-6
109-OR-6
226-BK
418-WH
306-GN
101-RD-6
109-OR-6
403-GN
327-PK-14
513-OR-14
400-GN
201-BK
137-RD
441-OR
727-GN
412-BU
406-PU
413-BR
437-BR
24
22
9
1
3
4
6
20
19
14
7
13
23
12
18
8
5
21
17
25
15
10
16
2
B
A
207-BK207-BK
302-OR 302-OR
313-GY313-GY
314-PU 314-PU
304-WH304-WH
311-WH311-WH
306-GN306-GN
450-YL
728-BU
201-BK
426-BR
604-OR
122-BU
426-BR
604-OR
122-BU
728-BU
201-BK
451-BR
472-OR
606-GY
614-PU
605-YL
321-BR
16
18
17
5
7
6
4
3
9
10
12
14
LR
202-BK
767-WH
202-BK
6
4
5
3
2
4
1
WH
BK
WH
BK
3
1
2
WH
BK
E
G G
G
Q
Q
Q
202-BK
1
3
2
GROUND
SIGNAL
+V
C
B
A
GROUND
SIGNAL
+V
C
B
A
TRANSMISSION
SPEED SENDER
9X7000
GROUND
SIGNAL
+V
C
B
A
4-WAY
SOLENOID
9G9988
RIGHT WHEEL
SPEED SENDER
3T2469
LEFT WHEEL
SPEED SENDER
3T2469
770-GN
769-BU
767-WH
767-WH
202-BK
202-BK
770-GN
767-WH
769-BU
773-GY
775-BR
774-YL
202-BK
773-GY
775-BR
202-BK
202-BK
774-YL
705-PK
704-GY
703-BU
710-GN
709-OR
202-BK
710-GN
709-OR
705-PK
202-BK
E
202-BK
2
1BK
BK
704-GY
202-BK
E
2
1BK
BK
703-BU
202-BK
E
2
1BK
BK
STOP/
TAIL
LAMP
7X6219
STOP/
TAIL
LAMP
7X6219
TURN
LAMP
3T3968
TURN
LAMP
3T3968
BACKUP
LAMP
8C5582
BACKUP
ALARM
3T1815
606-GY
614-PU
605-YL
321-BR
640-GN
606-GY
200-BK
639-WH
605-YL
321-BR
321-BR
321-BR
S
S
L24
438-YL
14
4
L18
202-BK
216-BK
14
19
20
18
ID CODE 3
ID CODE 4
ID CODE 1
ID CODE 0
PROPN SOL
+ 12V
9
8
BRAKE
TEST
RIGHT SP
LEFT SP
XMSN SP
GROUND
RIGHT SOL
LEFT SOL
+ BATTERY
11
17
16
15
13
12
10
7
6
5
4
3
2
1
BRAKE RETRACT
5T1060
777-PU-10
200-BK-10
MOTOR
L16
L15
W/O
TRACTION
AID USE
HARNESS F
767-WH
700-PK
4
5
FA
202-BK
132-PK
768-OR 3
2
1
BK
TRACTION AID
CONTROL
3T0529
5 700-PK
767-WH
700-PK
767-WH767-WH
700-PK700-PK
4
K
K
A
202-BK
132-PK
768-OR 3
2
1
202-BK
132-PK
768-OR
202-BK
767-WH
772-BR
769-BU
770-GN
775-BR
774-YL
773-GY
212-BK
213-BK
122-BU
CONVERTER SW
7N7854
201-BK
°T
407-PK
XMSN OIL SW
9G3341
XMSN
FILTER SW
3E7868
BRAKE OIL
SENDER
8N3844
AFTERCOOLER SW
8N1425
201-BK
438-YL
BRAKE OIL
TEMP SW
7N7854
446-PU-14
°T
426-BR
201-BK
201-BK
°T
L23
L19
L24
122-BU
426-BR
481-GN
L22
BK-0
BK-0
°
T
767-WH767-WH
ID CODE 2
202-BK
202-BK
K
202-BK231-BK
KK
RR
RR
