Error Message Logged Result Of Fault Possible Causes
Main Pump Circt Yes
• 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 Yes
• 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
Swing Pump Yes
• 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 Engn Speed No
• Hydraulic pump outputs are
reduced.
• Signal from engine speed sensor indicates engine speed is below 800 rpm.
• Engine speed sensor 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 Engn Speed Yes
• Engine overload.
• Engine stalls.
• Signal from engine speed sensor indicates engine speed is above 2200 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.
SYSTEM FAULTS DETECTED BY THE CONTROLLER
SENR6266-01
June 1995
M318 Excavator
Electrical System
8AL1-UP
©
1995 Caterpillar
All Rights Reserved
Printed in U.S.A.
Machine
Location
Component
Schematic
Location
62 Alternator C-13
23 Battery (2x) H-12
A Beacon F-1
D Breaker - Circuit G-7
A Cigar lighter F-2
A Control - Engine C-12
A Control - Engine/pump C-11
26 Control - Supplemental steering H-13
A Converter D-3
D Diode - AEC aux-hyd F-7
D Diode - Brake D-6
D Diode - Stop-lamp/creeper-speed E-7
D Diode - Temperature E-6
D Fuse - Block A; B; C; D F-9
68 Fuse - Breaker circuit C-14
72 Governor actuator C-12
11 Horn - Forward C-1
29 Horn - Travel alarm H-14
A Light - Dome F-2
8 Light - Flood lamp D-1
A Light - Flood lamp front cab F-3
A Light - Flood lamp rear cab F-4
5 Light - Head lamp left F-1
12 Light - Head lamp right C-1
49 Light - License plate D-14
A Light - Reverse steering H-3
9 Light - Stick travel lamp D-1
48 Light - Stop/tail lamp left H-14
50 Light - Stop/tail lamp right B-14
47 Light - Turn lamp left H-14
51 Light - Turn lamp right A-14
6 Light - Turn signal left F-1
13 Light - Turn signal right B-1
A Magnet - Travel lock H-2
D Meter - Hour service E-5
A Monitor - PDT C-11
C Monitor panel C-2
55 Motor - Air conditioner fan E-13
25 Motor - Fuel pump H-13
20 Motor - Heater fan A-7
7 Motor - Lower wiper E-1
28 Motor - Supplemental steering H-12
A Motor - Upper wiper E-2
31 Motor - Washer lower G-12
30 Motor - Washer upper G-12
D Plug E-5
10 Plug - Stick travel lamp D-1
A Radio, speaker, antenna F-2
D Relay - AEC aux-hyd F-7
56 Relay - Air conditioner E-12
D Relay - Horn E-7
D Relay - Brake F-6
D Relay - Brake/travel cutoff D-4
D Relay - Creeper Speed E-7
D Relay - Flasher/warning light F-6
D Relay - Main power F-6
Component Location
Machine
Location
Component
Schematic
Location
D Relay - Pilot press enable F-6
D Relay - Power mode F-6
69 Relay - Start C-14
D Relay - Start/stop D-6
D Relay - Stop lamp E-6
27 Relay - Supplemental steering H-12
D Relay - Temperature E-6
D Relay - Transmission speed F-6
D Relay - Travel alarm F-4
D Relay - Travel cutoff F-5
D Resistor - Backup main pump E-9
D Resistor - Backup swing pump E-9
C Resistor - Engine speed dial B-2
21 Resistor - Heater fan - B-8
22 Sender - A/C temp. regulator A-10
63 Sender - Coolant temperature D-12
46 Sender - Fuel level F-13
52 Sender - Hyd oil high temp & switch E-13
66 Sensor - Engine speed D-14
58 Solenoid - Air conditioner clutch D-13
38 Solenoid - Aux Hyd G-14
4 Solenoid - Blade rear lockout H-9
35 Solenoid - Creeper speed F-14
60 Solenoid - Engine start/stop D-12
71 Solenoid - Ether start C-13
44 Solenoid - Hammer E-12
59 Solenoid - Heavy lift D-13
32 Solenoid - Implement activation G-14
1 Solenoid - Lh. front stabilizer lockout G-1
37 Solenoid - Main pump pry G-13
