M320 WHEELED EXCAVATOR ELECTRICAL SYSTEM SCHEMATIC (USED IN SERVICE MANUAL SENR1940)

RENR1166-01
January 2001
M320 Excavator
Electrical System
6WL1-468
©
2001 Caterpillar
All Rights Reserved
Printed in U.S.A.
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.
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 - Coolant Temp C-8 2
Motor - Heater Fan B-5 10 Switch - Creeper Speed C-4 C
Motor - Suppl Steer F-7 4 Switch - Disconnect F-8 3
Motor - Washer (Lower) E-8 11 Switch - Dome Light E-2 A
Motor - Washer (Upper) E-8 3 Switch - Engine Oil Pressure C-8 8
Motor - Wiper (Lower) D-1 12 Switch - Forward/Reverse Travel Alarm (2) F-4 21
Motor - Wiper (Upper) D-2 A Switch - Front Flood Lamp C-3 C
Regulator - A/C Temp B-6 10 Switch - Hammer B-5 C
Relay - A/C Clutch D-8 D Switch - Hazard B-3 C
Relay - A/C Fan D-8 D Switch - Head Lamp C-3 C
Relay - AEC Aux Hyd E-5 D Switch - Heater Fan B-6 C
Relay - Air Horn D-4 D Switch - Heavy Lift B-6 C
Relay - Brake E-4 D Switch - Horn/Turn/High Beam F-2 A
Relay - Brake/Travel Cutoff D-3 D Switch - Hydraulic Oil Filter Clog D-9 24
Relay - Main Power E-4 D Switch - Hydraulic Oil High Temp Sender D-9 23
Relay - Pilot Pressure Enable E-4 D Switch - Hydraulic Oil Low Temp D-9 23
Relay - Power Mode E-4 D Switch - Key Start C-4 C
Relay - Start C-9 5 Switch - Low Brake Pressure F-3 21
Relay - Start/Stop D-4 D Switch - Low Transmission Clutch Pressure E-8 11
Relay - Stop Lamp D-4 D Switch - Overload Warning Device B-3 25
Relay - Suppl Steer E-8 D Switch - Overload Warning Device B-5 C
Relay - Suppl Steer F-8 4 Switch - Parking Brake B-3 C
Relay - Temp D-4 D Switch - Pilot Control Lock B-3 B
Relay - Trans Speed E-4 D Switch - Power Mode C-4 C
Relay - Travel Alarm E-3 D Switch - Primary Steering Flow F-3 21
Relay - Travel Cutoff D-3 D Switch - Rear Flood Lamp C 3 C
Resistor (Backup) - Main Pump Prv D-6 D Switch - Refueling Pump E-3 D
Resistor (Backup) - Swing Pump Prv D-6 D Switch - Reverse Steer Prox B-3 26
Resistor - Heater Fan B-5 10 Switch - Stabilizer Lockout (Left Front) B-5 C
Reverse Steer Light F-2 A Switch - Stabilizer Lockout (Left Rear) B-5 C
Sender - Coolant Temp C-8 2 Switch - Stabilizer Lockout (Right Front) B-6 C
Sender - Fuel Level E-9 13 Switch - Stabilizer Lockout (Right Rear) B-6 C
Sensor - Engine Speed C-9 14 Switch - Start Aid B-6 C
Solenoid - A/C Clutch D-8 15 Switch - Starting/Pilot Press Enable D-3 B
Solenoid - Aux Hyd (CCW) F-9 16 Switch - Swing Brake B-3 A
Solenoid - Aux Hyd (CW) F-9 16 Switch - Trans Speed C-4 C
Solenoid - Blade Front E-1 27 Switch - Travel Alarm Cancel B-3 C
Solenoid - Blade Rear F-6 17 Switch - Travel Lock B-4 C
Solenoid - Creeper Speed E-9 16 Switch - Travel Pedal F-2 A
Solenoid - Engine Start/Stop D-8 6 Switch - Windshield (Lower) D-2 A
Solenoid - Hammer D-8 16 Switch - Windshield (Upper) D-2 A
Solenoid - Heavy Lift D-9 16 Switch - Wiper (Lower) B-4 C
Solenoid - Implement Activation E-9 16 Switch - Wiper (Upper) B-4 C
Solenoid - Main Pump Prv E-8 16 Swivel F-5 22
Solenoid - Parking Brake E-8 11
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
Connector Location
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 D-1 28
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.
