INTERACTIVE SCHEMATIC

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 RENR9764-07
December 2014

938H and IT38H Wheel Loader

Electrical System
938H: IT38H:
MCC1-UP JNJ1-UP
MJC1-UP
JKM1-UP
LKM1-UP

Volume 1 of 2: Engine and Chassis Wiring

Volume 2 of 2: Cab Wiring

© 2015 Caterpillar, All Rights Reserved Printed in U.S.A.

 COMPONENT LOCATION
Volume 1 of 2 - ENGINE AND CHASSIS WIRING
Schematic Machine Schematic Machine
Component Component
Location Location Location Location
Alarm - Backup I-17 1 Sensor - Torque Converter Oil Temperature H-7 49
Alternator J-15 2 Sensor - Wastegate D-18 50
Battery J-12 3 Sensor - XMSN Pump Pressure H-7 51
Breaker - Buss (Cab) H-13 4 Solenoid - A/C Clutch H-16 52
Breaker - Glow Plugs G-13 5 Solenoid - Axle Oil Cooler Clutch G-16 53
Breaker - Main H-13 6 Solenoid - Clutch # 3 (Reverse) I-7 54
Control - Engine E-16 7 Solenoid - Clutch #1 (Forward Low) J-7 55
Control - Hood Raise/Lower Motor I-11 8 Solenoid - Clutch #2 (Forward High) J-7 56
Glowplugs 1- 6 G-16 9 Solenoid - Clutch #4 (Speed #2) I-7 57
Ground - Engine Block I-16 10 Solenoid - Clutch #5 (Speed #3) I-7 58
Ground - Frame J-11 11 Solenoid - Clutch #6 (Speed #1) I-7 59
Ground - LH Frame K-12 12 Solenoid - Differential Lock (Front) B-10 60
Ground - LH Frame Starter I-15 13 Solenoid - Differential Lock (Rear) B-10 61
Ground - Secondary Steering J-11 14 Solenoid - Differential Lock Actuation C-10 62
Horn - Forward (938H) L-2 15 Solenoid - Fan Brake Load Bypass I-9 63
Horn - Forward (IT38H) G-1 16 Solenoid - Fan Pump F-16 64
Motor - Autolube Pump L-1 17 Solenoid - Fan Valve F-16 65
Motor - Fuel Priming Pump G-15 18 Solenoid - Fuel Pump D-18 66
Motor - Hood Actuator I-17 19 Solenoid - Implement Pilot Shutoff (938H) I-2 67
Motor - Secondary Steering J-10 20 Solenoid - Implement Pilot Shutoff (IT38G) F-1 68
Motor - Starter J-15 21 Solenoid - Implement Power Management A-9 69
Motor - Washer Pump (Front) K-9 22 Solenoid - Injector 1- 6 D-17 70
Motor - Washer Pump (Rear) K-9 23 Solenoid - Quick Coupler I-1 71
Relay - Glowplug G-13 24 Solenoid - Ride Control #1 H-2 72
Relay - Main H-13 25 Solenoid - Ride Control #2 H-2 73
Resistor - CAN Datalink (Engine) E-14 26 Solenoid - Start Aid F-15 74
Sender - Fuel Level K-16 27 Solenoid - Variable Speed Fan B-10 75
Sender - Hydraulic Oil Temperature E-7 28 Solenoid - XMSN Pump Flow Bypass I-9 76
Sender - Rear Axle Oil Temperature J-15 29 Suppressor - HVAC Arc H-16 77
Sender - XMSN Oil Temperature J-7 30 Suppressor - Quick Coupler Arc H-1 78
Sensor - Ambient Air Temperature F-15 31 Suppressor - Secondary Steering Arc J-10 79
Sensor - Articulation Angle H-9 32 Switch - A/C Pressure H-16 80
Sensor - Cam Speed E-18 33 Switch - Bucket Position (IT38H) F-1 81
Sensor - Converter Output Speed J-7 34 Switch - Bucket/Tilt Position (938H) K-2 82
Sensor - Coolant Temperature E-18 35 Switch - Case Drain Filter B-10 83
Sensor - Crank Speed E-18 36 Switch - Disconnect J-12 84
Sensor - Front Wheel Speed (LH) I-1 37 Switch - Fork Position (IT38H) G-1 85