G
E
D
BK-0
BK-0
BK-000 BK-00
BK-00
202-BK
773-GY
774-YL
775-BR
770-GN
769-BU
767-WH
212-BK
216-BK
213-BK
773-GY
774-YL
775-BR
770-GN
769-BU
767-WH
11
3
8
1
9
2
10
12
13
7
6
5
8
7
6
5
4
3
2
1
9
17
14
13
19
15
12
10
20
18
11
16
726-BU
725-GN
724-YL
723-OR
722-WH
721-BR
704-GY
703-BU
709-OR
705-PK
202-BK
710-GN
217-BK
218-BK
726-BU
725-GN
724-YL
723-OR
722-WH
721-BR
219-BK
227-BK
704-GY
703-BU
709-OR
705-PK
202-BK
710-GN
426-BR
CONN 1
CONN 19
CONN 5
CONN 3
CONN 2
CONN 6
CONN 7
CONN 26
CONN 27
237-BK
237-BK
B998-BU
B943-PK
237-BK
NNN
8X5014
MMM
8X5013LLL
8X8382
KKK
8X8385NNN
8X8384JJJ
237-BK
SYSTEM TEST/
DISABLE/
MANUAL SW
9X5713
237-BK
B946-OR
B954-YL
3
2
1
9G9813
237-BK
B944-GN
BK
OR 1
2
237-BK
237-BK
L32
251-BK
251-BK
251-BK
CCC 7G1060
A-6
FFF 8W8354
1
7I5521
8W7711
8W7713
8W8267
GGG
EEE
DDD
BBB
8X8383HHH
BBB
L2
-
+
LAMP
7N5876
SIG
TACHOMETER
8C5471
123-WH
205-BK
L32
611-PU-14
L6
537-GN
201-BK
L18
799-WH
635-BU
308-YL
307-OR
BK
RD
1
2
DDD
799-WH
636-GN
DDD
2
1
RD
BK
PAYLOAD
MONITOR
GREEN LAMP
8T9684
BULB
8T9749
PAYLOAD
MONITOR
RED LAMP
8T9683
BULB
8T9749
308-YL
727-GN
728-BU
417-GY
403-GN
107-WH-14
L9
B-5
A-2
C-1
E-1
E-1
1
1
1
1
1
1
L26
308-YL
124-GN-14
L25
123-WH
307-OR
450-YL
451-BR
200-BK
1
4
3
2
A
5
405-GY
R
450-YL
451-BR 205-BK
450-YL
1
2
A
308-YL
8W1197AAA
8W1196
8W6419
8W1578
8W8268
7T3418
5T9182
5T5140
8X8380
5T9181
9G0549
6G0512
5H0837
6G0783
3T0782
3T0781
8X0486
SS
CIRCUIT GROUPING
DESIGNATION
#L
ATCH WIRE, CABLE,
COMPONENT
CIRCUIT NOT CONNECTED
CIRCUIT CONNECTED
BLUE
GREEN
BU
GN
RD
WH
OR
YL
PK
BK
BLADE, SPADE, RING,
OR SCREW TERMINAL
INTERNAL ELECTRICAL
CONNECTION TO SURFACE
OF COMPONENT
ELECTRICAL CONNECTION
CONNECTOR
SYMBOL DESCRIPTION
BROWN
PURPLE
GRAY
BLACK
COLORABBREV
PINK
YELLOW
ORANGE
WHITE
RED
BR
PU
GY
WW
M
NOTE B: NORMALLY CLOSED WHEN DOOR OPEN
5T4605
7N3850
5T5141
5T3943
QQ
WIRE AS.
Q
BK-00
BK-00
L23
L22
SH
COMPONENTS ARE SHOWN INSTALLED ON A FULLY
OPERABLE MACHINE WITH THE KEY OFF
9D3437RR
2P9082PP
2P9081NN
6S1060MM
6S1061LL
2G5786KK
JJ
2G4177HH
5T2081GG
5T2083FF
5T2080EE
5T2079DD
CC
5T2082BB
5T2078AA
CABLE AS.
