©
1998 Caterpillar
All Rights Reserved
Printed in U.S.A.
RENR1156
March 1998
M318 and M320 Wheeled Excavator
Electrical System
8SS1-UP
9PS1-UP
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
1
2
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.
325-L25 PK-14
200-L32 BK-14
325-A135 PK-14
AG-C4
111-7898
L-C12
3E-5179
AG-C4
111-7898
L-C12
3E-5179
C-C4
130-6795
*
*
*
*
*
*
*
Harness And Wire Electrical Schematic Symbols
Electrical Schematic Symbols And Definitions
9X-1123
Part Numbers For
Connector Assembly
Component
Part Number
Wire, Cable, or Harness
Assembly Identification
Circuit Number
Identification
Wire
Color
Single Wire
Connector
Wire
Gauge
2
Socket
Pin
Pin or Socket
Number
Plug
Receptacle
1
1
1
2
2
Typical representation of a
Sure-Seal connector. The plug
and receptacle contain
both pins and sockets.
Typical representation of
a Deutsch connector. The
plug contains all sockets
and the receptacle contains
all pins.
AG-C3
130-6795
Harness identification letter(s) and a
serializing code. The "C" stands for
connector and the number indicates
which connector in the harness.
Harness identification code
This example indicates wire
32 in harness "L'.
System Faults Detected by the Controller
Error Message Logged Result of Fault Possible Causes
Main Pump Circt No • Main pump set to minimum
output.
• Main pump PRV solenoid faulty.
• Open in harness wiring for main PRV solenoid.
• Harness wiring for main PRV solenoid shorted to ground.
Low Voltage No • None. • Battery voltage below 17 DCV.
RPM Setting Diff No • Engine operates at high idle
(no effect on AEC or Heavy
Lift operation).
• Engine speed requested does not match the actual governor actuator
position.
RPM Setting High No • Low idle speed too low.
• Engine stall speed too high or low.
• Governor actuator position signal too high.
• Open or shorted supply voltage circuit.
• Low idle stop passed.
RPM Setting Low No • High idle speed too high.
• Engine stall speed too high or low.
• Governor actuator position signal too low.
• Open or shorted supply voltage circuit.
• High idle stop passed or engine speed adjustment is loose.
Swing Pump No • Swing pump set to minimum
output.
• Swing pump PRV solenoid faulty.
• Open in harness wiring for swing PRV solenoid.
• Harness wiring for swing PRV solenoid shorted to ground.
Low Engine Speed No • Hydraulic pump outputs are
reduced.
• Signal from engine speed sensor indicates engine speed is below 750 ± 25rpm.
• Engine speed sensor is not adjusted properly or is faulty.
• Open in harness wiring from engine speed sensor to controller.
• Harness wiring for engine speed sensor is shorted to ground.
• Incorrect number of flywheel teeth specified in parameter settings.
High Engine Speed Yes • Engine overload.
• Engine stalls.
• Signal from engine speed sensor indicates engine speed is above 2150 ±200
rpm
• Incorrect number of flywheel teeth specified in parameter settings.
RPM Dial Setting Yes • Engine speed set to high idle
(No effect on AEC or Heavy Lift
operation).
• Engine speed dial is faulty.
• Engine speed dial signal circuit has an open.
• Engine speed dial supply voltage circuit has an open or is shorted to ground.
• Engine speed dial signal circuit is shorted to ground.
Heavy Lift Circt Yes • Heavy lift does not operate
correctly.
• Heavy lift solenoid is faulty.
• Open in harness wiring for heavy lift solenoid.
• Harness wiring for heavy lift solenoid is shorted to ground.
Mode Sw Open Yes
• Power mode 1 selected no
matter what the position of
the power mode switch.
• Mode switch is faulty.
• Open in harness wiring for mode switch.
• Mode switch supply voltage circuit has an open or is shorted to ground.
Mode Sw Short Yes
• Power mode 1 selected no
matter what the position of
the power mode switch.
• Mode switch is faulty.
• Short to ground in harness wiring for mode switch.
Component Location
Component
Schematic
Location
Machine
Location
Component
Schematic
Location
Machine
Location
Alarm - Travel F-9 1 Solenoid - Stabilizer Lockout (Left Front) F-1 18
Alternator C-8 2 Solenoid - Stabilizer Lockout (Left Rear) F-6 27
Battery - F-8 3 Solenoid - Stabilizer Lockout (Right Front) F-1 18
BB3 C-7 A Solenoid - Stabilizer Lockout (Right Rear) F-6 27
Beacon E-1 A Solenoid - Start Aid B-9 30
Control - Engine C-8 A Solenoid - Swing Brake E-9 16
Control - Engine/Pump C-7 A Solenoid - Swing Pump Prv E-8 16
Control - Suppl Steer F-8 4 Solenoid - Transmission Speed E-8 11
Converter - 24V-12V C-2 A Solenoid - Travel Activation E-9 16
Diode - Brake D-4 D Solenoid - Travel Lock F-2 16
Diode - Temp D-4 D Starter C-8 5
Diode AEC Aux Hyd D-5 D Stick Travel Lamp As C-1 19
Diode Stop Lamp D-5 D Switch - A/C B-7 C
Engine Speed Dial B-1 C Switch - A/C Pressure D-8 8
Flasher E-4 C Switch - AEC B-6 C
Fuse - Alternator C-9 5 Switch - AEC Boom-Cylinder E-9 19
Fuse - Block A Black E-6 D Switch - AEC Implement Travel Switch D-9 19
Fuse - Block B Yellow E-6 D Switch - AEC Stick-Cylinder E-9 19
Fuse - Block C Green D-6 D Switch - AEC Swing D-9 16
Fuse - Block D Red D-6 D Switch - Air Filter Clog C-9 20
Fuse - Main E-5 D Switch - Air Horn E-2 A
Governor Actr C-8 6 Switch - Aux Hyd (CCW Rotation) D-2 B
Horn - Compressed Air D-1 7 Switch - Aux Hyd (CW Rotation) 0-2 C
Horn - Forward C-1 7 Switch - Backup B-7 C
Hour Meter D-3 D Switch - Beacon B-3 C
Monitor Panel B-2 C Switch - Brake Light F-3 21
Motor - A/C Fan D-8 8 Switch - Brake Light Cutoff D-2 B
Motor - Fuel Pump F-8 9 Switch - Cab Riser B-5 C
Motor - Heater Fan B-5 10 Switch - Cab Riser (Down) C-3 C
Motor - Suppl Steer F-7 4 Switch - Cab Riser (Up) C-3 C
Motor - Washer (Lower) E-8 11 Switch - Coolant Temp C-8 2
Motor - Washer (Upper) E-8 3 Switch - Creeper Speed C-4 C
Motor - Wiper (Lower) D-1 12 Switch - Disconnect F-8 3
Motor - Wiper (Upper) D-2 A Switch - Dome Light E-2 A
Regulator - A/C Temp B-6 10 Switch - Engine Oil Pressure C-8 8
Relay - A/C Clutch D-8 D Switch - Forward/Reverse Travel Alarm (2) F-4 21
Relay - A/C Fan D-8 D Switch - Front Flood Lamp C-3 C
Relay - AEC Aux Hyd E-5 D Switch - Hammer B-5 C
Relay - Air Horn D-4 D Switch - Hazard B-3 C
Relay - Alarm Cab Riser E-3 C Switch - Head Lamp C-3 C
Relay - Brake E-4 D Switch - Heater Fan B-6 C
Relay - Brake/Travel Cutoff D-3 D Switch - Heavy Lift B-6 C
Relay - Main Power E-4 D Switch - Horn/Turn/High Beam F-2 A
Relay - Pilot Pressure Enable E-4 D Switch - Hydraulic Oil Filter Clog D-9 24
Relay - Power Mode E-4 D Switch - Hydraulic Oil High Temp Sender D-9 23
Relay - Start C-9 5 Switch - Hydraulic Oil Low Temp D-9 23
Relay - Start/Stop D-4 D Switch - Key Start C-4 C
Relay - Stop Lamp D-4 D Switch - Low Brake Pressure F-3 21
Relay - Suppl Steer E-8 D Switch - Low Transmission Clutch Pressure E-8 11
Relay - Suppl Steer F-8 4 Switch - Overload Warning Device B-3 25
Relay - Temp D-4 D Switch - Overload Warning Device B-5 C
Relay - Trans Speed E-4 D Switch - Parking Brake B-3 C
Relay - Travel Alarm E-3 D Switch - Pilot Control Lock B-3 B
Relay - Travel Cutoff D-3 D Switch - Power Mode C-4 C
Resistor (Backup) - Main Pump Prv D-6 D Switch - Primary Steering Flow F-3 21
Resistor (Backup) - Swing Pump Prv D-6 D Switch - Rear Flood Lamp C 3 C
Resistor - Heater Fan D-6 10 Switch - Refueling Pump E-3 D
Reverse Steer Light F-2 A Switch - Reverse Steer Prox B-3 26
Sender - Coolant Temp C-8 2 Switch - Stabilizer Lockout (Left Front) B-5 C
Sender - Fuel Level E-9 13 Switch - Stabilizer Lockout (Left Rear) B-5 C
Sensor - Engine Speed C-9 14 Switch - Stabilizer Lockout (Right Front) B-6 C
Solenoid - A/C Clutch D-8 15 Switch - Stabilizer Lockout (Right Rear) B-6 C
Solenoid - Aux Hyd (CCW) F-9 16 Switch - Start Aid B-6 C
Solenoid - Aux Hyd (CW) F-9 16 Switch - Starting/Pilot Press Enable D-3 B
Solenoid - Blade Front E-1 27 Switch - Step Door Safety B-4 A
Solenoid - Blade Rear F-6 17 Switch - Swing Brake B-3 A
Solenoid - Cab Riser (Down) E-9 D Switch - Trans Speed C-4 C
Solenoid - Cab Riser (Up) E-9 D Switch - Travel Alarm Cancel B-3 C
Solenoid - Creeper Speed E-9 16 Switch - Travel Lock B-4 C
Solenoid - Engine Start/Stop D-8 6 Switch - Travel Pedal F-2 A
Solenoid - Hammer D-8 16 Switch - Windshield (Lower) D-2 A
Solenoid - Heavy Lift D-9 16 Switch - Windshield (Upper) D-2 A
Solenoid - Implement Activation E-9 16 Switch - Wiper (Lower) B-4 C
Solenoid - Main Pump Prv E-8 16 Switch - Wiper (Upper) B-4 C
Solenoid - Parking Brake E-8 11 Swivel F-5 22
Machine locations are repeated for components located close together.