Sensor - Front Wheel Speed (RH) I-1 38 Switch - Front Axle Oil Monitoring J-2 86
Sensor - Fuel Rail P ressure D-18 39 Switch - Fuel Priming Pump G-15 87
Sensor - Intake Manifold Pressure E-18 40 Switch - Ground Level Shutdown I-11 88
Sensor - Intake Manifold Temperature E-18 41 Switch - Hood Actuator I-11 89
Sensor - Lift Cylinder Head End Pressure K-2 42 Switch - Hydraulic Filter Bypass C-10 90
Sensor - Lift Position K-2 43 Switch - Lift Position (938H) L-2 91
Sensor - Oil Pressure D-18 44 Switch - Lift Position (IT38H) H-1 92
Sensor - Output Speed (Leading) I-7 45 Switch - Low Brake Oil Pressure C-10 93
Sensor - Output Speed (Trailing) I-7 46 Switch - Steering Pressure (Primary) K-9 94
Sensor - Rear Wheel Speed (LH) L-17 47 Switch - Steering Pressure (Secondary) K-9 95
Sensor - Rear Wheel Speed (RH) L-17 48 Switch - XMSN Filter Bypass C-10 96
 COMPONENT LOCATION
Volume 2 of 2 - CAB WIRING
Schematic Machine Schematic Machine
Component Component
Location Location Location Location
12V Accessory Outlet D-11 97 Switch - Beacon J-6 128
12V Cigar Lighter G-6 98 Switch - Bucket Fork Select (IT38H) E-9 129
12V Convertor D-11 99 Switch - Dimmer C-3 130
Alarm -Action J-7 100 Switch - Downshift I-10 131
Block - Fuse D-7 101 Switch - Forward Horn D-3 132
Cluster - Instrument G-3 102 Switch - Forward Horn (Implement Console) H-10 133
Control - A/C Temperature B-9 103 Switch - Hazard Lamps J-6 134
Control - Payload L-14 104 Switch - Heater Mirror F-9 135
Control - Product Link J-10 105 Switch - HID Lamp J-6 136
Control - XMSN G-14 106 Switch - HVAC Blower Fan Speed C-9 137
Diodes - Turn Signal E-2 107 Switch - HVAC Select C-9 138
Display - Autolube C-11 108 Switch - Hydraulic Metering Unit I-6 139
Flasher Module E-2 109 Switch - Implement Lock Out F-9 140
Ground - Cab #1 H-13 110 Switch - Keystart D-3 141
Ground - Cab #2 H-13 111 Switch - Lift Tilt Kickout On/Off E-9 142
Horn - Quick Coupler B-9 112 Switch - Manual Differential Lock C-11 143
Joystick - FNR H-10 113 Switch - Parking Brake Limit D-11 144
Messenger G-3 114 Switch - Payload Zero C-9 145
Motor - Air Seat Compressor E-11 115 Switch - PCS Clear I-10 146
Motor - Blower I-18 116 Switch - Quick Coupler D-9 147
Motor - Operator Seat Heater Compre ssor E-11 117 Switch - Remote FNR H-10 148
Motor - Wiper (Front) H-6 118 Switch - Ride Control F-9 149
Motor - Wiper (Rear) L-16 119 Switch - Running Lamp K-6 150
Radio - Product Link L-10 120 Switch - Stop Lamp I-6 151
Resistor - CAN Datalink (Cab) J-8 121 Switch - Thermostat J-18 152
Resistor - Blower J-18 122 Switch - Turn Signal E-2 153
Resistor - CAN Datalink (Payload) H-14 123 Switch - Wiper Washer (Front) H-6 154
Sensor - Brake Pedal (LH) I-6 124 Switch - Wiper Washer (Rear) G-6 155
Sensor - Throttle Position D-3 125 Switch - Worklamp K-6 156
Shifter - XMSN H-3 126 Valve - Implement Pilot J-8 157
Suppressor - Arc E-2 127 Valve - Water J-18 158
CONNECTOR LOCATION
Volume 1 of 2 - ENGINE AND CHASSIS WIRING