40 Solenoid - Parking brake F-13
2 Solenoid - Rh. front stabilizer lockout G-1
34 Solenoid - Swing brake F-14
36 Solenoid - Swing pump pry G-13
41 Solenoid - Transmission speed F-12
33 Solenoid - Travel activation G-14
67 Starter C-13
C Switch - AEC B-10
45 Switch - AEC implement travel D-14
43 Switch - AEC swing F-14
C Switch - Air conditioner B-10
57 Switch - Air conditioner press D-13
70 Switch - Air filter clog C-14
B Switch - Aux hyd (ccw rotation) D-3
C Switch - Aux hyd (cw rotation) C-5
C Switch - Backup B-10
C Switch - Beacon B-4
17 Switch - Brake light H-5
B Switch - Brake light cutoff E-3
65 Switch - Coolant temp ether start C-12
64 Switch - Coolant temperature D-12
C Switch - Creeper speed C-6
24 Switch - Disconnect H-12
61 Switch - Engine oil press D-12
19 Switch - Forward/reverse travel alarm H-5
C Switch - Front flood lamp C-4
Component Location
Machine
Location
Component
Schematic
Location
C Switch - Hammer B-7
C Switch - Hazard B-4
C Switch - Head lamp C-4
C Switch - Heater fan B-9
C Switch - Heavy lift B-l0
A Switch - Horn G-2
A Switch - Horn/turn/high beam G-3
54 Switch - Hyd oil filter clog E-14
53 Switch - Hyd oil low temperature E-13
C Switch - Key (start) C-6
C Switch Lh. front stabilizer lockout B-8
C switch - Lh. rear stabilizer lockout B-8
18 Switch - Low brake press G-5
42 Switch - Low trans clutch press F-13
A Switch - Lower windshield E-2
C Switch - Lower wiper B-6
15 Switch - Overload warning device A-5
C Switch - Overload warning device B-7
C Switch - Parking brake B-5
C Switch - Pilot control lock B-4
C Switch - Power mode C-6
16 Switch - Primary steering flow G-4
C Switch - Rear flood lamp C-4
D Switch - Refueling pump F-5
14 Switch - Reverse steering prox. B-5
C Switch - Rh. front stabilizer lockout B-8
C Switch - Rh. rear stabilizer lockout B-8
C Switch - Start aid C-9
B Switch - Starting/pilot press enable D-4
A Switch - Swing brake G-2
C Switch - Swing brake C-5
C Switch - Trans speed C-6
C Switch - Travel alarm cancel C-4
C Switch - Travel pedal lock B-6
A Switch - Travel pedal H-2
A Switch - Upper windshield E-2
C Switch - Upper wiper B-6
3 Swivel G-8
Component Location
Connector Location
Connector
Number
(from the
schematic)
Schematic
Location
(from the
schematic)
Machine
Location
(black callouts
on illustration
C001 D-2 1
C002 C-l1 2
C003 D-11 2
C004 D-8 2
C005 E-11 2
C006 G-11 2
For Harness To Harness Connectors ¹
¹ Connectors that join a harness to a component are
generally located at or near the component. See the
Component Location chart.
Related Electrical Service Manuals
Form Number
SENR3685
SENR6265
Starting Motor (8C-4774)
Consist No. 8C-4773 SENR3559
Consist No. 3E-1944 SENR3581
Title
Alternator (9W-3043)
Electronic Control Systems
Resistor, Sender and Solenoid Specifications
Part No. Component Description Resistance (Ohms)¹
Resistor - Blower Motor Speed 124-0329 Overall - 6.0; Tap - 1.5 or 4.5
Resistor - Backup 122-2373 47
Sender - Engine Coolant Temp 8U-1 516
60°C (140°F) - 134
90°C (194°F) - 51.2
100°C (212°F) - 38.5
Sender - Fuel Level 112-71 78 Empty -70.6; Full -0.4
Sender - Hydraulic Oil Temp 116-4710
60°C (140°F) - 134
90°C (194°F) - 51.2
100°C (21 2°F) -38.5
Solenoid - A/C Clutch 3E-1909 14.4 ± 0.6
Solenoid - Pump PRV 122-2379 27²
Solenoid - Engine Start/Stop 8C-3663
Start (Latch) Coil - 1.55 ± 0.15
Stop (Unlatch) Coil - 10.3 ± 1.03
Solenoid - Valve 8U-6424 19
¹ At room temperature.