Off Machine Switch Specifications
Part No. Function Actuate Deactuate
Contact Position
3E-6429 Supplemental Steering Oil Flow
4 grams
1.5 grams
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-21 58 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 - Backup
Resistor - Backup
Sender - Engine Coolant Temp
Sender - Fuel Level
Sender - Hydraulic Oil Temp
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.
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
D97416
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
18
19
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
18
19
7
Machine Harness Connector and Component Locations
1
1
BK/GN(8)
BU-10(1)
RD-6(4)
GN/BR(4)
GN/BU(1)
BK/GN(4)
GN/WH(2)
BU/YL(3)
GN/BR(3)
BK/GN(6)
GN/BU(5)
BK/GN(7)
BK/WH(3)
BK/YL/WH(2)
BK-6
RD(31)
RD-12
BK(5)
BK(4)
BK(3)
BK(2)
WH(7)
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)
BK-6
L33
L28
L29
L30
L31
L32
L27
RD-12
RD(31)
L86
RIGHT REAR
STABILIZER
LOCKOUT SOL.
8U-6424
LEFT REAR
STABILIZER
LOCKOUT SOL.
8U-6424
L34
WH(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)
BU(13)
BK(14)
BK/GN(6)
L6
L22
L19
L23
L6
L86
L86
BU(13)
GN/BR(3)
RD(12)
GY(6)
GY(5)
WH(4)
BK(9)
BK(14)
WH(7)
RD(25)
L26
BR
BU
BR
BU
BR
DK-BU
GN/YL
BK
BR
GN/YL
DK-BU
BK
AA
Y
<< 04
<
< 03
<< 02
<< 01
< 01
BLADE REAR
SOLENOID
8U-6424
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(2)
BK/GN(3)
BK/WH(1)
WH(3)
BK(8)
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)
PU(2)
GN/BU(1)
BR/WH(3)
BK/GN(5)
BK/WH(1)
YL(4)
GN/BR(2)
BK/GN(3)
BK/GN/RD(3)
BK/YL/WH(1)
L20
L21
L22
L19
L18
L37
L38
L39
L41
L40
L36
L33
WH(6)
BK/GN(6)
GN/BU(5)
WH(6)
WH(5)
C
A
BK(9)
WH(4)
L33
RD-8(2)
KL.15
L86
L86
<< 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
CONN 4
WH(6)
WH(5)
BK/YL/WH(2)
BK/WH(3)
BK/GN(7)
GN/BU(5
)
BK-4
WASHER
UPPER
8U-2598
WASHER
LOWER
8U-2598
L24
L23
L18
C
C
RD-00
L86
WH(15)
W
MOTOR
MOTOR
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)
BK(9)
BK
RD(12)
GY(5)
GY(6)
WH(4)
RD(12)
GY(6)
GY(5)
WH(4)
BK(9)
BK
BU-10(1)
BK/GN(8)
BK/GN(8)
BU-10(1)
BK
FUEL
PUMP
5W-8633
RD-00 BK-00
BK-00
RD-6(4)
DISCONNECT
SWITCH
7N-0718
12V BATTERY
(QNTY 2)
3T-5760
BK
GN(4)
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)
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
TO FRAME
RD-00
OR(4)
BK(17)
PU(6)
BK(16)
SWING PUMP PRV
SOLENOID
123-0156
MAIN PUMP PRV
SOLENOID
123-0156
PU(9)
TO FRAME
BK
BK
GN/BR(2)
BK/GN(3)
GN/BR(2)
BK/GN(3)
BK/GN/RD(3)
BK/YL/WH(1)
CREEPER
SPEED
SOLENOID
8U-6424
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
HAMMER
SOLENOID
8U-6424
BK
WH(1)
BK
BK
BK
BK
BK
HYD OIL
FILTER
CLOG SW
116-8514
BU(7)
RD(9)
BR/BK(1)
BR/BK(1)
RD-4
BK-10
TO BOX BK-6
TO FRAME
YL (15)
YL(13)