A = Operator Compartment
B = Operator Compartment - Left Console
C = Operator Compartment - Right Console
D = Operator Compartment - Behind Operator Compartment
Off Machine Switch Specifications
Part No. Function Actuate Deactuate
Contact Position
3E-6429 Supplemental Steering Oil Flow
4 grams
(.14 oz)
1.5 grams
(.05 oz)
Normally Open
3E-6455 Engine Oil Pressure
90 ± 21 kPa
(13 ± 3.0 psi)
70 ± 21 kPa
(10 ± 3.0 psi)
A-B, Normally Open
A-C, Normally Closed
5W-9934 Air Filter Clog 187.5 mm Hg (7.4 in Hg) NA Normally Open
5W-9972 Low Brake Oil Press 10000 kPa (1450 psi) NA Normally Open
8U-2158 Brake Light Press 500 kPa (72.5 psi) NA Normally Open
8U-9306 Low Trans Clutch Press 2500 kPa (362 psi) NA Normally Open
9D-7032 Travel Press
517 ± 34.5 kPa
(75.0 ± 5.0 psi)
414 ± 34.5 kPa
(60.1 ± 5.0 psi)
Normally Open
116-4710 High Hydraulic Oil Temp 94°C (201°F) NA Normally Open
116-8514 Hydraulic Oil Filter Press 250 kPa (36.3 psi) NA Normally Open
117-0651 AEC Implement/Travel Press 1500 kPa (218 psi) NA
1-2 Normally Closed
1-3 Normally Open
118-5501 Overload Warning Press 16000 kPa (2320 psi) NA Normally Open
119-3399 Engine Coolant Temp 100°C (212°F) NA Normally Open
119-3400 Low Hydraulic Oil Temp
Closes On Decreasing
Temperature 11°C (52°F)
Opens On Increasing
Temperature 17°C (63°F)
Normally Closed
127-0925 AEC Swing/Stick/Boom Press 500 kPa (72.5 psi) NA
1-4 Normally Closed
1-2 Normally Open
Resistor, Sender and Solenoid Specifications
Component Description
Part No. Resistance (Ohms)¹
3E-1906 17.6 ± 0.6
8C-3663
1.55 ± 0.15
10.3 ± 1.03
8U-6424 19
122-2373 47
124-0329 Overall - 6.0; Tap 1.5 or 4.5
8U-1516
60°C (1 40°F) - 134
90°C(194°F)- 51.2
100°C (21 2°F) - 38.5
112-7178
Empty -70.6; Full -
0.4
116-4710
60°C (140°F) - 134
90°C (1 94°F) - 51.2
100°C (212°F) - 38.5
123-0156 27²
¹ At room temperature.
² At operating temperature.
Solenoid - Pump PRV
Solenoid - A/C Clutch
Solenoid - Engine Start/Stop
Solenoid - Heavy Lift, Hammer, Park
Brake, Trans Speed, Swing Brake,
Creeper Speed, Travel Actuator,
Implement Actuator, Aux Hyd CCW,
Aux Hyd CW, Blade Front, Right
Front Stabilizer, Left Front Stabilizer
Resistor - Heater Fan
Resistor - Backup
Sender - Engine Coolant Temp
Sender - Fuel Level
Sender - Hydraulic Oil Temp
Connector Location¹
Connector Number
Schematic
Location
Machine
Location
CONN 1 C-7 28
CONN 2 C-7 29
CONN 3 D-7 29
CONN 4 E-7 29
CONN 5 D-6 29
CONN 6 C-6 29
CONN 7 C-6 28
¹ The connectors shown in this chart are for harness to harness connectors with a
minimum of four contacts and other special connectors. Connectors that join a
harness to a component are generally located at or near the component. See the
Component Location Chart.
Related Service Manuals
Form Number
Alternator: 9W-3043
SENR3685
Electronic Control Systems
SENR6265
Starting Motor: 8C-4774
Consist: 8C-4773
SENR3559
Consist: 3E-1944
SENR3581
Consist: 106-8558
SENR3559
Title
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
7
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
7
Machine Harness Connector And Component Locations
E32958
L# CIRCUIT GROUPING
DESIGNATION
ATCH WIRE, CABLE,
COMPONENT
CIRCUIT NOT CONNECTED
CIRCUIT CONNECTED
BLADE, SPADE, RING,
OR SCREW TERMINAL
INTERNAL ELECTRICAL
CONNECTION TO SURFACE
OF COMPONENT
ELECTRICAL CONNECTION
CONNECTOR
SYMBOL DESCRIPTION
NOTE A:
COMPONENTS ARE SHOWN INSTALLED ON A FULLY
TO MACHINE STRUCTURE
OPERABLE MACHINE WITH THE KEY AND ENGINE OFF.
UNLESS OTHERWISE SPECIFIED: ALL WIRE IS 16 GAUGE
SWITCH SHOWN WITH NO HYDRAULIC DEMAND
NOTE:
OF THE SWITCH DEPRESSED, AS SEEN FRON THE OPERATORS SEAT.
ALL CONSOLE SWITCHS ARE SHOWN WITH THE FRONT
COMPONENTS ARE SHOWN INSTALLED ON A FULLY
OPERABLE MACHINE WITH THE KEY AND ENGINE OFF.
UNLESS OTHERWISE SPECIFIED:
AWG MM*2
0 50
4 16
6 10
8 6
10 4
12 2.5
14 1.5
16 1
00 70
ABBREV COLOR
BK BLACK
BR BROWN
BU BLUE
GN GREEN
GY GRAY
OR ORANGE
PK PINK
PU PURPLE
RD RED
WH WHITE
YL YELLOW
1 PARKING LIGHTS RHS 7,5
2 PARKING LIGHTS LHS 7,5
3 INSTRUMENT LIGHTING 7,5
4 LOW BEAM RHS 7,5
5 LOW BEAM LHS 7,5
6 HIGH BEAM RHS 7,5
7 HIGH BEAM LHS 7,5
8 CONTROL LIGHTS; TURN SIGNAL 7,5
FUSE "A" BLACK
1 ELECTRICAL FUEL LIFT PUMP 25
2 WARNING LIGHT; START/STOP SOLENOID 7,5
3 STARTER KEY SWITCH; MAIN POWER-RELAY; LIGHT 15
4 POTENTIAL TRANSFORMER 24V ==> 12V (RADIO) 7,5
5 START/STOP RELAY 7,5
6 COMPRESSOR AIR HORN 15
7 15
8 CIGARETTE LIGHTER; PLUG; DOME LIGHT 7,5
FUSE "B" YELLOW
1 BACKUP 7,5
2 POWER MODE SELECTION 7,5
3 INDIVIDUAL STABILIZERS 7,5
4 WORKING LIGHTS 15
5 HAMMER BLOW FREQUENCY ADJUST.; FLOW CONTROL 7,5
6 ELECTRONICS 7,5
7 ROTATING BEACON 15
8 AIR SUSPENDED DRIVER SEAT; PRIORITY 7,5
FUSE "C" GREEN
1 STOP LIGHT 7,5
2 AIR CONDITION 20
3 HORN; BUZZER (OVERLOAD); 1/3 PRESSURE DROP 7,5
4 BLUE LIGHT (REVERSE STEERING); TRAVEL ALARM 7,5
5 ARM REST SWITCH; SWING GEAR; MISCELLANEOUS- 15
6 SUPPLEMENTAL STEERING 7,5
7 WINDSHIELD WIPER UPPER AND PUMP 7,5
8 WINDSHIELD WIPER LOWER AND PUMP 7,5
FUSE "D" RED
FUNCTION; RELAY TRAVEL CUT OFF; PARK BRAKE;
TRANSMISSION SPEED; CREEPER SPEED; CAB-RISER
BK/YL(1)
RADIO
119-2006
SPEAKER
5W-8937
SPEAKER
5W-8937
DOME LIGHT
5W-2041
CIGAR LIGHTER
5W-9628
UPPER WIPER
122-2367
FLOOD LAMP
120-6776
FLOOD-LAMP
120-6776
REAR WORK
LAMP AS.