² At operating temperature.
Off Machine Switch Specification
Part No. Function Actuate Deactuate Contact Position
5W-9934 Air Filter Vacuum 187.5 mm Hg (7.4 in Hg) NA Normally Open
5W-9972 Low Brake Oil Press 10000 kPa (1450 psi) NA Normally Open
6T-1546 Engine Oil Press
93.0 ± 20.8 kPa
(13.5 ± 3.0 psi)
68.9 ± 20.8 kPa
(10.0 ± 3.0 psi)
1-3 Normally Closed
1-2 Normally Open
8U-2158
Brake Light Press
AEC Swing 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
NA Not Available
COMPONENT LOCATIONS
In the chart above, the creeper speed relay information should be removed.
In location E-7 on the schematic, the creeper speed relay is replaced by a jumper wire
installed from contact 30 to contact 87a of the creeper speed relay socket. This
change allows creeper speed to be activated in transmission speeds one and two.
Electrical Schematic Change
A
3
29
5
6
4
9
57
47
46
14
67
48
16
B
C
D
69
1
2
17
18
19
20
21
22
23
24
25
26
27
28
25
30
31
32
37
35
33
34
36
38
7
68
39
40
41
42
43
44
45
71
70
50
49
54
51
52
53
66
55
56
1
2
59
62
72
58
61
11
60
63
12
67
10
64
8
15
13
Harness Connectors And Component Locations
1
2
A
3
62
42
41
8
31
30
52
53
49
47
71
48
B
C
64
63
50
51
25
4
69
68
67
28
27
26
67
57
56
55
22
21
60
D
58
61
72
59
40
45
44
24
23
43
35
34
33
32
39
38
37
36
54
46
66
70
29
5
6
9
16
1
2
17
18
19
20
7
D20105
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.
BK/YL(1)
PU(7)
GY/BK(1)
GY(7)
BK/PU(1)
GN(8)
BK/GN(10)
BK(12)
BU/WH(1)
BK/WH(5)
BK-14
RADIO
119-2006 5W-8937
SPEAKER
5W-8937
SPEAKER
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
LOWER WINDSHIELD
122-2370
UPPER WINDSHIELD
122-2369
TO CAB
YL(2)
5W-9391
ANTENNA
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/PU(1)
BK/GN(10)
GN(B)
BK-14
YL(2)
BK/RD(1)
BK/GN/RD(8)
GN/BK(2)
GN(2)
BK/GN/RD(1)
BK/GN/RD(8)
RD/YL(8)
GN(10)
BK/GN/RD(9)
GN/BR(2)
BK/RD(1)
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
5W-9347
OVERLOAD WARNING
DEVICE SWITCH
5W-9347
LOWER
WIPER SW
5W-9744
UPPER
WIPER SW
5W-9744
TRAVEL PEDAL
LOCK SWITCH
8U-6357
PARKING
BRAKE SW
8U-6353
SWING BRAKE
SWITCH
8U-6353
TRANS SPEED
SWITCH
125-4081
CREEPER SPEED
SWITCH
8U-3560
POWER
MODE SW
125-4080
PILOT CONTROL
LOCK SW
5W-7307
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)
BR/BK(3)
BK/WH(1)
BK/GN/RD(6)
BK/GN(3)
BK/GN(2)
GN/BU(5)
BK/GN(6)
BK/GN/RD(2)
BK/GN/RD(5)
YL(10)
RD/YL(30)
BU/YL(2)
BK
BK
BK
BK
BK/GN(3)
BK/GN(11)
BK/WH(1)
OR(2)
RD/YL(32)
RD/YL(31)
BK
PU(1)
BU(3)
BR/BK(3)
BK(11)
GN/BR(2)
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)
BR/BK(3)
BU(3)
PU(1)
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)
MAIN-POWER
120-5970
CREEPER
SPEED
117-4861
STOP LAMP
117-4861
HORN
5W-5883
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(2)
BK/GN(3)
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)
BU(6)
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)
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)
BR/BK(3)
BU(3)
PU(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)
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
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)
BU(6)
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)
BR/BK(3)
BU(3)
PU(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)
BR(4)
BR/BK(4) BU(3)
PU(1)
BK/RD(1)
BK
BK
RD(13)
RD(17)
RD(16)
RD(7)
BK
RD(19)
BU/YL(4)
RD(18)
RD(6)
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(2)