Schematic
Connector Number
Location
CONN 1 D-17
CONN 2 D-17
CONN 3 D-17
CONN 4 F-15
CONN 5 G-15
CONN 6 K-16
CONN 7 L-16
CONN 8 E-13
CONN 9 E-13
CONN 10 C-9
CONN 11 J-8
CONN 12 E-6
CONN 13 G-6
CONN 14 I-6
CONN 15 G-4, K-4
CONN 16 H-2
CONN 17 H-2
CONN 18 H-2
CONN 19 I-2
CONN 20 J-2
CONN 21 J-2
CONN 22 K-2
CONN 23 D-4, K-2
CONN 24 L-2
CONN 25 D-2
CONN 26 L-2
CONN 27 L-2
The connectors shown in this chart are for harness to harness
connectors. Connectors that join a harness to a component are
generally located at or near the component. See the
Component Location Chart.
 CONNECTOR LOCATION
Volume 2 of 2 - CAB WIRING

Schematic
Connector Number
Location
CONN 12 E-17
CONN 13 F-17
CONN 14 H-17
CONN 15 I-3
CONN 28 J-16
CONN 29 J-15
CONN 30 PCS Printer Connector H-14
CONN 31 Autolube Service Connector C-11
CONN 32 E-11
CONN 33 J-12
CONN 34 Service Tool Connector H-8
CONN 35 K-7
CONN 36 K-7
CONN 37 L-7
CONN 38 E-3
The connectors shown in this chart are for harness to harness
connectors. Connectors that join a harness to a component are
generally located at or near the component.
See the Component Location Chart.
CID / MID / FMI

Component Identifiers (CID¹)

Module Identifier (MID²)
Engine Control System
(MID No. 036)
CID Component
0001 Cylinder #1 Injector
0002 Cylinder #2 Injector
0003 Cylinder #3 Injector
0004 Cylinder #4 Injector Event Codes
0005 Cylinder #5 Injector Engine Control
0006 Cylinder #6 Injector Event Code Condition
0041 8 Volt DC Supply 0194 High Exhaust Temperature
0091 Throttle Position Sensor 0265 User Defined Shutdown
0100 Engine Oil Pressure Sensor 0360 Low Engine Oil Pressure
0110 Engine Coolant Temperature Sensor 0361 High Engine Coolant Temperature
0168 Battery Voltage 0362 Engine Overspeed
0171 Ambient Air Temperature Sensor 0396 High Fuel Rail Pressure
0172 Intake Air Temp Sensor 0398 Low Fuel Rail Pressure
0190 Engine Speed Sensor 0441 Idle Elevated to Increase Batt Voltage
0253 Personality Module 0539 High Intake Manifold Air Temperature
0261 Engine Timing Calibration 1044 High Intake Manifold Pressure
0262 5V DC Sensor Supply 1045 Low Intake Manffold Pressure
0267 Remote Shutdown Input Event Codes
0268 Programed Parameter Fault
Machine Control
0291 Engine Cooling Fan Solenoid
0049 Coasting in Neutral Warning
0296 Transmission Control
0284 Low Brake Accumulator Pressure
0342 Sec Engine Speed Sensor
0329 Transmission Filter Plugged
0526 Turbo Wastegate Actuator
0454 Hydraulic Case Drain Filter Plugged
1438 Engine Cooling Fan Solenoid #2
0490 Park Brake On - Not In Neutral
1639 Mach Sec System ECM
0627 Parking Brake On - Machine In Motion
1779 Fuel Rail Pressure Valve Solenoid
0861 Clock Manual Alignment Required
1785 Intake Manifold Pressure Sensor
0878 High Hydraulic Oil Temp
1797 Fuel Rail Pressure Sensor
0879 Hydraulic Tank Oil Filter Plugged
1834 Ignition Key Swtich
2129 High Front Axle Temp
1849 Engine Fan Reverse Relay
2130 High Rear Axle Temp
2246 Glow Plug Start Aid Relay
Event Codes
¹ The CID is a diagnostic code that indicates which circuit is faulty.
² The MID is a diagnostic code that indicates which electronic control module Payload Control
diagnosed the fault. 0643 Zero Timer Expired
0782 Lift Pressure Change During Weigh
Failure Mode Identifiers (FMI)¹
0783 Machine Pitched or Bucket Tilted
FMI No. Failure Description
0784 Weight too heavy to zero
0 Data valid but above normal operational range.
1027 Lift Too Slow To Weigh
1 Data valid but below normal operational range.
1028 Lift Stopped During Weigh
2 Data erratic, intermittent, or incorrect.
1042 Excessive Lift Speed Change
3 Voltage above normal or shorted high.
1043 Lift Too Jerky During Weigh
4 Voltage below normal or shorted low.
2083 Payload Memory Low
5 Current below normal or open circuit.
2138 Payload Memory Full
6 Current above normal or grounded circuit.
7 Mechanical system not responding properly. Event Codes
8 Abnormal frequency, pulse width, or period. Product Link Control
9 Abnormal update. 0861 Manual Clock Alignment Required
10 Abnormal rate of change.
11 Failure mode not identifiable.
12 Bad device or component.
13 Out of calibration.
14 Parameter failures.
15 Parameter failures.
16 Parameter not available.
17 Module not responding.
18 Sensor supply fault.
19 Condition not met.
20 Parameter failures.
¹The FMI is a diagnostic code that indicates what type of failure has occurred.
 SPECIFICATIONS AND RELATED MANUALS
Volume 1 of 2 - ENGINE AND CHASSIS WIRING