ZZ
9F4337YY
XX
VV
UU
9G9172TT
8P6778Z
Y
W
8D8999V
6G9746U
6G9745T
6G9747S
5T1308R
6G9462P
6G1105N
M
5T1660L
K
5T1949H
G
F
E
D
8W8222C
8X2289B
A
HARNESS AS.
LOCIDENT PART NO.
NOTE A: NORMALLY OPEN BEFORE REFRIGERANT CHARGE
UNLESS OTHERWISE SPECIFIED ALL WIRE TO BE 16 GAUGE
L18
537-GN
E-4
A-5
1
1
1
1
8X8337
ZZZ
L30
L30
123-WH
L6
L1
L20
6G3017
XXX
BRAKE ON
NEUTRAL
COOL FLOW
ENG OIL PR
COOL TEMP
FUEL PR
TEST
LAMP
GROUND
ALARM
ALTERNATOR
PRIM STER
+ BATTERY
ALTERNATOR
ENG OIL PR
FUEL FILTER
CV/RTD TEMP
BK AIR PR
11
20
19
18
17
16
15
14
13
12
10
9
8
7
6
5
4
3
2
1
XMSN FILTER
DIAGNOSTIC CONNECTOR
A
132-PK
141-PK
200-BK
200-BK
308-YL
THERMOSTAT SW
2G0396
BLOWER
9G0397
BLOWER
9G0397
BLOWER
9G0397
RESISTOR
2G0413
RESISTOR
2G0413
RESISTOR
2G0413
OPERATOR
MONITOR
3T9200
3
2 1
6
54
3
21
6
54
3
21
5
4
21
A
20
19
18
17
16
15
203-BK
105-BR
207-BK
101-RD
109-OR
308-YL
308-YL
302-OR
314-PU
304-WH
311-WH
306-GN
10
3
5
1
9
12
8
7
2
13
14
4
11
6
513-OR-14
201-BK
400-GN
202-BK
132-PK
768-OR
TACHOGRAPH
7D1513
3
2
1
L17
205-BK
205-BK
124-GN-14
L9
203-BK
SERVICE METER
3T8325
TRACTN AID
XMSM SPEED
SPEEDOMETER
XMSM SPEED
DISTRIBUTOR
3T5438
DOOR
COURTESY
LAMP SW
(NOTE B)
9D4068
GY-18
GN-18
PK-18
OR-18
YL-18
BK-18
WH-18
+ BATTERY
GROUND
7
6
5
4
3
2
1
794-YL
202-BK
COURTESY
LAMP
7N5876
A
L A
2
1 141-PK141-PK
600-BR 600-BR
L6
L4
123-WH
606-GY
605-YL
L17
446-PU
441-OR
614-PU
137-RD
727-GN
600-BR
L33
200-BK200-BK
201-BK
768-OR
710-GN
123-WH
449-BU
202-BK
202-BK
710-GN
DISCONNECT SW
7N0718
2
1
BK
RD
-+
400-GN
123-WH
BK-00
BK-00
202-BK
202-BK
202-BK
201-BK
201-BK
201-BK
200-BK-14
200-BK
206-BK
602-WH
SUPPL
STEERING SW
8D2676
SUPPL STEERING
LAMP
7N5876
RUNNING
LAMP SW
7N8005
123-WH123-WH
727-GN
727-GN
200-BK
137-RD
610-OR-14
614-PU
614-PU
614-PU
103-YL
102-BU-14
PPP
237-BK
8X8386
LAMP 2
8X3708
LAMP 1
8X3708
205-BK
P A
3
2
6
5
4
1
TURN SW
8D6947
123-WH
449-BU
537-GN
415-GN
411-PK
611-PU-14
539-BU
540-WH
600-BR
201-BK
1 4
5
6
2
3
437-BR
407-PK
415-GN
411-PK
201-BK
410-WH
403-GN
417-GY
308-YL
226-BK
418-WH
408-WH