120-6776
UPPER WINDSHIELD
122-2369
TO CAB
PU(7)
YL(2)
GY/BK(1)
GY(7)
BK/PU(1)
GN(8)
BK/GN(10)
BK(12)
BU/WH(1)
BK/WH(5)
BK-14
ANTENNA
5W-9391
BEACON
116-9627
BK
BK /YL(1)
RD
RD
BK
YL(14)
YL(14)
BK
BK/WH(5)
BK/WH(6)
BK
BK
BK
BU/WH(1)
RD
RD
PU(7)
BK
BK
GY/BK(2)
BK(12)
GY(7)
GY/BK(1)
BK/GN(10)
BK-14
YL(2)
GN(2)
BK/GN/RD(1)
BK/GN/RD(8)
RD/YL(8)
GN(10)
BK/GN/RD(9)
PU(7)
OR(1)
BK
PU(7)
CONVERTER
24V-12V
120-6566
START AID SW
8U-6357
AEC SW
5W-9372
A/C SW
5W-9347
HAMMER
SWITCH
8U-7284
OVERLOAD WARNING
DEVICE SWITCH
5W-9347
LOWER
WIPER SW
5W-9744
UPPER
WIPER SW
5W-9744
TRAVEL LOCK
SWITCH
8U-6357
PARKING
BRAKE SW
8U-6353
SWING BRAKE
SWITCH
8U-6353
CREEPER SPEED
SWITCH
5W-9347
PILOT CONTROL
LOCK SW
5W-9372
BEACON SW
5W-9347
TRAVEL ALARM
CANCEL SW
8U-6357
REAR FLOOD
LAMP SW
5W-9347
FRONT
FLOOD
LAMP SW
5W-5867
HEAD
LAMP SW
5w-5867
BK(12)
GY(7)
BK/GN(10)
GN(8)
BK/PU(1)
BU/WH(1)
BK/WH(5)
BK/YL(1)
YL(2)
GY/BK(1)
TO FRAME
BK
GY(2)
BK(1)
RD/YL(6)
BK(6)
RD/YL(1)
BK/GN/RD(3)
RD(5)
BK/GN/RD(3)
BK/YL(1)
BK(6)
BU/WH(1)
BK(1)
BK/WH(5)
BK/YL/WH(2)
BK
RD/YL(1)
RD/YL(6)
GY
RD/YL(30)
RD/YL(17)
GY
GY
GY
GY
GY
BU/WH(1)
BK/YL(1)
BK
BK
BK
BK
BK
BK
BK
BK/GN/RD(7)
GN/BU(5)
BK/GN(6)
BK/GN(12)
BK/GN(2)
GY
BU/YL(1)
BU/YL(2)
PU(2)
BK/WH(1)
BK/GN/RD(6)
BU(3)
GN/BR(2)
GN/BU(5)
BK/GN(6)
BK/GN/RD(2)
BK/GN/RD(2)
YL(10)
RD/YL(30)
BU/YL(2)
BK
BK
BK
BK
BK/GN(11)
BK/WH(1)
OR(2)
RD/YL(31)
BK
PU(1)
BK/RD(1)
BK
GY
GY
WH(6)
WH(5)
BK/WH(3)
GN(8)
BK
BK(12)
WH(5)
WH(6)
BK/GN(7)
BK/GN(10)
GY(7)
BK(12)
GN(8)
BU(10)
GN(9)
BK
RD(2)
GN(10)
RD(3)
RD(2)
YL(1)
YL(9)
BK
GY
GY
BK
RD/YL(7) WH(1)
BK(2)RD/YL(5)
BK
RD/YL(27)
BK(3)
GY
RD/YL(29)
RD/YL(28)
BK
GY
GY
BK
BK(4)
BK(5)
BK(5)
BK(3)
RD/YL(5)
BK(2)
RD/YL(7)
YL(1)
WH(1)
GY
GN(1)
RD/YL(3)
BK
RD/YL(26)TO FRAME
GY
BK BK
PU(8)
PU(8)
RD(21)
RD(21)BK
GY(1)
GYBK
BK
YL(7)
YL(13)
YL(8)
YL(7)YL(13)
BU(11)
RD(20)
BK(10)
BK
BK
BK
YL(11)
YL(12)
BU(10)
GN(9)
BK
RD(21)
PU(8)
BR
SHIELD
BR
GN
WH
SHIELD
RD(24)
WH(6)
BK/GN(7)
BK/WH(3)
GN/BU(5)
BK/GN(6)
BK/YL/WH(2)
GY(1)
BR/BK(2)
BR/WH(3)
RD/YL(3)
GN(1)
RD/YL(5)
BK(2)
RD/YL(7)
BK(3)
BK(4)
BK(5)
YL (1)
WH(1)
RD(2)
RD(3)
BU/YL(1)
BU/YL(2)
PU(2)
BK/WH(1)
BK/GN/RD(2)
BK/GN(2)
GY(2)
BK(1)
RD/YL(1)
BK(6)
RD/YL(6)
BK/GN/RD(3)
BR/WH(2)
GN/WH(1)
RD(5)
RD(1)
GN/BR(1)
BK(7)
WH(2)
BK/GN(1)
BK(8)
OR(3)
WH(3)
BU(1)
BR/BK(1)
RD(4)
BR/WH(1)
GN(3)
BU (2)
RD/YL(2)
RD/YL(9)
BU(4)
BK/PU(1)
GY/BK(1)
YL(2)
OR(1)
BK/RD(1)
GN(2)
RD/YL(8)
BK/GN/RD(1)
GY(1)
STOP LAMP
117-4861
START/STOP
117-4861
BRAKE
117-4861
TRANS
SPEED
117-4861
TEMP.