BK/GN(4)
PU(2)
BK/GN(5)
RD(6)
BR(1)
BK/GN(5)
RD(6)
BR(1)
PU(2)
RD-8(1)RD-8(2)
RD-8(1)
RD-8(3)
RD-6(4)
WH(3)
BK(8)
BK/GN/RD(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(6)
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-14
BK-14BK
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(11)
GN(12)
BR(3)
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(11)
GN(12)
BR(3)
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 V
GN/BU (5)
BK
GN/BR
BR
BU/YL (3)
BKBU (13)
HORN SW
5W-9376
SWING
BRAKE SW
8U-6109
TRAVEL
PEDAL SW
119-3405
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/YL(33)
RD(25)
RD/YL(33)
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
BK
STICK 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)
RD/YL(33)
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
FUEL
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/YL(33)
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)
BU(6)
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
GN/BU(6)
RD(25)
BU
RD-4
BU
MOTOR
118-9168
PU(3)
RD/YL(33)
RD/YL(33)
RD(8)
BU(6)
PU(3)
BU(6)
BK
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
122-2379
MAIN PUMP PRV
SOLENOID
122-2379
TO FRAME
PU(9)
PU(9)
SHIELD
BR
WH
WH
BR
SHIELD
TO FRAME
BK
BK
BK
BK
GN/BR(2)
BK/GN(3)
BK/GN/RD(3)
BK/YL/WH(1)
GN/BR(2)
BK/GN(3)
BK/GN/RD(3)
BK/YL/WH(1)
IMPLEMENT
ACTIVATION
SOLENOID
8U-6424
TRAVEL
ACTIVATION
SOLENOID
8U-6424
SWING
BRAKE
SOLENOID
8U-6424
CREEPER
SPEED
SOLENOID
8U-6424
TO FRAME
PU(2)
GN/BU(1)
BR/WH(3)
BK/GN(5)
BK/WH(1)
YL
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(2)
BK/GN(3)
BK/GN/RD(3)
BK/YL/WH(1)
AEC SWING
SWITCH
8U-2158
HEAVY LIFT
SOLENOID
8U-6424
RD(24)
BK(15)
HAMMER
SOLENOID
8U-6424
BK
WH(1)
BK
BK
BK
BK
BK BK
BK
HYD OIL
FILTER
CLOG SW
116-8514
PU(11)
PU(11)
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
6C-5859
BK(1)
RD (7)
BK
BK
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
BK
START
BK-8
GN-8
BK
BK
BK-8
GN-8
BU(14)
GN/BU(6)
(6)
> >
RD(25)
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)
RD-12
RD-12
GN(4)
BK
GN(4)
YL(16)
YL(13)
YL(15)
YL(16)
YL(15)
YL(13)
RD-12
BK-12
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-12
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
L25
L28
L29
L30
L31
L32
L26
L27
L18
L82
L20
L21
L25
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
AEC IMPLEMENT
TRAVEL SWITCH
117-0651
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
122-2373
RESISTOR
BK/YL/WH(1)
WH(14)
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)
BR/BK(3)
L
L
L A
A
C
C
A
W
C
C
C
C
G
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
D
D
D
G
G
G
G
G
G
G
D
A
F
E
C
A
C
C
W
D
W
W
X
X
P
A
R
R
T
W
A
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
J
J
BR
BU
J
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
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
FUEL LEVEL
SENDER
112-7178
PU(8)
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
AUX HYD
(CW ROTATION)
SWITCH
AUX HYD
(CCW ROTATION)
SWITCH
122-1903
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)
PU(5)
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)
PU(12)
L86
BK/GN(3)
GN/BR(2)
PU(12)
PU(12)
L87
GN/BR(6)
BK/GN(14)
PU(12)
BK
OR(5)
BK
AEC AUX-HYD
BRAKE
AEC
AUX-HYD
117-4861
L86
PU(12)
TRAVEL
ALARM
3T-1815
BK
BK
< 1 <
< 2 <
PRIMARY
STEERING
FLOW SW
9X-0008
2
6
3
910
2.5A
ANTENNA
ANTENNA
SPEAKER
GROUND
+BATT.