RD-12
BK
BK-12
BR-12
L10
BK
BK
L26
21
L17
L24
L16
L17
L43
L44
L6
L18
L19
L42
L42
L82
L20
L21
PU(3)
WH(5)
BK/YL/WH(2)
BK/WH(3)
BK/GN(7)
GN/BU(5)
BK/GN(6)
BK/YL/WH(2)
BK/GN(7)
BK/WH(3)
LA
A
C
A
W
C
G
G
C
C
D
D
D
D
V
V
V
C
C
W
D
W
W
X
X
P
FF
R
R
T
W
FF
N
SUPPL STER
AUX HYD
(CW ROTATION)
SOLENOID
8U-6424
OR(3)
OR(3)
OR(4)
PU(6)
YL(17)
WH(12)
BK(17)
BK(16)
L82
L83
RD-00
PU(12)
BK
TO FRAME BK
GN(4)GN(4)
DV
FAN
CLUTCH
L86
BK
BK
RD(8)
RD(32)
WH(15)
GN(14)
BK
BK
GN(15)
BK
BK
SUPPL STER
RELAY
117-4861
W
PU(12)
BK-12
DIODE
140-6617
TRAVEL
ALARM
3T-1815
MOTOR
T°
POS NEG POS NEG
MOTOR
<< 04
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
< 05
< 21
< 38
< 27
< 01
< 40
< 03
< 06
< 07
< 08
< 23
< 30
< 32
< 33
< 34
< 02
< 13
< 24
< 25
< 26
< 14
< 22
<< 01
<< 02
<< 03
<< 04
<
< 05
<< 06
< 1 <
< 2 <
< 3 <
< 1 <
< 2 <
BK
BK
RELAY
3E-0075
MOTOR
< 2 <
< 1 <
BR-12
BK-12
AIR
CONDITIONER
FAN
122-2375
T°
HYD OIL
LOW-TEMP
SWITCH
119-3400
T
T
HYD OIL
HIGH TEMP
SW& SENDER
116-4710
A/C
RELAY
123-6527
86
85
30
87
87b
FUEL LEVEL
SENDER
112-7178
<
<
<
<
<
<
<
< 13
< 35
< 37
< 22
< 17
< 07
< 03
A/C
RELAY
123-6527
86
85
<
<
< 1
< 2
A/C PRESS
SWITCH
133-1331
< 7 <
< 8 <
< 9 <
< 10 <
< 11 <
< 12 <
DUMP VALV E
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
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)
OR(12)
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)
L40
L36
L37
L86
L38
L39
L71
L74
L73
L72
A
A
A
A
F
L85
RD(28)
RD(28)
RD(29)
BU(15)
GN(7)
BACKUP RESISTOR
MAIN PUMP PRV
143-8251
BACKUP RESISTOR
SWING PUMP PRV
143-8251
RD-8(3)
RD-10(2)
KL.30
RD-10(5)
RD-10(4)
RD-10(3)
RD-10(8)
RD-10(7)
F
FF
F
BK/GN(3)
GN/BR(2)
PU(12)
BK/GN(14)
GN/BR(6)
PU(12)
L87
A
FF
RD(31)
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
7,5A
8
7
FUSE BLOCK 111-2479
C GREEN
F
E
D
C
B
A
H
G
7,5A
RD-6(4)
GN/YL
GN/YL
BR
DK-BU
BK
BK(4)
BK(3)
BK(2)
BK(1)
TO UNDCRGBR
BU
BB
Y
Z
Y
4
3
2
1
TERMINAL
5W-3624
<
< 04
<< 03
<< 02
<
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
CREEPER SPEED
SWITCH
5W-9347
YL(5)
RD/YL(30)
BK
BK
BK/GN(11)
BK/WH(1)
RD/YL(31)
BK
PU(1)
WH(6)
WH(5)
BK/WH(3)
GN(8)
BK
WH(5)
WH(6)
BK/GN(7)
BU(10)
GN(9)
BK
RD(2)
GN(10)
RD(3)
RD(2)
YL(1)
YL(9)
BK
GY
BK(2)RD/YL(5)
BK
RD/YL(29)
GY
BK
BK(4)
BK(5)
BK(3)
RD/YL(5)
BK(2)
RD/YL(7)
YL(1)
WH(1)
GY
GN(1)
RD/YL(3)
BK
PU(8)
RD(21)
RD(21)BK
GY(1)
GYBK
YL(7)YL(13)
BK
YL(11)
YL(12)
BU(10)
GN(9)
BK
RD(21)
PU(8)
BR
SHIELD
BR
GN
WH
SHIELD
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(2)
PU(2)
BK/WH(1)
BK/GN/RD(2)
BK/GN(2)
BK/GN(3)
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/BR(2)
GN(2)
RD/YL(8)
BK/GN/RD(1)
GY(1)
STOP LAMP
117-4861
AIR HORN
5W-5883
START/STOP
117-4861
BRAKE
117-4861
TRANS SPEED
117-4861
TEMP.