117-4861
REFUELING
PUMP SWITCH
8U-3011
YL(4)
BK/YL/WH(1)
BK/WH(2)
GN/WH(2)
GN/BU(2)
BK/PU(2)
GN/WH(3)
GN/BU(3)
GY(3)
RD/YL(10)
BK/GN(4)
PU(2)
BK/GN(5)
RD(6)
BR(1)
BK(8)
WH(3)
GN/BU(1)
GN/BU(1)
BU(1)
BR/WH(3)
BK/GN/RD
(3)
GN/BR(7)
BK/GN(15)
BK/WH(1)
GN/BR(4)
GN/BR(3)
BU/YL(3)
GN(4)
GN/BR(3)
GN/BR(4)
GN(4)
BU/YL(3)
WH(4)
RD/YL(11)
GN/BU(4)
GN/WH(4)
GY(4)
RD(8)
RD/YL(12)
RD(7)
BU/YL(4)
RD(9)
BU(7)
GN(5)
BU(5)
WH(1)
BK(4)
BK(5)
BK(2)
BK(3)
YL(1)
BK(1)
BR/WH(2)
BR/BK(1)
BR/WH(1)
BR/BK(2)
GN(2)
GN(1)
RD(10)
BU(8)
WH(7)
YL (5)
BU(9)
RD(11)
GN(6)
BU(10)
BK/GN(6)
GN/BU(5)
BK/GN(7)
BK/WH(3)
BK/YL/WH(2)
WH(5)
WH(6)
WH(1)
BK(1)
BK(2)
BK(3)
BK(4)
YL(1)
BK(5)
BR/WH(1)
BR/BK(1)
BR/WH(2)
BR/BK(2)
GN(1)
GN(2)
BU(1)
BR/WH(3)
BK/GN/RD(3)
BK/WH(1)
BK(8)
WH(3)
OR(1)
RD/YL(9)
RD/YL(8)
RD(4)
GY/BK(1)
BK/PU(1)
BU/YL(2)
RD/YL(5)
RD/YL(6)
RD/YL(7)
RD/YL(1)
RD(5)
BK(7)
RD(3)
RD/YL(3)
YL(2)
GY(1)
GN/WH(1)
RD/YL(2)
GY(2)
RD(2)
GN/BR(1)
BK/GN(1)
BK/GN/RD(2)
BK/GN/RD(1)
BK/RD(1)
BK/GN(2)
RD(1)
BU(4)
GN(3)
BU/YL(1)
BK(6)
WH(2)
BU(2)
RD-14(1)
GN/WH(2)
GN/BU(2)
GY(2)
RD-10(6)
RD-10(4)
RD-10(3)
RD-10(1)
RD-10(8)
RD-10(7)
RD/YL(2)
GN/WH(3)
GN/WH(1)
GN/WH(4)
GN/BU(3)
GN/BU(4)
GY(1)
GY(3)
GY(5)
GY(4)
GY(6)
YL(2)
RD/YL(16)
RD/YL(3)
RD(16)
RD(18)
OR(1)
RD(3)
BK(7)
RD(19)
BU-10(2)
RD(5)
RD/YL(1)
RD(10)
RD/YL(14)
RD/YL(7)
RD/YL(6)
RD/YL(5)
BU/YL(2)
BK/PU(1)
BK/PU(2)
GY/BK(1)
RD(4)
RD(8)
RD/YL(8)
RD/YL(15)
RD/YL(12)
RD/YL(13)
RD/YL(9)
RD/YL(11)
RD-12
RD/YL(10)
YL(2)
RD/YL(3)
RD/YL(16)
RD(16)
OR(1)
RD(3)
BK (7)
BU-10(2)
RD(18)
RD(19)
RD/YL(2)
GN/WH(1)
GN/WH(3)
GN/WH(4)
GN/BU(3)
GN/BU(4)
GY(1)
GY(2)
GY(3)
GY(4)
GY(5)
GY(6)
RD(5)
RD/YL(14)
RD(10)
RD/YL(1)
RD/YL(5)
RD/YL(6)
BU/YL(2)
RD/YL(7)
BK/PU(1)
BK/PU(2)
GY/BK(1)
RD(4)
RD(8)
RD/YL(8)
RD/YL(9)
RD/YL(10)
RD/YL(11)
RD/YL(12)
RD/YL(13)
RD-12
RD/YL(15)
RD-12
GY(5)
GY(6)
RD/YL(13)
BU-10(2)
RD(10)
RD/YL(16)
RD/YL(14)
RD/YL(15)
RD(16)
RD(18)
RD(19)
GY(2)
RD/YL(3)
RD(4)
GY/BK(1)
BK/PU(1)
RD/YL(1)
BU/YL(2)
RD/YL(5)
RD/YL(6)
RD/YL(7)
RD/YL(8)
RD(5)
BK(7)
RD(3)
RD/YL(9)
YL(2)
GY(1)
GN/WH(1)
RD/YL(2)
OR(1)
RD/YL(11)
RD(8)
GY(4)
GN/WH(4)
GN/BU(4)
RD/YL(12)
BK/PU(2)
GN/WH(3)
GN/BU(3)
GY(3)
RD/YL(10)
TO BOX
BK/GN/RD(4)
WH(14)
YL(4)
OR(10)
WH(2)
RD/YL(13)
GN(6)
BK/WH(2)
BK(6)
BU-10(2)BU-10(1)
RD/YL(16)
BK
TO BOX
RD/YL(16)
RD(10)
BU-10(2)BK/WH(2)
BK/YL/WH(1)
YL(4)
BK
BK
BK
BK
BU(2)
BU(5)
BK
GN(6)
RD(15)
BK
BK
BK
RD(14)
BU(10)
BU(8)
WH(7)
BU/YL(1)
BK
BK
BKBU(9)
YL(5)
PU(4)
RD/YL(14)
BK RD(11)
GN(3)
GN(5)
BU(7)
BU(4)
PU(4)
RD(9)
RD(1)
RD(13)
WH(8)
RD(14)
RD(2)
GN/BR(1)
BK/GN(1)
BK/GN/RD(2)
BK/GN/RD(1)
BK/RD(1)
BK/GN(2)
BK
BK
BK
BK
BK
BK/GN(1)
BK/GN(4)
GN/BR(1)
BK/GN/RD(2)
BK/GN/RD(1)
BK/GN/RD(4)
WH(9)
WH(9)
RD/YL(15)
BK/RD(1)
BK
BK
RD(13)
RD(17)
RD(16)
RD(7)
BK
RD(19)
BU/YL(4)
RD(18)
RD(16)
RD/YL(15)
RD/YL(14)
RD(1)
BU(4)
GN(3)
BU/YL(1)
BK(6)
WH(2)
BU(2)
RD(7)
BU/YL(4)
RD(9)
BU(7)
GN(5)
BU(9)
YL(5)
WH(7)
BU(8)
BU(10)
GN(6)
RD(10)
BK/GN(4)
BK/GN(5)
RD(6)
BR(1)
RD(6)
BR(1)
RD-8(1)RD-8(2)
RD-8(1)RD-8(3)
RD-6(4)
WH(3)
BK(8)
BK(9)
BK
BK
RD(12)
RD(26)
BK
BK
GY(5)
BK(9)
BK
RD(12)
GY (5)
GY (6)
WH(4)
RD(12)
GY(6)
GY(5)
WH(4)
BK(9)
BK
BK
RD(26)
GY(6)
WH(4)
GY(9)
GY(9)
BK
BK
BK
BK
GY(9)
GY(10)
GY(6)
WH(4)
RD(26)
GY(6)
WH(4)
RD(26)
LAMP
LICENCE PLATE
116-9623
WH(4)
BK
GY(6)
BK
BK
RD(26)
WH(4)
GY(6)
BK
RD(26)
BU(11)
RD(20)
BK(10)
BK
YL(13)
BK
WH
RD
BK
BR
BK(1) WH
BKBK
WH-14
BK-14
GY(8)
BK
BK
BK
BK
BK
GY(4)
GY(8)
WH(4)
RD/YL(11)
GN/BR(3)
GN/BR(4)
GN/BU(4)
GN/WH(4)
RD(7)
RD/YL(11)
GN/BR(3)
GN/BR(4)
GN/BU(4)
GN/WH(4)
GY(4)
WH(4)
RD/YL(12)
BU/YL(3)
BK
BK
YL(1)
OVERLOAD WARNING
DEVICE SWITCH
118-5501
WH
GN
BR
RD(23)
BK
BU(10)
YL(5)
BU(9)
RD(11)
GN(6)
BU(8)
RD(10)
WH(7)
YL(11)
GN
WH
RD(21)
GN(9)
YL(12)
BR
SHIELD
BR(2)
WH(10)
YL(11)
SHIELD
RD(11)
BR
BU(8)
YL(12)
GN(9)
GN(6)
BU(9)
YL(5)
WH
GN
RD(21)
RD(10)
RD(22)
WH
GN
BR
BK(14)
BU(13)
BK
BK
PU(9)
RD(23)
WH(10)
BR(2)
BK(13)
BK(13)
RD(22)
RD(22)
TURN SIGNAL
LAMP AS.
116-9626
FLOOD
LAMP AS.
120-6775
GN/BU(1)
BK/GN(6)
GN/BU(5)
BK
GN/BR(4)
BR(1)
BU/YL(3)
BKBU(13)
AIR
HORN SW
5W-9376
SWING
BRAKE SW
8U-6109
TRAVEL
PEDAL SW
136-9421
REVERSE
STER LIGHT
5W-9323
TO
PLATFORM
GN/BR(3)
GN/BU(2)
BK/YL/WH(2)
WH(3)
BK/GN(4)
GN/WH(2)
BU/YL(3)
GN/BU(5)
BK/GN(6)
GN/BU(1)
BR(1)
GN/BR(4)
BU(13)
BK
BK
BK
BK(8)
GY(3)
GN/WH(3)
GN/BU(3)
TURN SIGNAL
LAMP AS.
116-9626
TO FRAME
BR
BU
BR
BU
BR
DK-BU
GN/YL
BK
LEFT FRONT
STABILIZER
LOCKOUT SOL
8U-6424
RIGHT FRONT
STABILIZER
LOCKOUT SOL
8U-6424
BK/GN(7)
BK/WH(3)
BK/PU(2)
LOWER WIPER
6C-9156
RD(6)RD/YL(10)BK/WH(7)
BK/WH(2)
BK
BK BK
BU(1)
RD/YL(10)
RD(6)
BU(1)
FORWARD/REVERSE
TRAVEL ALARM
SW (QNTY 2)
9D-7032
BRAKE
LIGHT SW
8U-2158
LOW BRAKE
PRESS SW
5W-9972
RD(25)
RD(25)
BK
BK
TO FRAME
BR
BU
BR
BU
BR
DK-BU
GN/YL
BK
RIGHT REAR
STABILIZER
LOCKOUT SOL.
8U-6424
LEFT REAR
STABILIZER
LOCKOUT SOL.