Volume 1 - Off Machine Switch Specification

Part No. Function Actuate Deactuate Contact Position
Low 275 kpa¹1 Low 170 ± 55 kPa
( 4 0 psi) ( 25 ± 8 psi) 1-3 Normally Open
114-5333 A/C (High/Low) Pressure
2800 ± 140 kPa 1750 ± 200 kPa 2-3 Normally Closed
High ( 406 ± 20.3 psi) High
( 254 ± 29 psi)
313-5104 Primary & Secondary Steering Pressure 1,200 kPa MAX 700 ± 100 kPa A-B Normally Open
(174.04 psi MAX) (101.5 ± 14.5 psi) A-C Normally Closed
10,700 kPa MAX 8,960 ± 537 kPa A-B Normally Open
314-2405 Low Brake Oil Pressure
(1552 psi MAX) (1300 ± 78 psi) A-C Normally Closed
¹ With increasing pressure the closed condition can be maintained up to 2800 kpa (405 psi), with decreasing pressure the closed condition can be maintained
down to 170 kpa (25psi).
² Contact position at the contacts of the harness connector.

Related Electrical Service Manuals

Title Form Number
235-7132 (65A) Std
Alternator: SENR4130
235-7133 (80A) Atch

Engine Control System: KENR5392

Machine Control System: RENR8999
Machine Monitoring System: RENR6319
Payload Control System: SENR6614

Volume 1 - Resistor, Sender and Solenoid Specifications

Part No. Component Description Resistance (Ohms)¹
134-2540 Resistor: Engine CAN Data Link 120 ± 10%
148-3551 Solenoid: Demand Fan Shutoff 32.6 ± 1.6
174-4916 Solenoid: Differential Lock Actuation 8.7 ± 0.4 @ 25°C (77°F)
183-5106 Solenoid: A/C Clutch 17.6 ± 0.6
239-1134 Solenoid: Start Aid 20
Rear Differential Lock
241-5895 Solenoid: Front Differential Lock 33.75 ± 5%
Implement Pilot Shutoff
Transmission Clutch #1 (Forward High)
Transmission Clutch #1 (Forward Low)
Transmission Clutch #1 (Reverse)
244-3114 Solenoid: 8.7 ± 0.4
Transmission Clutch #1 (Speed #1)
Transmission Clutch #1 (Speed #2)
Transmission Clutch #1 (Speed #3)
Ride Control #1 41.9 ± 2.1
244-8686 Solenoid:
Ride Control #1
Empty: 240 - 250
266-0298 Sender: Fuel Level
Full: 28 - 33
Variable Fan Speed
285-5730 Solenoid: 5 ± 0.3 @ 25°C (77°F)
Implement Power Management
297-1860 Solenoid: Axle Oil Cooler 9.4 ± 5 @ 20°C (68°F)
¹ At room temperature unless otherwise noted.
 SPECIFICATIONS AND RELATED MANUALS
Volume 2 of 2 - CAB WIRING

Off Machine Switch Specification

Part No. Function Actuate Deactuate Contact Position
-1.1 ± 0.8 °C 2.2 ± 0.8 °C
3E-5464 Thermostat Normally Closed
(30.02 ± 1.44 °F) (36 ± 1.44 °F)
 HARNESS and WIRE
Electrical Schematic Symbols
Symbols

Pressure Temperature Level Flow Circuit Breaker

Symbol Symbol Symbol Symbol Symbol

Symbols and Definitions

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

Switch (Normally Open): A switch that will close at a specified point (temp, press, etc.). The circle indicates that the component has
screw terminals and a wire can be disconnected from it.