117-4861
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)
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)
GN/BR(2)
BK/GN(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(5)
BK(6)
WH(2)
BU(2)
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)
OR(12)
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)
OR(12)
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(6)
RD(15)
BK
BK
BK
RD(14)
BU(10)
BU(8)
WH(7)
OR(13)
OR(12)
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(8)
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)
BK/GN(2)
BK/GN(4)
BK/GN(5)
RD(6)
BR(1)
BK/GN(5)
RD(6)
BR(1)
RD-8(1)RD-8(2)
RD-8(1)RD-8(3)
BK(9)
BK
BK
RD(12)
RD(26)
BK
BK
GY(5)
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)
GY(6)
WH
GN
BR
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)
RD(23)
WH(10)
BR(2)
BK(13)
BK(13)
RD(22)
RD(22)
BK/WH(7)
BK/WH(2)
RD/YL(10)
RD(6)
BU(1)
RD(25)
BK(2)
BK(3)
BK(4)
BK(5)
BK
BK(1)
BK(2)
BK(3)
BK(4)
GN/YL
RD(12)
RD(12)
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)
GN(1)
BR/WH(2)
GN(2)
PU(8)
BK
TO FRAME
RD-00
WH(5)
PU(9)
SHIELD
BR
WH
WH
BR
SHIELD
BK
BK
BK/GN/RD(3)
BK/YL/WH(1)
IMPLEMENT
ACTIVATION
SOLENOID
8U-6424
TRAVEL
ACTIVATION
SOLENOID
8U-6424
SWING
BRAKE
SOLENOID
8U-6424
HEAVY LIFT
SOLENOID
8U-6424
RD(24)
BK(15)
PU(13)
PU (8)
GN(1)
BR/WH(2)
GN(2)BR/WH(2)
AIR FILTER
CLOG SW
5W-9934
RD(7)
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
BK-6
GN(4)
BK
OR(8)
YL(16)
YL(13)
YL(15)
YL(16)
L1
L4
L4
L1
L6
L7
L7
L8
L8
L9
L9
L10
L10
L11
L12
L12
L11
L4
L1
BK
L15
L14
L14
L15
L16
L13
L13
L46
L45
L13
L46
L31
L31
L30
L29
L28
L27
L65
L66
L66
L67
L56
L65
L57
L55
L45
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
L51
L50
L87
L43
L38
L39
L43
L47
L32
L51
L32
L34
L30
L51
L36
L48
L29
L36
L50
L59
L58
L53
L55
L67
L72
L73
GY
GY
GN
WH
PU(3)
PU(3)
L76
L76
OR(2)
BK
BK
GN(13)
GN(13)
L78
L48
BK/RD(2)
L
L
C
C
C
C
G
G
G
L
L
D
D
D
D
D
D
D
U
U
D
D
D
N
D
DD
D
G
G
G
G
G
G
D
A
F
E
SWIVEL
121-2974
D
A
F
A
F
A
F
A
A
A
A
A
A
A
A
A
A
A
L46
L44
L50
L48
A
A
B
E
B
E
B
B
B
B
B
B
B
B
B
B
E
CC
YL(9)
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
OR(3)
OR(3)
BU(9)
BK/WH(4)
GY
BR/BK(2)
BR/WH(3)
YL(11)
YL(12)
PU(3)
BK/RD(2)
L80
RD(27)
DIODE
8U-8045
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)
L83
L84
L84
L83
L85
OR(6)
OR(5)
OR(5)
GY
BK
E
B
E
EG
PU(12)
PU(12)
TO CAB
GN/BR(6)
BK/GN(14)
PU(12)
BK
OR(5)
BK
AEC AUX-HYD
BRAKE
AEC
AUX-HYD
117-4861
L86
BK
GY
GY
BK-10
BK
BK-10
BK-10
EE
BK-10 SHIELD
K
K
G
G
FF
L47
RD(27)
RD(30)
PU(11)
PU(2)
PU(2)
RD(31)
V
RD(31)
RD(31)
L86