8U-6424
BK(2)
BK(3)
BK(4)
BK(5)
BK
BK(1)
BK(2)
BK(3)
BK(4)
GN/YL
GN/YL
BR
GN/YL
DK-BU
BK
GN/YL
BR
RD(12)
RD(12)
BK/GN(8)
BU-10(1)
TO FRAME
TO FRAME
BKSTICK TRAVEL
LAMP AS.
8U-4742
RD/YL(12)
BU/YL(3)
YL(1)
BK (1)
RD/YL(11)
GN/BR(3)
GN/BR(4)
GN/BU(4)
GN/WH(4)
GY(4)
WH(4)
RD/YL(12)
BU/YL(3)
YL(1)
BU(13)
GN/BR(3)
GN/BU(5)
BK/YL/WH(2)
WH(3)
BK/GN(6)
GN/WH(2)
BU/YL(3)
GN/BU(1)
BK/GN(4)
GN/BU(2)
BR(1)
GN/BR(4)
BK(8)
GN/BU(3)
GN/WH(3)
GY(3)
BK/GN(7)
BK/WH(3)
BK/PU(2)
BK/WH(2)
RD/YL(10)
RD(6)
BU(1)
RD(25)
BU-10(1)
BK/GN(8)
BK(2)
BK(3)
BK(4)
BK(5)
GY(5)
GY(6)
RD(12)
RD-6(4)
BK(9)
WH(4)
BU-10(1)
BK/GN(8)
BK/GN(8)
BU-10(1)
BK
REFUELING
PUMP
5W-8633
RD-00 BK-00
BK-00
RD-6(4)
DISCONNECT
SWITCH
7N-0718
12V BATTERY
(QNTY 2)
3T-5760
RD(12)
GY(6)
GY(5)
WH(4)
BK(9)
BK/GN(8)
BU-10(1)
RD-6(4)
BK
BK(18)
BK(18)
BK(14)
WH(7)
BK(14)
WH(7)
GN/BR(4)
GN/BU(1)
WH(3)
BK/GN(4)
GN/WH(2)
BU/YL(3)
GN/BU(2)
BR(1)
BK(8)
GN/BU(3)
GN/WH(3)
GY(3)
BK/PU(2)
BK/WH(2)
RD/YL(10)
RD(6)
BU(1)
GN/BR(3)
BK(5)
BK(4)
BK(3)
BK(2)
WH(7)
BK/GN(6)
GN/BU(5)
BK/GN(7)
BK/WH(3)
BK/YL/WH(2)
BU(13)
BK(14)
RD(25)
GN(4)
GN/BR(4)
GN/BU(1)
WH(3)
BK/GN(4)
GN/WH(2)
BU/YL(3)
GN/BU(2)
BR(1)
BK(8)
GN/BU(3)
GN/WH(3)
GY(3)
BK/PU(2)
BK/WH(2)
RD/YL(10)
RD(6)
BU(1)
GN/BR(3)
BK(2)
BK(3)
BK(4)
BK(5)
RD(8)
WH(1)
BU (7)
RD(9)
BR/BK(1)
GN(4)
BU/YL(4)
BR/WH(1)
BU(5)
GN(5)
BR/BK(2)
GN(1)
BR/WH(2)
GN(2)
WH(6)
WH(5)
BK/YL/WH(2)
BK/WH(3)
BK/GN(7)
GN/BU(5)
BK/GN(6)
DK-BU
BK
BK(4)
BK(3)
BK(2)
BK(1)
PU(8)
BK
TO FRAME
RD(25)
YL
RD-4
YL
SUPPL STER
MOTOR
118-9168
PU(3)RD(8)
PU(3)
RD(8)
WH(15)
WH(15)
BK
BK
BK-4
TO FRAME
WASHER
UPPER
8U-2598
WASHER
LOWER
8U-2598
RD-00
RD-00
RD(24)
BK(15)
WH
BR
SHIELD
WH(12)
BK(16)
YL (17)
BK(17)
BK
BK
WH(5)
BK(15)
PU(9)
SHIELD
BR
WH
YL(17)
BK(17)
WH(12)
BK(16)
OR(4)
BK(17)
PU(6)
BK(16)
SWING PUMP PRV
SOLENOID
123-0156
MAIN PUMP PRV
SOLENOID
123-0156
PU(9)
PU(9)
SHIELD
BR
WH
WH
BR
SHIELD
TO FRAME
BK
BK
BK
BK
BK/GN/RD(3)
BK/YL/WH(1)
BU(16)
RD(35)
BK/GN/RD(3)
BK/YL/WH(1)
IMPLEMENT
ACTIVATION
SOLENOID
151-2515
TRAVEL
ACTIVATION
SOLENOID
151-2515
SWING
BRAKE
SOLENOID
151-2515
CREEPER
SPEED
SOLENOID
151-2515
TO FRAME
PU(2)
GN/BU(1)
BR/WH(3)
BK/GN (5)
BK/WH(1)
YL(4)
YL(4)
BR/WH(3)
GN/BU(1)
PU(2)
PARKING
BRAKE
SOLENOID
8U-6424
TRANSMISSION
SPEED
SOLENOID
8U-6424
BK BK
BK
BK
BK
LOW TRANSMISSION
CLUTCH PRESS SW
8U-9306
PU(2)
GN/BU(1)
BR/WH(3)
BK/GN (5)
BK/WH(1)
YL(4)
GN/BR(7)
BK/GN(15)
BK/GN/RD(3)
BK/YL/WH(1)
HEAVY LIFT
SOLENOID
8U-6424
RD(24)
BK(15)
HAMMER
SOLENOID
8U-6424
BK
WH(1)
BK
BK
BK
BK
BK
HYD OIL
FILTER
CLOG SW
116-8514
PU(13)
PU(8)
BU(7)
RD(9)
BR/BK(1)
BR/BK(1)
GN(1)
BR/WH(2)
GN(2)BR/WH(2)
AIR FILTER
CLOG SW
5W-9934
RD(7)
FORWARD
HORN
153-6559
BK(1)
RD(7)
BK
BK
COMPRESSED
AIR HORN
5W-9400
TO FRAME
TO ENGINE
BK-00
BK-4
BK-00
BR/BK(5)
BK
BR/BK(2)
BU(5)
GN(5)
BR/WH(1)
BK
GN(4)
BU/YL(4)
BR/WH(1)
BU (5)
GN(5)
BR/BK(2)
GN(2)
BK
RD-4(4)
RD-4(4)
RD-6(2)
RD-4(1)
RD-6(3)
RD-4(1)
COOLANT TEMP
SWITCH
119-3399
COOLANT TEMP
SENDER
8U-1516
ALTERNATOR
9W-3043
RD-6(2)
BR/BK(5)
BK
BK
START
BK-8
GN-8
BK
BK
BK-8
GN-8
RD-4
BK-10
TO BOX
BK-6 BK-6
TO FRAME
BK-6
BK-6
0
TO CAB
TO FRAME
YL(15)
YL(16)
YL(13)
GN(4)
BK
OR(8)
YL(16) YL(13)
YL(15)
YL(16)
YL(15)
YL(13)
RD-12
BK
BK-12
BR-12
L1
L2
L2
L1
L3
L3
L1
L4
L1
L4
L5
L5
L4
L1
L6
L7
L7
L8
L8
L9
L9
L10
L10
L11
L12
L12
L11
L10
L4
L1
BK
BK
BK
L15
L14
L14
L15
L26
21
L17
L16
L13
L13
L24
L46
L45
L13
L16
L17
L43
L44
L40
L46
L6
L18
L19
L20
L21
L22
L19
L18
L37
L38
L39
L41
L40
L42
L42
L36
L33
L33
L24
L23
L6
L22
L19
L23
L6
L28
L29
L30
L31
L32
L26
L27
L18
L82
L20
L21
L31
L31
L30
L29
L28
L27
L34
L36
L37
L65
L66
L66
L67
L67
L56
L65
L57
L55
L45
L86
L41
L40
L47
L53
L54
L56
L57
L58
L59
L60
L61
L48
L49
L62
L63
L64
L64
L63
L62
L61
L54
L60L59
L52
L50
L49
L48
L46
L44
L50
L38
L39
L51
L50
L87
L43
L38
L39
L43
L47
L32
L51
L32
L34
L30
L51
L36
L48
L29
L30
L36
L51
L46
L50
L49
L44
L52
L52
L46
L34
L28
L27
L34
L34
L28
L28
L59
L58
L53
L68
L55
L67
L55
L67
L60
L54
L70
L61
L70
L64
L63
L62
L70
L68
L63
L68
L68
L68
L71
L72
L73
L74
L73
L72
L64
L75
L75
AIR SUSPENDED
DRIVER SEAT
GY
BK
TO UNDCRG
GY
TO FRAME
GY
GN
WH
BR
BU
BLADE REAR
SOLENOID
8U-6424
BR
BU
BLADE FRONT
SOLENOID
8U-6424
PU(3)
PU(3)