419-YL
426-BR
413-BR
406-PU
405-GY
412-BU
409-OR
454-GN
A
BLOWER SW
1V6652 STD
1V6653 ATCH
517-BU-14
515-GY-14
520-WH-14
WH/RD-14
BK-14
MOTOR
MOTOR
MOTOR
M
A
513-OR-14
200-BK-14
124-GN-14
2
3
1
PK-14
WW
VV
M
QQ
QQ
N
BK-14
BLOWER SW
1V6652
WH/RD-14
OR-14
BU-14
BK-14
BK
Z
A
N
BLOWER SW
1V6652 STD
1V6653 ATCH
PK-14
PK-14
DOME
LAMP
7X6398
DOME
LAMP SW
8D2676
2
1
200-BK-14
200-BK-14
PANEL
LAMP
2G1942
124-GN-14
520-WH-14
517-BU-14
515-GY-14WH/RD-14
BK-14
513-OR-14
519-PK-14
°T
308-YL
519-PK-14
513-OR-14
794-YL
202-BK
ALARM
9G9813
BR-18
OR-18
YL-18
BU-18
PU-18
BK-18
PK-18
WH-18
GN-18
GN-18
GY-18 OPR PANEL
KEY SW
STER SW
STER SW
GROUND
+ BATTERY
ALTERNATOR
MAG SW
2
1
9
8
7
6
5
4
3
2
1
LAMP
7N5876
LAMP
5D0019
LAMP
5D0019
LAMP
7N5876
727-GN
L4
L4
L5
L5
L33
L6
L2
L1
L1
L4
L6
OPERATOR STATION
141-PK
132-PK
123-WH
103-YL
102-BU-14
540-WH
614-PU
539-BU
308-YL
HEAD LAMP
DIMMER SW
2H1855
A
A
600-BR
PANEL DIMMER
RESISTOR
3T3437
403-GN
728-BU
403-GN
327-PK-14
327-PK-14
AIR PRESS
1W3306
410-WH
201-BK
600-BR
200-BK
410-WH
201-BK BK
RD
2
1
610-OR-14
600-BR
614-PU
2
1
610-OR-14
611-PU-14
611-PU-14
200-BK
200-BK
200-BK
417-GY
403-GN
L3
S
A
540-WH
539-BU
614-PU
3
2
4
1
5
L17
SUPPLEMENTAL
STEERING CONT
3E5184
A
A
200-BK
107-WH-14
308-YL
728-BU
200-BK
403-GN
727-GN
417-GY
539-BU
540-WH
614-PU
611-PU-14
610-OR-14
R
RA
A
2
3
4
1
4
3
5
2
1
8
7
6
OPERATOR MONITOR
TEST SW 9D3721
COOLANT
4W0483
BRAKE OIL
4W2067
RIGHT TURN
INDICATOR
LAMP
7N5876
MASTER
LAMP
7N1996
HIGH BEAM
INDICATOR LAMP
7N9967
LEFT TURN
INDICATOR
LAMP
7N5876
441-OR
205-BK
205-BK
205-BK
205-BK
205-BK
205-BK
205-BK
449-BU
123-WH
446-PU
441-OR
539-BU
415-GN
411-PK
611-PU-14
540-WH
600-BR
201-BK
SPEEDOMETER
3T3408
449-BU
539-BU
415-GN
201-BK
201-BK
201-BK
411-PK
611-PU-14
205-BK
600-BR
600-BR
600-BR
540-WH
600-BR
123-WH
446-PU
123-WH
123-WH
L30
OPERATOR STATION
L32
IGN
SEND
GRD
IGN
SEND
GRD
IGN
SEND
GRD
L33
308-YL
L33
L19
L17
PAYLOAD
GAUGE
START AID OUT ALARM
START AID OUT
START AID OUT
TEMP GAUGE
TEMP GAUGE
ACTION
ACTION
CONN 21
CONN 20