L86
WH(15)
WH(15)
W
AEC BOOM-CYL
AEC STICK-CYL
AEC SWING
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
OR(12)
BU/YL(2)
YL(10)
BU/YL(5)
POWER
MODE SW
139-8289
BK
OR(11)
EB
BU/YL(5)
YL(10)
L80
L80
YL(10)
OR(11)
YL(5)
BU(9)
YL(5)
BU(9)
OR(11)
OR(11)
OR(11)
L80
ENGINE
START/STOP
SOLENOID
8C-3663
3
7
2
10 9
4
1
8
< 1 <
< 2 <
BK
BK
ETHER START
SOLINOID
122-2377
+
D+
D-
W
3
7
2
10 9
4
1
8
15
9
10
15
9
10
OUT (LAMP)
+ BATTERY
GROUND
49a
C2
49
C
31
FLASHER
8U-9152
MOTOR
MTRBAT
GS
STARTER
8C-4774
A3
B3
HEATER FAN SW
111-3805
5
7
5
4
9
10
2
7
8586
30
87
87a
85
86
30
87
87a
85
86
30
87
87a
85
86
30
87
87a
8586
30
87
87a
85
86
30
87
87a
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
< 36
< 37
< 35
< 31
< 39
< 29
< 28
< 20
< 19
< 10
< 09
< 18
< 17
< 16
< 15
< 12
< 11
<
< 09
<< 10
<
< 01
<< 02
<< 03
<
< 04
<< 05
<< 06
<
< 07
<< 08
<< 12
<< 11
<< 07
<< 12
<< 10
<
< 11
<< 06
<< 01
<
< 02
<< 05
<< 08
<< 09
<< 04
<
< 03
15
9
10
1
5
9
10
15
50A
30
KEY SWITCH
117-9507
85
86
30
87
87a
TURN LAMP GP
116-9624
TURN LAMP
5W-2040
BASIC LAMP GP
116-9625
STOP LAMP
9X-4493
TAIL LAMP
5W-2040
GOV ACTR 112-7593
01SOLENOID (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
>
123-6472
2
24V
3 GND
7
TXD
6
RXD
< A <
< B <
< C <
< D <
WH
BR
GN
YL
< E <
BB3
<
< 01
<< 02
<< 03
<< 04
<< 05
<
< 06
BK
BK
ENGINE SPEED
SENSOR
6V-2455
< 1 <
< 2 <
< 1 <
< 2 <
BK
BK
RELAY
3E-0075
5
3
2
1
DIODE
TEMP
123-3998
1
2
3
4
DIODE
STOP LAMP
123-5635
5
FUSE
ALTERNATOR
123-8838
70A
MAIN FUSE
124-0016
60A
5
7
2
9
10
6
1
8
85
86
30
87
87a
5
3
2
1
DIODE
120-5969
5
3
2
1
DIODE
120-5969
AEC IMPLEMENT
TRAVEL SWITCH
117-0651
1
3
2
MAIN-POWER
120-5970
30
87
86
85
T
TT
< 2 <
< 1 <
COOLANT TEMP
SWITCH
127-5347
BK
BK
SWITCH
127-0925
1
4
2
15
9
10
< 1 <
< 2 <
BK-18
RD-18
< 3 <BU-18
ENGINE
OIL SW
3E-6455
30
87
87b
< 1 <
< 2 <
GN-14
GN-14
A/C CLUTCH
SOLENOID
3E-1906
< 1 <
< 2 <
GN
BU
SWITCH
127-0925
1
4
2
SWITCH
127-0925
1
4
2
CONTROL-ENGINE
139-5688
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
57
57
1
9
10
3
1
9
10
5
7
2
6
8
<
< 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
< 23
< 40
< 41
< 42
< 33
< 58
< 36
< 31
< 38
< 55
< 34
< 50
< 37
< 35
< 27
< 29
< 04
< 26
< 24
< 22
< 21
< 62
< 59
< 45
< 03
< 51
< 64
< 63
< 61
< 28
< 32
< 19
< 25
CONTROL-ENG/PUMP
127-9854
40 TXD
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 ACTUAL VALUE OUTPUT
--
NC
08
MAGNET TRAVEL SPEED -
49
MODE III
<< 02
<
< 06
<< 01
<< 05
<
< 03
<< 04
<
< 08
<< 07
SHIELD
SHIELD
CONN 1
CONN 2
CONN 3
CONN 6
CONN 5
1PARKING LIGHTS RHS 7,5
FUSE "A" BLACK
1 ELECTRICAL FUEL LIFT PUMP 25