PU(3)
WH(6)
WH(5)
BK/YL/WH(2)
BK/WH(3)
BK/GN(7)
GN/BU(5)
BK/GN(6)
BK/GN(6)
GN/BU(5)
WH(6)
WH(5)
BK/YL/WH(2)
BK/GN(7)
BK/WH(3)
L76
L76
OR(2)
HEATER FAN
122-2372
RESISTOR
122-2373
BK/YL/WH(1)
GN(13)
BK
L77
L77
L77
L78
BRAKE/
TRAVEL
CUTOFF
117-4861
BK
BK
GN(13)
GN(13)
L78
L48
BK
BU(13)
BK
WH
BK
WH
BK/RD(2)
L
L
L A
A
A
W
C
C
C
C
G
G
C
C
D
D
D
D
G
V
V
V
G
G
L
L
D
D
D
C
C
L
L
D
D
D
D
U
U
D
D
D
N
D
DD
D
G
G
G
G
G
G
G
D
A
F
E
C
A
C
C
W
D
W
W
X
X
P
FF
R
R
T
W
FF
N
SWIVEL
121-2974
D
BB
AA
Y
Y
Z
C
C
C
C
W
G
C
K
C
C
BB
Z
AA
H
C
C
C
D
D M
D
D
D
D
D
D
B
V
V
<<
H
H
H
H
H
H
H
H
H
B
B
B
H
B
B
A
A
A
A
A
A
A
F
A
F
A
F
A
F
A
A
A
A
A
A
A
A
A
A
L46
L44
L50
L48
A
A
A
A
F
A
A
B
B
E
B
E
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
E
B
B
B
B
B
B
B
B
B
B
CC
DD
YL(9)
YL(9)
GN(10)
SUPPL STER
AUX HYD
(CW ROTATION)
SOLENOID
8U-6424
AUX HYD
(CCW ROTATION)
SOLENOID
8U-6424
PU(8)
A1
A2
A3
A4
A5
A6
A7
A7
A6
A5
A4
A3
A2
A1
POWER
MODE
117-4861
PILOT PRESS
ENABLE
117-4861
HEAVY
LIFT SW
5W-9347
LEFT REAR
STABILIZER
LOCKOUT SW
5W-9347
RIGHT REAR
STABILIZER
LOCKOUT SW
5W-9347
LEFT FRONT
STABILIZER
LOCKOUT SW
5W-9347
RIGHT FRONT
STABILIZER
LOCKOUT SW
5W-9347
Y
Z
OR(3)
OR(3)
OR(3)
OR(3)
BR/RD
BR
BR
BR/RD
BK-14
BU/YL(5)
BK/WH(4)
BK
BK
GN/WH(1)
BK/GN(9)
GN/BR(5)
YL(11)
YL(12)
WH(2)
BU(4)
RD/YL(18)
BU/YL(5)
BK/GN(11)
GN(3)
YL(10)
BK/WH(4)
BK
BR/WH(1)
BU(2)
RD(1)
RD(4)
PU(3)
BR/BK(1)
BR/WH(2)
RD/YL(9)
BU(1)
YL(9)
OR(3)
BR/BK(2)
BR/WH(3)
SHIELD
BR
GN
WH
YL(11)
YL(12)
BK
BK
YL(11)
YL(12)
BK
GN/BR(5)
RD/YL(18)
BK/GN(9)
BK
YL(10)
BU/YL(5)
BK/WH(4)
BK/GN(11)
GN/WH(1)
WH(2)
BU(4)
GN(3)
BR/WH(1)
BU(2)
RD(1)
GN/BR(1)
BK(7)
WH(3)
BK/GN(1)
BK(8)
RD(1)
BU(2)
BR/WH(1)
GN(3)
RD/YL(2)
BU(4)
WH(2)
GN/WH(1)
OR(3)
BU(1)
RD/YL(9)
BR/WH(2)
BR/BK(1)
PU(3)
RD(4)
YL(9)
BK
TO FRAME
GY
BR/BK(2)
BR/WH(3)
YL(11)
YL(12)
PU(3)
BK/RD(2)
L80
L80
L80
L80
L80
L79
L79
L79
L80
L81
L81
L81
L81
L55
L69
L69
L69
L35
L35
RD(27)
DIODE
8U-8045
RD(27)
RD(27)
BACKUP SW
8U-6353
PU(6)
OR(4)
GN(7)
WH(12)
BU(15)
GN(7)
WH(12)
BU(15)
YL(17)
BK
BU(15)
GN(7)
GN(7)
BU(15)
PU(6)
WH(12)
OR(4)
YL(17)
BU(15)
GN(7)
OR(4)
PU(6)
YL(17)
WH(12)
BK(17)
BK(16)
L82
L83
L83
L84
L84
L83
L85
L85
RD(28)
RD(28)
RD(29)
BU(15)
GN(7)
BACKUP RESISTOR
MAIN PUMP PRV
124-0329
BACKUP RESISTOR
SWING PUMP PRV
124-0329
RD-8(3)
RD-10(2)
KL.30
BK(9)
WH(4)
L33
RD-10(5)
RD-8(2)
RD-10(4)
RD-10(3)
RD-10(8)
RD-10(7)
KL.15
RD-00
RD-00
OR(6)
OR(5)
OR(5)
GY
GY
BK
F
F F
F
E
B
E
EG
PU(12)
PU(12)
TO CAB
L86
PU(12)
GN/BR(7)
BK/GN(15)
L87
BK
BK
HCR&AEC
BRAKE
AEC
AUX-HYD
117-4861
L86
PU(12)
BK
GY
GY
BK-10
BK
BK-10
BK-10
L4
L1
EE
BK-10 SHIELD
L7
SHIELD
K
K
G
G
A
FF
FF
L47
BK-10
K
BK
RD(27)
RD(30)
PU(11)
PU(2)
PU(2)
TO FRAME
BK
RD(31)
GN(4)GN(4)
DV
V
FAN
CLUTCH
L89
L89
L89
L88
RD(31)
RD(31)
RD(31)
L88
L88
RD(31)
RD-12
RD-12
RD(31)
L89
L88
BK
BK
WH(15)
BK
BK
RD(8)
RD(32)
WH(15)
GN(14)
BK
BK
GN(15)
BK
BK
WH(15)
WH(15)
W
SUPPL STER
RELAY
117-4861
W
W
AEC BOOM-CYL
AEC STICK-CYL
AEC SWING
PU(12)
BK
PU(5)
DIODE
8U-8045
RD(36)
PU(14)
BK
PU(15)
DIODE
8U-8045
RD(37)
PU(16)
BK
PU(17)
DIODE
8U-8045
BK
BK BK
TRANS SPEED
SWITCH
5W-9372
HARNESS AS
DIODE
142-9472
BK-12
DIODE
140-6617
GN
BK
GN
BK
GN
BK
TRAVEL
CUTOFF
117-4861
OR(10)
GN(16)
WH(8)
GG
GG
CAB RISER
SWITCH
133-8327
ALARM
CAB RISER
117-4861
AUX HYD &
CAB RISER
SOLENOID
8U-6424
CAB RISER
(DOWN)
SOLENOID
8U-6424
CAB RISER
(UP)
SOLENOID
8U-6424
TO FRAME
GN/BR(7)
GN(17)
BK/GN(15)
BK
GN/BR(7)
BK/GN(15)
BU(16)
RD(35)
BK
BK
BK
BK
GN(17)
BU(16)
RD(35)
BK/GN/RD(8)
GN/BR(2)
GN(22)
BK/GN(3)
GN/BR(2)
L25
L25
RD(34)
BK/GN(2)
BK/GN(3)
L93
BK(11)
GY(11)
GY(11)
BK(11)
L93
GN(20)
GN(20)
PK(5)
PK(1)
OR(7)
OR(6)
OR(6)
BK
TO FRAME
PK(1)
PK(1)
RD(34)
BK/GN(3)
GN/BR(2)
BU(3)
RD(34)
BK/GN(3)
GN/BR(2)
BU(3)
L92
RD(34)
BK/GN(3)
GN/BR(2)
BU(3)
L92
PK(1)
PK(1)
BK
BK
BU(18)
BU(3)
BK/GN(8)
GN(6)
A
L90
BU(3)
BU(18)
WH(14)
BK/GN(5)
BU(16)
RD(35)
GN(17)
L91
BU(16)
RD(35)
GN(17)
RD(34)
BK/GN(3)
GN/BR(2)
PU(12)
L91
L90
BU(18)
BU(18)
BU(3)
GN/BR(7)
BK/GN(15)
BU(16)
RD(35)
GN(17)
RD(34)
BK/GN(3)
GN/BR(2)
PU(12)
BU(18)
OR(5)
OR(5)
PU(12)
L90
G
G
G
W
C
C
C
A
B
A
A
A
B
B
TRAVEL
ALARM
3T-1815
2
6
3
910
2.5A
ANTENNA
ANTENNA
SPEAKER
GROUND
+BATT.