CONN 18
CONN 17
1 C-11
1 C-11
1 C-10
1 C-9
1 C-9
1 C-8
1 C-8
1 B-7
G-6
G-6 STD
F-6 ATCH
G-4
1 C-12
C-12
1
1
1
1
F-6
1
1 B-3
1 B-10
1 F-8
1
B-4
1
H-11
F-5
1
C-5
1
B-2
1
1
A-10
C-4
1 C-4
C-41
1
D-8
F-6
1
B-6
1
F-6
1
B-4
1
B-4
1
A-3
F-6
F-6
1
1
E-4
1
I-8
1
C-5
C-1
1
1
B-1
D-6
1
A-6
A-6
A-6
A-6
B-6
B-6
B-61
1
1
1
1
1
1
1
1 A-4
A-5
B-5
B-5
1
1
1
1 C-9
1 C-10
TO MACHINE STRUCTURE
THIS SCHEMATIC IS FOR THE 776B TRACTOR AND 777B TRUCK
(5T2581 CHG 13)
L36
L8
L35
L37
W/O PAYLOAD MONITOR
CONNECT WIRE AS. FFF
TO HARNESS AS. A
BK
FFF
408-WH
201-BK
321-BR
L19
L23
604-OR
L25
L35
L7
L3
L9
121-YL
L28
138-GN
L28
891-BU
TRANSMISSION GEAR
INDICATOR
8C9609
FRONT GR1
FRONT GR2
FRONT GR3
FRONT GR4
FRONT GR5
ID CODE 2
ID CODE 3
ID CODE 1
GROUND
FRONT GR5
FRONT GR4
FRONT GR3
FRONT GR2
FRONT GR1
+ BATTERY
733-BR
D
D
2
7
6
5
4
3
BK-18
PU-18
BU-18
GN-18
YL-18
OR-18
202-BK
737-GN
736-YL
735-OR
734-WH
733-BR
1 RD-18308-YL
202-BK
202-BK
BR-18
GY-18
WH-18
L36
4
2
3
1
820-BU
250-BK
819-GY
818-BR
799-WH
A
B
C
D
L37
L22
707-PU
CUSTOMER
DATA
CONNECTOR
PAYLOAD
MONITOR
CONTROL
9X6846
E
L18
DDD
799-WH
251-BK
867-PU
866-PK
865-GY
864-BR
863-BU
860-PK
861-PU
858-GY
859-YL
636-GN
635-BU
799-WH
707-PU
891-BU
794-YL
819-GY
820-BU
818-BR
250-BK
DDD
2
18
17
12
11
10
9
8
7
19
4
3
1
20
16
6
15
14
13
5
MODE
TEST/SET
GROUND
LCD LATCH
LCD CLOCK
TX LCD OUT
R REAR PR
L REAR PR
R FRONT PR
L FRONT PR
GREEN LAMP
RED LAMP
+24V (IN)
LINK GND
TX OUT
TX KEY OUT
RX IN
XMSN SPD
NEUTRAL
BED RAISE
891-BU
794-YL
891-BU
794-YL
DDD
891-BU
891-BU
2
4
3
2
A
138-GN
3
1
4
L37
138-GN
202-BK
794-YL
L26
1
707-PU 4
202-BK
3
794-YL
L25
L25
L25
L25
200-BK
A
A
308-YL
NEUTRAL START
CONTROL
7X1362
200-BK
200-BK
470-PU
307-OR
WH-18
BR-18
BU-18
GY-18
GN-18
BK-18
PU-18
OR-18
308-YL
STOP LAMP SW
2M9346
(776 ONLY)
604-OR
103-YL
STOP
LAMP SW
2M9346
103-YL
SERVICE/RETARDER
BRAKE
TEE
202-BK
706-BR
SECONDARY
BRAKE SW
3T3195
604-OR
L3
L7
L8
L8
720-PU
OPERATOR STATION
307-OR
437-BR
407-PK
454-GN
408-WH
419-YL
426-BR
413-BR
406-PU
412-BU
405-GY
418-WH
226-BK
409-OR