FUSE "B" YELLOW
PA RT-NO. LOC
A 139-8281
B 135-4593
C 135-4595
D 133-2102
E 139-8282
F 139-8283
G 135-4590
BK
GY
GY
BK(12)
BK/GN(10)
GY(7)
BK(12)
GN(8)
GY
BK
RD/YL(7) WH(1)RD/YL(27)
BK(3)
GY
RD/YL(28)
BK
GY
BK(5)
RD/YL(26)TO FRAME
GY
BK BK
PU(8)BK
YL(7)
YL(13)
YL(8)
BU(11)
RD(20)
BK(10)
BK
BK
RD(24)
RD(1)
BU(4)
YL(10)
BU/YL(5)
BK(6)
WH(2)
WH(4)
BK
GY(6)
BK
BK
RD(26)
BK
RD(26)
BU(11)
RD(20)
BK(10)
BK
YL(13)
BK
WH
RD
BK
BR
RD(23)
BK
BU(13)
BK
BK
PU(9)
RD(24)
BK(15)
WH
BR
SHIELD
WH(12)
BK(16)
YL(17)
BK(17)
BK
BK
BK(15)
PU(9)
SHIELD
BR
WH
YL(17)
BK(17)
WH(12)
BK(16)
YL(15)
YL(16)
YL(13)
L1
L3
L3
L1
L4
L5
L5
L67
L49
L68
L67
L55
TO FRAME
HEATER FAN
122-2372
RESISTOR
122-2373
L
L
G
B
V
V
<<
B
B
B
B
B
B
RD(27)
RD(27)
GY
L4
L1
L7
BK-10
K
GN(3)
HARNESS AS
DIODE
142-9472
15
9
10
15
9
10
1
5
9
10
MOTOR
B4
B5
B1
C1
4
9
10
2
15
9
10
TURN LAMP GP
116-9624
TURN LAMP
5W-2040
BASIC LAMP GP
116-9625
STOP LAMP
9X-4493
TAIL LAMP
5W-2040
<< 04
<< 03
<< 02
<
< 01
T°
< 1 <
< 2 <
A/C TEMP
REGULATOR
122-2374
09 + ELECTRONIC
15
OUTPUT STAGE
18 SWITCHING INPUT
02 GND (L0)
08
GND (L0)
1
9
10
36 SW-TRAVEL PEDAL
03
GROUND
04 GROUND
50 SW-PRESS AEC
30
SOLENOID HLC +
09 SOLENOID HLC -
53
ENGINE SPEED SENSOR
18
ENGINE SPEED SENSOR
17 ENGINE SPEED SENSOR
29
SOL SWING CONTROL +
06 SOL SWING CONTROL -
28 SOLENOIDVALVE-LS +
05
SOLENOIDVALVE-LS -
ID
C-6
C-6
E-7
C-7
C-7
C-7
B-7
COMPONENTS ARE SHOWN INSTALLED ON A FULLY
OPERABLE MACHINE WITH THE KEY AND ENGINE OFF.
UNLESS OTHERWISE SPECIFIED:
AWG MM*2
050
416
610
86
10 4
12 2.5
14 1.5
16 1
00 70
ABBREV
BK BLACK
COLOR
BR BROWN
BU BLUE
GN GREEN
GY GRAY
OR ORANGE
PK PINK
PU PURPLE
RD RED
WH WHITE
YL YELLOW
2PARKING LIGHTS LHS 7,5
3INSTRUMENT LIGHTING 7,5
4LOW BEAM RHS 7,5
5LOW BEAM LHS 7,5
6HIGH BEAM RHS 7,5
7HIGH BEAM LHS 7,5
8 CONTROL LIGHTS; TURN SIGNAL 7,5
2WARNING LIGHT;STA RT/STOP SOLENOID 7,5
3STA RTER KEY SWITCH; MAIN POWER-RELAY; LIGHT15
4POTENTIAL TRANSFORMER 24V ==> 12V (RADIO) 7,5
5STA RT/STOP RELAY 7,5
6 COMPRESSOR AIR HORN 15
7FAN; ETHER START1 5
8CIGARETTE LIGHTER; PLUG;DOME LIGHT 7,5
1BACKUP 7,5
2POWER MODE SELECTION 7,5
3INDIVIDUAL STABILIZERS 7,5
4WORKING LIGHTS1 5
5HAMMER BLOW FREQUENCY ADJUST.; FLOW CONTROL 7,5
6ELECTRONICS 7,5
7ROTATING BEACON 15
8AIR SUSPENDED DRIVER SEAT; PRIORITY 7,5
FUSE "C" GREEN
1STOP LIGHT 7,5
2AIR 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; RELAYTRAVEL CUT OFF; PARK BRAKE;
TRANSMISSION SPEED; CREEPER SPEED; CAB-RISER
H 139-0549 C-1
J
K
L 140-1059
M 120-6919
N 121-0875
P 121-0876
R 121-0877
T 121-0879
U 122-2360
V 143-5031