SPEAKER
SPEAKER
SPEAKER
MOTOR
H
G
53
31B
53A
31
ENGINE
START/STOP
SOLENOID
8C-3663
T
MOTOR
MOTOR
T
POS NEG
NC
NO
C
3
7
2
10 9
4
1
8
+BATTERY
ALARM
PRESS.SW
SHUTDN.SW
GROUND
TRAVEL
ALARM
RELAY
122-2371
BK
BK
BK
BK
BK
> 1 >
> 2 >
> 3 >
> 4 >
POS NEG
+
D+
D-
W
MOTOR
3
7
2
10 9
4
1
8
1 5
9
10
3
7
2
10 9
4
1
8
1 5
9
10
1
5
9
10
1
5
9
10
1
5
9
10
1
5
9
10
1
5
9
10
MOTOR
OUT (LAMP)
+ BATTERY
GROUND
49a
C2
49
C
31
FLASHER
8U-9152
56B
56A
58
31
HEAD
LAMP AS.
2U-4800
POSITION
LAMP
5W-2033
< 6
< 8
< 2
< 3
< 5
< 1
< 7
<
<
<
<
<
<
<
HAZARD SW
5W-9351
10
RD/YL(2)
BK(7)
WH(3)
BK(8)
GN/BR(1)
BK/GN(9)
GY
GY
BK/GN(1)
GN/BR(5)
7,5A
15A
7,5A
7,5A
20A
7,5A
6
5
4
3
2
1
7,5A
7,5A
8
7
FUSE BLOCK 111-2480
D RED
F
E
D
C
B
A
H
G
15A
7,5A
7,5A
15A
7,5A
25A
6
5
4
3
2
1
7,5A
15A
8
7
FUSE BLOCK 111-2478
B YELLOW
F
E
D
C
B
A
H
G
7,5A
7,5A
7,5A
7,5A
7,5A
7,5A
6
5
4
3
2
1
7,5A
7,5A
8
7
FUSE BLOCK 111-2477
A BLACK
F
E
D
C
B
A
H
G
7,5A
7,5A
15A
7,5A
7,5A
6
5
4
3
2
1
7,5A
15A
8
7
FUSE BLOCK 111-2479
C GREEN
F
E
D
C
B
A
H
G
7,5A
A3
B3
B4
B5
B1
C1
HEATER FAN SW
111-3805
2
6
3
910
5
7
9
10
1
5
4
9
10
2
7
5
4
9
10
2
7
1
5
9
10
85
86
30
87
87a
85
86
30
87
87a
85
86
30
87
87a
85
86
30
87
87a
85
86
30
87
87a
85
86
30
87
87a
<
< 04
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
< 05
< 21
< 38
< 27
< 01
< 40
< 03
< 06
< 07
< 08
< 23
< 30
< 32
< 33
< 34
< 02
< 13
< 24
< 25
< 26
< 14
< 22
< 36
< 37
< 35
< 31
< 39
< 29
< 28
< 20
< 19
< 10
< 09
< 18
< 17
< 16
< 15
< 12
< 11
<
< 09
<
< 10
<
< 03
<
< 02
<
< 11
<
< 07
<
< 12
<
< 01
<
< 08
<
< 06
<
< 04
<
< 05
<
< 09
<
< 10
<
< 01
<
< 02
<
< 03
<
< 04
<
< 05
<
< 06
<
< 07
<
< 08
<
< 12
<
< 11
<
< 07
<
< 12
<
< 10
<
< 11
<
< 06
<
< 01
<
< 02
<
< 05
<
< 08
<
< 09
<
< 04
<
< 03
>
<
> +
< -
PLUG
120-5967
24V
12V
GND
5
7
1
9
10
STARTING/
PILOT PRESS
ENABLE SWITCH
117-3187
1
5
9
10
1
5
9
10
15
50A
30
KEY START SWITCH
117-9507
85
86
30
87
87a
+ -
HOUR METER
120-5966
TURN LAMP GP
116-9624
TURN LAMP
5W-2040
BASIC LAMP GP
116-9625
STOP LAMP
9X-4493
TAIL LAMP
5W-2040
TURN LAMP GP
116-9624
TURN LAMP
5W-2040
BASIC LAMP GP
116-9625
STOP LAMP
9X-4493
TAIL LAMP
5W-2040
<
< 01
<
< 02
<
< 03
<
< 04
<
< 05
<
< 06
<
< 04
<
< 03
<
< 02
<
< 01
>
<
> +
< -
PLUG
120-5967
56B
56A
58
31
HEAD
LAMP AS.
2U-4800
POSITION
LAMP
5W-2033
<
<
< 1
< 2
123-6472
2
24V
3
GND
7
TXD
6
RXD
< A <
< B <
< C <
< D <
WH
BR
GN
YL
< E <
SHIELD
BB3
MOTOR
H
G
53
31B
53A
31
<
< 04
<
< 03
<
< 02
<
< 01
<
< 01
<
< 02
<
< 03
<
< 04
<
< 05
<
< 06
4
3
2
1
TERMINAL
5W-3624
TRAVEL LOCK
MAGNET
116-1146
MOTOR
BK
BK
ENGINE SPEED
SENSOR
116-6680
< 1 <
< 2 <
< 1 <
< 2 <
< 3 <
> 1 >
> 2 >
BK
BK
RELAY
3E-0075
T
> 1 >
> 2 >
BK
BK
RELAY
3E-0075
<
< 04
<
< 03
<
< 02
<
< 01
<
< 02
<
< 01
<
< 04
<
< 03
<
< 02
<
< 01
<
< 04
<
< 03
T
HYD OIL
LOW-TEMP
SWITCH
119-3400
85
86
30
87
87a
HORN/TURN
HIGH BEAM SW
111-1975
GN/BR
YL
WH/BK
BK/WH
BK/GN
BK/WH/GN
WH
BR
56B
71A
56
R
L
54
56A
H
<
< 01
<
< 08
<
< 06
<
< 05
<
< 04
<
< 03
<
< 07
<
< 02
<
< 01
<
< 02
T
T
HYD OIL
HIGH TEMP
SW & SENDER
116-4710
5
3
2
1
DIODE
TEMP
123-3998
A/C
RELAY
123-6527
86
85
30
87
87b
<
< 02
<
< 06
<
< 01
<
< 05
<
< 03
<
< 04
5
7
2
9
10
6
1
8
85
86
30
87
87a
5
3
2
1
DIODE
120-5969
AEC IMPLEMENT
TRAVEL SWITCH
117-0651
1
3
2
BRAKE LIGHT
CUTOFF SW
124-8427
<
<
<
<
BR
BU
POWER
MODE SW
5W-9372
5
7
9
10
1
T
< 2 <
< 1 <
COOLANT TEMP
SWITCH
127-5347
BK
BK
FUEL LEVEL
SENDER
112-7178
SWITCH
127-0925
1
4
2
1
5
9
10
> 1 >
> 2 >
BK-18
RD-18
> 3 >
BU-18
ENGINE
OIL SW
3E-6455
A/C
RELAY
123-6527
86
85
30
87
87b
<
<
< 1
< 2
BK
BK
< 1 <
< 2 <
PRIMARY
STEERING
FLOW SW
3E-6429
< 7 <
< 8 <
< 9 <
< 10<
< 11<
< 12<
DUMP VALVE
R TERM (W)
SHUT D SOL
MAGN SWITCH
EMS
UNUSED
SUPPLEMENTAL
STEERING CONTROL
132-6640
< 6 <
< 5 <
< 4 <
< 3 <
< 2 <
< 1 <
STEER SW
STEER SW
GOV.SWITCH
KEY SWITCH
GROUND
BATTERY + RD
BK
YL
OR
BU
PU
BR
WH
PK
GN
GR
85
86
30
87
87a
SWITCH
127-0925
1
4
2
SWITCH
127-0925
1
4
2
LOWER WINDSHIELD
137-7245
BK-14BK-14
<
<
<
<
FUSE
ALTERNATOR
123-8838
70A
MAIN FUSE
124-0016
60A
5
7
9
10
1
5
7
2
9
10
6
1
8
5
7
2
9
10
6
1
8
CONTROL-ENGINE 143-9581
16
SOLENOID (DRE2K)
17
SOLENOID (DRE2K)
01
POS INDICATOR OUT
13
POS INDICATOR IN
19
POS INDICATOR GND
20
NC
03
NC
07
NC
10
NC
11
NC
04
NOMINAL VALUE 1
12
PWM INPUT
22
SIGNAL GROUND
14
NC
23
NC
21
SIGNAL GROUND
06
NOMINAL VALUE GND 2
05
NOMINAL VALUE 2
24
ACTUAL VALUE OUTPUT
09
+ ELECTRONIC
15
OUTPUT STAGE
18
SWITCHING INPUT
02
GND (L0)
08
GND (L0)
1
GND
2
3
TURN SIGNAL
4
TURN SIGNAL
5
POWER MODE III +
6
POWER MODE III -
7
PARKING BRAKE
1
HYD OIL HIGH TEMP
2
+ 24 VOLT
3
POWER MODE II
4
TRANS SPEED II
5
ENG COOL HIGH TEMP
6
POWER MODE I
7
TRANS SPEED I
1
GND
2
NC
3
NC
4
ENGINE OIL PRESS
5
ALTERNATOR
6
NC (+ 24 VOLT)
7
HYD OIL LOW TEMP
1
2
3
4
5
6
7
1
2
3
4
5
6
7
SUPPL STEERING
SUPPL STEERING
HYD FILTER
AIR FILTER
+ 24 VOLT
BRAKE LOW PRESS
OVERLOAD
HYD OIL TEMP
COOL TEMP
FUEL LEVEL
NC
HIGH BEAM
ABC
D
E
MONITOR
PANEL
148-7927
1
3
2
A
B
C
<
<
<
<
<
<
RD
BR
BK
ENGINE
SPEED DIAL
141-6258
MAIN-POWER
157-0836
30
87
86
85
AIR HORN
5W-5883
85
86
30
87
T
< 1 <
< 2 <
A/C TEMP
REGULATOR
3E-5464
> 1 >
> 2 >
BK
BK
SOLENOID
122-2377
GOV ACTR 152-0197
01
SOLENOID (DRE2K)
02
SOLENOID (DRE2K)
01
POS IND OUT
02
POS IND IN
03
POS IND GND
RD
BR
BK
>
01
02
03
04
WH(13)
PU(10)
YL
BR
WH
SHIELD
SHIELD
>
CONTROL-ENG/PUMP 147-8479
40
42
RXD
12
GND (BB3)
07
MODE-III LAMP -
16
GOVERNOR CONTR-SHIELD
19
MODE TEMP.