201-BK
200-BK
767-WH
SERVICE
BRAKE SW
3L6306
202-BK
706-BR
720-PU
RETARDER SW
4D4785
454-GN
SERVICE
BRAKE SW
3L6306
772-BR
767-WH
202-BK
200-BK
409-OR
470-PU
L9
306-GN
306-GN
777-PU-10
121-YL
138-GN-14
109-OR-6
122-BU
101-RD-6
103-YL
306-GN
409-OR
START SW
NEUTRAL
GROUND
2
3
1
YL-18
OR-18
BODY
RAISE SW GP
8C5681
BK-00
BK-00
+10V
ID CODE 3
ID CODE 2
ID CODE 0
ID CODE 1
BODY RAISE
GND VERIFY
GND VERIFY
XMSN SPEED
LKUP SOL
+ BATTERY
GROUND
UP SOL
DOWN SOL
RETARDER
LEVEL 1
LEVEL 2
LEVEL 3
LEVEL 4
LEVEL 5
BRAKE
GEAR 1
GEAR 2
GEAR 3
GEAR 4
GEAR 5
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
11
20
19
18
17
16
15
14
13
12
10
9
8
7
6
5
4
3
2
1
TRANSMISSION
CONTROL
9W0009
121-YL
14
13
12
11
SHIFT
LEVER SW
9W0681
BR-18
WH-18
OR-18
YL-18
GN-18
BU-18
BK-18
OR-18
734-WH
A
ZZ
ZZ
D
D
D
3
4
5
8
9
1
2
10
7
6
LEVER 1
LEVER 2
LEVER 3
LEVER 4
LEVER 5
GND VERIFY
GROUND
NEUTRAL
BACKUP
ALARM SW
9G7204
L8
707-PU
202-BK
470-PU
321-BR
121-YL
202-BK
308-YL
710-GN
470-PU
321-BR
121-YL
202-BK
308-YL
710-GN
1
6
3
5
2
1
4
735-OR
736-YL
737-GN
L17
L9
202-BK
L18
711-BR
712-WH
713-OR
714-YL
715-GN
716-BU
202-BK
470-PU
121-YL
321-BR
321-BR
1
2
3
4
5
6
9
7
10
8
711-BR
712-WH
713-OR
714-YL
715-GN
716-BU
706-BR
720-PU
707-PU
202-BK
308-YL
710-GN
218-BK
219-BK
703-BU
704-GY
705-PK
709-OR
721-BR
722-WH
723-OR
724-YL
725-GN
726-BU
227-BK
217-BK
707-PU
202-BK
D
707-PU
202-BK
1
2
9
4
2
5
6
7
8
3
GN-18
OPR PANEL
START RELAY
PK-18
+ BATTERY
XXX
L19
L9
L17
L18
L3
L20
L7
L21
L22
L23
L22
L21
L23
L20
L19
308-YL
307-OR
200-BK
200-BK
707-PU
CONN 4
CONN 8
CONN 10
CONN 9
CONN 24
CONN 11
D91196
WIRES THAT HAVE BATTERY VOLTAGE
WHEN THE KEY SWITCH IS OFF.
WIRES THAT HAVE BATTERY VOLTAGE
WHEN THE KEY SWITCH IS ON.
STARTING CIRCUIT.
GAUGE CIRCUIT.
MONITOR CIRCUIT.
PANEL LAMP CIRCUIT.
TRACTION AID CONTROL CIRCUIT.
HEATER AND AIR CONDITIONER CIRCUIT.
GROUND CIRCUIT.
TURN SIGNAL CIRCUIT.
ENGINE SHUTDOWN CONTROL CIRCUIT.
PAYLOAD MONITOR CIRCUIT.
START AID CIRCUIT.
TRANSMISSION CONTROL CIRCUIT.
ALL DASHED LINES ARE ATTACHMENTS.