W 132-7212
X 122-2364
Y 138-4515
Z 138-4514
AA 122-2365
BB 122-2366
CC 122-2382
DD 8X-9618
139-8284
EE 123-6475 C-7
FF 126-6801
C-8
F-9
D-1
F-8
E-8
F-8
F-8
C-9
D-8
F-8
F-8
F-6
F-1
F-1
F-6
C-9
F-1
F-8
L# CIRCUIT GROUPING
DESIGNATION
ATCH WIRE, CABLE,
COMPONENT
CIRCUIT NOT CONNECTED
CIRCUIT CONNECTED
BLADE, SPADE, RING,
OR SCREW TERMINAL
INTERNAL ELECTRICAL
CONNECTIONTO SURFACE
OF COMPONENT
ELECTRICAL CONNECTION
CONNECTOR
SYMBOL DESCRIPTION
NOTE A:
COMPONENTS ARE SHOWN INSTA LLED ON A FULLY
TO MACHINE STRUCTURE
OPERABLE MACHINE WITH THE KEY AND ENGINE OFF.
UNLESS OTHERWISE SPECIFIED: ALLWIRE IS 16 GAUGE
SWITCH SHOWNWITH NO HYDRAULIC DEMAND
NOTE:
OF THE SWITCH DEPRESSED, AS SEEN FRON THE OPERATORS SEAT.
ALL CONSOLE SWITCHS ARE SHOWN WITH THE FRONT
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
PARKING
BRAKE SW
8U-6353
SWING BRAKE
SWITCH
8U-6353
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(2)
PU(2)
BK/WH(1)
BK/GN/RD(6)
BK/GN(3)
BK/G
N(2)
GN/B
U
(5)
BK/GN(6)
BK/GN/RD(2)
BK/GN/RD(5)
BK
BK
BK/GN(3)
OR(2)
GN/BR(2)
BK/RD(1)
REFUELING
PUMP SWITCH
8U-3011
TO BOX
BK/GN/RD(4)
BK
WH(14)
YL(4)
WH(9)
WH(2)
RD/YL(13)
BK/GN(8)
BK/WH(2)
BK(6)
BU-10(2)BU-10(1)
RD/YL(16)
BK
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)
BU(2)
RD(7)
BU/YL(4)
RD(9)
BU(7)
GN(5)
WH(7)
BU(8)
BU(10)
GN(6)
RD(10)
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
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)
LOWERWIPER
6C-9156
RD(6)RD/YL(10)BK
BK BK
BU(1)
FORWARD/REVERSE
TRAVEL ALARM
SW (QNTY 2)
9D-7032
BRAKE
LIGHT SW
8U-2158
LOW BRAKE
PRESS SW
5W-9972
RD(25)
BK
BK
TO FRAME
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(18)
BK(18)
BK(14)
WH(7)
FORWARD
HORN
6C-5859
BK(1)
RD(7)
BK
BK
COMPRESSED
AIR HORN
5W-9400
0
TO CABTO FRAME
L1
L2
L2
L30
L51
L46
L44
L52
L52
L46
L34
L28
L27
L34
L34
L28
L28
L60
L54
L70
L61
L70
L64
L63
L62
L70
L68
L63
L68
L68
L68
L64
L75
L75
AIR SUSPENDED
DRIVER SEAT
GY
BK
BR
BU
BLADE FRONT
SOLENOID
8U-6424
BK/YL/WH(1)
WH(14)
GN(13)
BK
L77
L77
L77
L78
BRAKE/
TRAVEL
CUTOFF
117-4861
BK
BU(13)
BK
WH
BK
WH
C
C
C
C
W
G
C
K
C
C
BB
Z
AA
H
C
C
C
D
DM
D
D
D
D
D
D
H
H
H
H
H
H
H
H
H
B
B
B
B
H
B
B
A
A
A
A
A
A
F
B
B
B
B
B
B
B
B
B
B
DD
YL(9)
GN(10)
AUX HYD
(CW ROTATION)
SWITCH
122-1903
AUX HYD
(CCW ROTATION)
SWITCH
122-1903
Z
BR/RD
BR
BR
BR/RD
BK-14
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)
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
L79
L79
L79
L81
L81
L81
L81
L55
L69
L69
L69
L35
L35
RD
BK
BU
GY
BK
BK
YL(10)
BU/YL(5)
GN/BR(2)
2
6
3
910
2.5A
ANTENNA
ANTENNA
SPEAKER
GROUND
+BAT T.