22
GOVERNOR CONTR-KL.3
32
MAGNET TRAVEL SPEED +
33
MODE-III LAMP +
35
SW-TRAVEL SPEED CONTR
37
BRAKE LIGHT
38
MODE II
39
MODE I
44
GOVERNOR CONTR-KL.1
45
GOVERNOR CONTR-KL.2
51
SWITCH HLC
02
+ 24 VOLT
01
+ 24 VOLT
--
NC
--
NC
--
NC
10
NOMINAL VALUE GND 2
34
NOMINAL VALUE 2
46
--
NC
08
36
SW-TRAVEL PEDAL
--
NC
03
GROUND
04
GROUND
50
SW-PRESS AEC
30
SOLENOID HLC +
09
SOLENOID HLC -
53
18
17
29
06
28
05
ACTUAL VALUE OUTPUT
MAGNET TRAVEL SPEED -
ENGINE SPEED SENSOR
ENGINE SPEED SENSOR
ENGINE SPEED SENSOR
SOL SWING CONTROL +
SOL SWING CONTROL -
SOLENOID VALVE-LS +
SOLENOID VALVE-LS -
MOTOR
MTR BAT
G
S
STARTER
8C-4774
< 1 <
< 2 <
GN-14
GN-14
A/C CLUTCH
SOLENOID
3E-1906
MOTOR
> 2 >
> 1 >
BR-12
BK-12
AIR
CONDITIONER
FAN
145-7724
> 1 >
> 2 >
GN
BU
A/C PRESS
SWITCH
114-5333
> 1 >
> 2 >
ARC
SUPPRESSOR
106-8704
>
>
> 1
> 2
1
2
3
4
DIODE
STOP LAMP
123-5635
5
85
86
30
87
87a
+ V
SIGNAL
GROUND
< 1 <
< 2 <
< 3 <
BR
BK
BU
REVERSE STEER
PROX. SW
151-1953
RD
BK
GY
BU
AUX HYD
SWITCH
113-2531
(CCW ROTATION)
<
< 04
<
< 03
<
< 02
<
< 01
AUX HYD
(CW ROTATION)
RD
BK
GY
BU
CAB RISER
SWITCH
113-2531
(UP)
<
< 04
<
< 03
<
< 02
<
< 01
CAB RISER
(DOWN)
STEP DOOR
SAFETY SW
152-1620
5
7
2
9
10
6
1
8
5
3
2
1
4
DIODE
147-0934
85
86
30
87
87a
<
< 01
<
< 03
<
< 04
<
< 02
<
< 11
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
< 05
< 06
< 07
< 08
< 10
< 09
< 14
< 12
< 16
< 18
< 15
< 17
< 56
< 13
< 01
< 20
< 49
< 69
< 70
< 48
< 57
< 65
< 66
< 67
< 68
< 46
< 47
< 53
< 54
< 30
< 60
< 43
< 44
< 52
< 02
< 39
< 62
< 40
< 41
< 42
< 33
< 58
< 36
< 31
< 38
< 55
< 34
< 50
< 37
< 35
< 27
< 29
< 04
< 26
< 24
< 22
< 21
< 23
< 59
< 45
< 03
< 51
< 64
< 63
< 61
< 28
< 32
< 19
< 25
<
< 30
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
< 10
< 21
< 27
< 12
< 11
< 33
< 36
< 25
< 24
< 23
< 05
< 39
< 40
< 16
< 28
< 29
< 06
< 34
< 14
< 15
< 02
< 09
< 19
< 20
< 01
< 26
< 04
< 08
< 18
< 31
< 32
< 38
< 13
< 35
< 37
< 22
< 17
< 07
< 03
PART-NO. LOC
A 146-1526 C-5
B 146-1522 C-5
C 146-1523 E-6
D 133-2102 C-6
E 120-6922 C-6
F 120-6923 C-6
G 146-1521 B-6
H 139-0549 C-1
J 120-6920 D-2
K
L 119-8301 F-8
M 120-6919 C-1
N 121-0875 F-7
P 121-0876 E-7
R 121-0877 F-7
T 121-0879 F-7
U 122-2360 C-8
V 158-2910 D-7
W 156-9130 E-7
X 122-2364 E-7
Y 121-2973 E-5
Z 121-2972 E-1
AA 122-2365 E-1
BB 122-2366 E-5
CC 122-2382 C-8
DD 8X-9618 E-1
139-8284 B-6
EE 123-6475 C-7
FF 126-6801 F-7
GG 145-9203 C-7
ID
FAN; START AID
START AID
ALL WIRE IS 16 GAUGE
CONN 1
CONN 2
CONN 6
CONN 7
CONN 5
CONN 3
CONN 4
(155-7850) (CH 00)
THIS SCHEMATIC IS FOR THE M318 EXCAVATOR
HARNESS FOR M318 HARNESS FOR M320
TXD
NOTE B:
NOTE B: THE PART NUMBER SHOWN IS FOR THE M318 THE M320 USES 147-8481
ALL DASHED LINES ARE ATTACHMENTS.
WIRES THAT HAVE BATTERY VOLTAGE
WHEN THE KEY SWITCH IS OFF.
WIRES THAT HAVE BATTERY VOLTAGE
WHEN THE KEY SWITCH IS ON.
STARTING CIRCUIT.
MONITOR CIRCUIT.
PANEL LAMP CIRCUIT.
WIPER/WASHER CIRCUIT.
HEATER AND AIR CONDITIONER CIRCUIT.
GROUND CIRCUIT.
ENGINE AND PUMP CONTROL CIRCUIT.
TURN SIGNAL CIRCUIT.
WIRES THAT HAVE BATTERY VOLTAGE
WHEN THE KEY SWITCH IS ON AND THE
LEFT HAND HYDRAULIC CONSOLE IS
LATCHED IN THE DOWN POSITION.
START AID CIRCUIT.
9 8 7
3 2 1
6 5 4
A
B
C
F
E
D
13 26 5 49 8 7
F
E
D
C
B
A
PART-NO. LOC
A 158-7449 C-5
B 146-1525 C-5
C 146-1523 E-6
D 133-2102 C-6
E 139-8282 C-6
F 139-8283 C-6
G 146-1524 B-6
H 139-0549 C-1
J D-2
K
L 140-1059 F-8
M 120-6919 C-1
N 121-0875 F-7
P 121-0876 E-7
R 121-0877 F-7
T 121-0879 F-7
U 122-2360 C-8
V 158-2910 D-7
W 156-9130 E-7
X 122-2364 E-7
Y 138-4515 E-5
Z 138-4514 E-1
AA 122-2365 E-1
BB 122-2366 E-5
CC 122-2382 C-8
DD 8X-9618 E-1
139-8284 B-6
EE 123-6475 C-7
FF 126-6801 F-7
GG 145-9203 C-7
ID