Switch (Normally Closed): A switch that will open at a specified point (temp, press, etc.). No circle indicates that the wire cannot be
disconnected from the component.

Ground (Wired): This indicates that the component is connected to a grounded wire. The grounded wire is fastened to the machine.

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

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
T
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.

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.

Magnetic Latch Solenoid: A magnetic latch solenoid is an electrical component that is activated by electricity and held latched 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.

Harness and Wire Symbols

Wire, Cable, or Harness Assembly Identification: Harness Identification Letter(s): (A, B, C, ..., AA, AB, AC, ...)
Includes Harness Identification Letters and Harness
Connector Serialization Codes (see sample).
Harness Connector Serialization Code: The "C" stands for
"Connector" and the number indicates which connector in the
harness (C1, C2, C3, ...).
AG-C4 L-C12
111-7898 3E-5179 L-C12
3E-5179
Part Number: for 1 Part Number: for
Connector Plug
Connector Receptacle
2

Plug Receptacle
Pin or Socket Number

5A
1 Deutsch connector: Typical representation
Component
of a Deutsch connector. The plug contains all Fuse (5 Amps) 9X-1123 Part Number
2 sockets and the receptacle contains all pins.
325-AG135 PK-14
1 Sure-Seal connector: Typical representation Harness identification code:
of a Sure-Seal connector. The plug and receptacle This example indicates wire group 325, Wire Gauge
2 contain both pins and sockets. wire 135 in harness "AG". Wire Color
 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

L L

K K

J J

I I

H H

G G

F F

E E

D D

WIRE GROUP COLOR DESCRIPTIONS

CIRCUIT CONNECTED

CIRCUIT NOT CONNECTED

C ELECTRICAL CONNECTION TO C
MACHINE STRUCTURE
INTERNAL ELECTRICAL CONNECTION
TO SURFACE OF COMPONENT

CONNECTOR

H# CIRCUIT GROUPING DESIGNATION

ATCH WIRE, CABLE, COMPONENT

SPLICE

OTHER COLOR DESCRIPTIONS BLADE, SPADE, RING OR SCREW

TERMINAL

ABBREV COLOR

B B

THIS SCHEMATIC IS FOR THE 938H AND IT38H WHEEL LOADER ELECTRICAL SYSTEM
A VOLUME 1 of 2: ENGINE AND CHASSIS WIRING A
MEDIA NUMBER: RENR9764-07
SCHEMATIC PART NUMBER: 264-5848, CHANGE: 02, VERSION: -

18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

L L

K K

J J

I I

H H

G G
KEYSWITCH ON
XMSN OUTPUT SP SENSOR (A) +
XMSN OUTPUT SP SENSOR (A) -
XMSN OUTPUT SP SENSOR (B) +
XMSN OUTPUT SP SENSOR (B) -
XMSN INTER. SPEED SNSR (A) +
XMSN INTER. SPEED SNSR (A) -
XMSN INTER. SPEED SNSR (B) +
XMSN INTER. SPEED SNSR (B) -
CAT DATA LINK HIGH
BACKUP ALARM
BTRY- (1)
CONVERTER OUTPUT SP SNSR +
CONVERTER OUTPUT SP SNSR -