SPEAKER
SPEAKER
SPEAKER
MOTOR
H
G
53
31B
53A
31
T
COOLANT TEMP
SWITCH
8C-3569
ENGINE
START/STOP
SOLENOID
8C-3663
T
MOTOR
MOTOR
T
POS NEG
NC
NO
C
5
7
9
10
1
5
7
2
6
1
8
3
7
2
10 9
4
1
8
+BATTERY
ALARM
PRESS.SW
SHUTDN.SW
GROUND
RELAY
122-2371
BK
BK
BK
BK
BK
POS NEG
BK
BK
ETHER START
SOLENOID
122-2377
+
D+
D-
W
MOTOR
3
7
2
10 9
4
1
8
5
7
9
10
1
5
7
9
10
1
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
GROUND
+BATTERY
TRAVEL SOL
PARK SW
PARK LIGHT
1
3
2
6
4
5
TRAVEL
CUTOFF
RELAY
8U-7440
2
6
4
5
1
3
7
8
NC
NC
NC
OUT (LAMP)
+ BATTERY
GROUND
49a
C2
49
C
31
8U-9152
56B
56A
58
31
HEAD
LAMP AS.
2U-4800
POSITION
LAMP
5W-2033
MOTOR
MTR BAT
G S
STARTER
8C-4774
< 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
7,5A
7,5A
7,5A
15A
7,5A
6
5
4
3
2
1
7,5A
7,5A
8
7
FUSE BLOCK 111-2480
D RED
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
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
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
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
85
86
30
87
87a
<< 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
<< 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
<< 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
<
< 09
<
< 10
<< 01
<< 02
<< 03
<< 04
<
< 05
<
< 06
<< 07
<< 08
<< 12
<
< 11
<
< 07
<
< 12
<< 10
<< 11
<< 06
<
< 01
<
< 02
<
< 05
<< 08
<< 09
<< 04
<
< 03
CONTROL-ENG/PUMP 116-4404
40 DATA LINK (TXD)
42
DATA LINK (RXD)
12
MODE III INDICATOR (-)
07
SERVICE TOOL (-)
16
ENG SPEED DIAL SIG SHIELD
19
TEMPERATURE
22 ENG SPEED DIAL REF SIG
32
TRAVEL LOCK SOLENOID (+)
33
MODE III INDICATOR (+)
35
TRAVEL LOCK
37
BRAKE PEDAL
38
POWER MODE II
39 POWER MODE I
44
ENG SPEED DIAL REF SIG
45
ENG SPEED DIAL SIG
51
HEAVY LIFT
02
+ BATTERY - SWITCHED
01
+ BATTERY - SWITCHED
-- NC
--
NC
--
NC
10
GOV POS SIGNAL REF (-)
34
REQUESTED GOV POS
46
ACTUAL GOVERNOR POS.