SPEAKER
SPEAKER
SPEAKER
MOTOR
H
G
53
31B
53A
31
NC
NO
C
+BATTERY
ALARM
PRESS.SW
SHUTDN.SW
GROUND
TRAVEL
ALARM
RELAY
122-2371
BK
BK
BK
BK
BK
> 1 >
> 2 >
> 3 >
> 4 >
15
9
10
3
7
2
10 9
4
1
8
15
9
10
GROUND
+BATTERY
TRAVEL SOL
PA RK SW
PA RK LIGHT
1
3
2
6
4
5
TRAVEL
CUTOFF
RELAY
8U-7440
2
6
4
5
1
3
7
8
NC
NC
NC
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)
2
6
3
910
<< 09
<< 10
<< 03
<
< 02
<< 11
<< 07
<
< 12
<< 01
<
< 08
<< 06
<< 04
<
< 05
>
<
>+
<-
PLUG
120-5967
24V
12V
GND
STARTING/
PILOT PRESS
ENABLE SWITCH
117-3187
+-
HOUR METER
120-5966
>
<
> +
< -
PLUG
120-5967
56B
56A
58
31
HEAD
LAMP AS.
2U-4800
POSITION
LAMP
5W-2033
<
<
< 1
< 2
MOTOR
H
G
53
31B
53A
31
TRAVEL LOCK
MAGNET
116-1146
+V
SIGNAL
GROUND
< 1 <
< 2 <
< 3 <
BR
BK
BU
REVERSE STEER
PROX.SW
121-0797
<< 02
<
< 01
<< 04
<< 03
<< 02
<< 01
<
< 04
<< 03
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
BRAKE LIGHT
CUTOFF SW
124-8427
<<
<<
BR
BU
>
>
>>
>>
>
>
BK
BK
< 1 <
< 2 <
PRIMARY
STEERING
FLOW SW
3E-6429
5
7
1
9
10
LOWER WINDSHIELD
137-7245
BK-14BK-14
<
<
<
<
1
GND
2
3
TURN SIGNAL
4
TURN SIGNAL
5
PO
WER MODE III +
6
POWER MODE III -
7
PA RKING BRAKE
1
HYD OIL HIGH TEMP
2
+ 24 VOLT
3
PO
WER 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 FIL
TER
AIR FILTER
+ 24 VOLT
BRAKE LO
W PRESS
OVERLOAD
HYD OIL TEMP
COOL
TEMP
FUEL LEVEL
NC
HIGH BEAM
ABC
D
E
MONITOR
PA NEL
143-6855
1
3
2
< A <
< B <
< C <
RD
BR
BK
ENGINE
SPEED DIAL
141-6258
5
7
2
9
10
6
1
8
5
7
2
9
10
6
1
8
SHIELD
CONN 7
THIS SCHEMATIC IS FORTHE M320 EXCAVATOR
(137-1409) (CH 01)
D96201
ALL WIRE IS 16 GAGE
WIRESTHAT HAVE BATTERYVOLTAGE
WHENTHE KEY SWITCH IS OFF.
WIRESTHAT HAVE BATTERYVOLTAGE
WHENTHE KEY SWITCH IS ON.
STARTING CIRCUIT.
MONITOR CIRCUIT. (EMS)
PANEL LAMP CIRCUIT.
WASHER/WIPER CIRCUIT.
HEAT ER AND AIR CONDITIONER CIRCUIT.
GROUND CIRCUIT.
TURN SIGNAL CIRCUIT.
ENGINE AND PUMP CONTROL CIRCUIT.
WIRESTHAT HAVE BATTERYVOLTAGE
WHENTHE KEYSWITCH IS ON AND THE
LEFT HAND HYDRAULIC CONSOLE IS
LATCHED IN THE DOWN POSITION.
START AID CIRCUIT.
ALL DASHED LINES ARE AT TACHMENTS.
6 5 49 8 7
13 2 1
36 5 49 8 7 12 1
A
B
C
F
E
D
C
F
E
D
B
A