CAT DATA LINK LOW

XMSN OIL TEMP
BTRY- (2)
RH BRAKE PEDAL

FUEL LEVEL SENDER

HYD TEMP SENDER
BTRY+ (1)
F F
HMU 2-4 AUTO 4
AUTO/MANUAL SW - MANUAL
HMU 1-4 AUTO 1-4

BTRY+ (2)
HMU 1 OR UPSHIFT SW(N/C)
HMU 2 OR UPSHIFT SW(N/O)
HMU 3 OR DOWNSHIFT SW(N/C)
HMU 4 OR DOWNSHIFT SW(N/O)
8V SENSOR SUPPLY
8V SENSOR RET
BTRY+ (3)
CLUTCH 6 (SPEED1)
CLUTCH 5 (SPEED3)
RET FOR SP CLUTCHES #1-3
CLUTCH 4 (SPEED2)
IMPL PWR MGMT SOL
REAR AXLE OIL TEMP SENDER
SOLENOID RETURN
BTRY- (3)
DIFF LOCK ACT. SOL
FRONT DIFF LOCK SOL
RETURN FOR FORWARD
RR DIFF LOCK SOL
CLUTCH 2 (FORWARD HIGH)
IMPL POD DOWN SHIFT N/O
XMSN OIL FILTER BYPASS SW
CLUTCH 3 (REVERSE)
E CLUTCH 1 (FWD LOW) E
LIFT/TILT DETENT SOL
DEMAND FAN SOL
DRIVETRAIN SWG RETURN
KEYSWITCH START
AXLE COOLER RELAY
AUX/FLOAT DETENT SOL
RIDE CONT/AXLE COOLER RET
RIDE CONT SOL ON/OFF #1
RIDE CONT SOL ON/OFF #2
START RELAY
START RELAY/BACKUP ALM RET
SEC STEER INTERMEDIATE RELAY
HEATED MIRROR RELAY
COLD START RELAY

ALTERNATOR R TERMINAL
LEFT FRONT WHEEL SPEED A
LEFT FRONT WHEEL SPEED B
LEFT PEDAL POSITION SENSOR

DIRECTION SW (NEUTRAL)
RIGHT FRONT WHEEL SPEED B
RIGHT FRONT WHEEL SPEED A
RIGHT REAR WHEEL SPEED B
RIGHT REAR WHEEL SPEED A
DIRECTION SW (REVERSE)
D HEATED MIRROR SWITCH D
XMSN PUMP PRESSURE SNSR
LEFT REAR WHEEL SPEED A
LEFT REAR WHEEL SPEED B
PRIM. STRG PRESSURE SW (N/O)
PRIM. STRG PRESSURE SW (N/C)
IMPL DETENT ENABLE SW
SEC STEERING PRESS SW (N/O)

HYD FILTER BYPASS SW

RIDE CONTROL SW (AUTO)
RIDE CONTROL SW (ON)
LOW BRAKE OIL PRESSURE SW
ARTICULATION ANGLE SNSR
DIRECTION SW (FORWARD)
FRONT AXLE OIL TEMP SW
TORQUE CONVERTER TEMP SNSR
PARK BRAKE SW-ENGAGED
PARK BRAKE SW-DISENGAGED
DIFF LOCK SW (N/O)

REMOTE FNR INPUT 6

REMOTE FNR INPUT 4
REMOTE FNR INPUT 1
SEC STEERING PRESS SW (N/C)
CASE DRAIN OIL FILTER SW
C C
CAN DATA LINK HIGH
CAN DATA LINK LOW

WIRE GROUP COLOR DESCRIPTIONS

CIRCUIT CONNECTED

CIRCUIT NOT CONNECTED

ELECTRICAL CONNECTION TO
MACHINE STRUCTURE
INTERNAL ELECTRICAL CONNECTION
TO SURFACE OF COMPONENT

CONNECTOR

H# CIRCUIT GROUPING DESIGNATION

ATCH WIRE, CABLE, COMPONENT

B B
SPLICE

BLADE, SPADE, RING OR SCREW

TERMINAL OTHER COLOR DESCRIPTIONS

ABBREV COLOR

THIS SCHEMATIC IS FOR THE 938H AND IT38H WHEEL LOADER ELECTRICAL SYSTEM
A VOLUME 2 of 2: CAB WIRING A
MEDIA NUMBER: RENR9764-07
3A SCHEMATIC PART NUMBER: 264-5848, CHANGE: 02, VERSION: -

18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
(AC) HARNESS - IT38H FRONT FRAME
HARNESS

81
92
85

CONN 23

16

78

71

86

68
CONN 15
30

37

38
(AG) HARNESS - 938H FRONT FRAME HARNESS

91
CONN 17
82 CONN 23
CONN 20

72 15

73 CONN 24
CONN 26

43

CONN 22

42
CONN 16
CONN 27 CONN 15
17
67

CONN 18
CONN 21
CONN 19
(AT) HARNESS - TRANSMISSION HARNESS

34
49

56
55
54
57
CONN 14
59

58
45
51
46

TRANSMISSION AR
(PC) HARNESS - PAYLOAD HARNESS & (PL)
HARNESS - PRODUCT LINK HARNESS

105

120

CONN 30

CONN 29
CONN 33

123
104