-- NC
08
TRAVEL LOCK SOLENOID (-)
36
TRAVEL PEDAL
--
NC
03
GROUND
04
GROUND
50 AUTO ENG CONTROL (AEC)
30
HEAVY LIFT SOLENOID (+)
09
53
ENGINE SPEED
18
ENGINE SPEED
17
ENG SPEED SENSOR SIG. SHIELD
29 SWING PRV SOLENOID (+)
06
SWING PRV SOLENOID (-)
28
MAIN PRV SOLENOID (+)
05
MAIN PRV SOLENOID (-)
>
<
>+
<-
PLUG
120-5967
24V
12V
GND
5 7
1
9
10
BRAKE LIGHT
CUTOFF SW
STARTING/
PILOT PRESS
ENABLE SWITCH
117-3187
<
< 01
<
< 02
<< 03
1 5
9
10
1 5
9
10
5
7
2
9
10
6
1
8
15
50A
30
KEY 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
CONTROL-ENGINE 119-5856
16
SOLENOID
17
SOLENOID
01
POS INDICATOR OUT
13
POS INDICATOR IN
19 POS INDICATOR GND
20
NC
03
NC
07
NC
10
NC
11
NC
04 UNUSED
12
UNUSED
22
UNUSED
14
NC
23
NC
21
UNUSED
06 GOV POS SIG REF (-)
05
REQUESTED GOV POS
24
ACTUAL GOV POS
09
+ BATTERY
15
OUTPUT STAGE
18
SWITCHING INPUT
02 GND
08
GND
01
SOLENOID
02
SOLENOID
01
POS IND OUT
02POS IND IN
03
POS IND GND
RD
BR
BK
>
01
02
03
04
WH(13)
PU(10)
YL
BR
WH
SHIELD
SHIELD
>
<
< 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
PDT
2
24V
3 GND
7
TXD
6
RXD
RD
BR
GN
BU
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
6V-2455
< 1 <
< 2 <
STER SW
MOT RELAY
BATTERY
LAMP
ALTERNATOR
GROUND
SUPPLEMENTAL
STEERING CONTROL
122-2378
< 1 <
< 1 <
< 1 <
BU
BK
RD
ENGINE
OIL SW
6T-1546
BK
BK
RELAY
3E-0075
T
< 1 <
< 2 <
BK
BK
RELAY
3E-0075
T
< 1 <
< 2 <
A/C TEMP
REGULATOR
122-2374
MOTOR
BK-12
BR-12
AIR
CONDITIONER
FAN
122-2375
GN-14
GN-14
A/C CLUTCH
SOLENOID
3E-1909
BK
BK/YL
A/C PRESS
SWITCH
122-2376
+ V
SIGNAL
GROUND
< 1 <
< 2 <
< 3 <
BR
BK
BU
REVERSE STEER
PROX. SW
121-0797
<
< 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
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
DE
MONITOR
PANEL
122-6774
1
3
2
< A <
<
B
<
<
C
<
WH
GN
BR
ENGINE
SPEED DIAL
124-3424
5
3
2
1
DIODE
TEMP
123-3998
1
2
3
4
DIODE STOP LAMP
& CREEPER SPEED
123-5635
5
A/C
RELAY
123-6527
86
85
30
87
87b
<< 02
<< 06
<
< 01
<
< 05
<
< 03
<< 04
70A
BREAKER CKT.
123-8838
60A
BREAKER CKT.
124-0016
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
GN/BR(6)
BK/GN(14)
124-8427
9
10
GY
GY
BK
FLASHER/
WARNING
LIGHT
< 2 <
< 1 <
< 1 <
< 2 <
GOV ACTR 112-7593
< 2 <
< 1 <
< A <
< B <
< C <
< D <
< 2 <
< 1<
< 2<
< 5<
< 3<
< 6<
< 4<
< 1 <
< 3 <
< 2 <
< 1 <
< 2 <
< 1 <
< 2 <
< 1 <
> 1 >
> 2 >
> 3 >
> 4 >
TRAVEL ALARM
G
H
H
G
F
E
D
C
B
A
DASHED LINES INDICATE ATTACHMENT COMPONENTS,
WIRES AND CONNECTORS.
WIRES THAT HAVE BATTERY VOLTAGE
WHEN THE KEY SWITCH IS OFF.
WIRES THAT HAVE BATTERY VOLTAGE
WHEN THE KEY SWITCH IS ON.
STARTING CIRCUIT.
TEMPERATURE MODE CIRCUIT.
MONITOR PANEL CIRCUIT.
PANEL LAMP CIRCUIT.
WIPER/WASHER CIRCUIT.
HEATER AND AIR CONDITIONER CIRCUIT.
GROUND CIRCUIT.
ENGINE SHUTDOWN 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.
ENGINE AND PUMP CONTROL CIRCUIT.
A
B
C
D
E
F
14 13 12 11 10 9 8 7 6 5 4 3 2 1
14 13 12 11 10 9 8 7 6 5 4 3 2 1
ON
OFF
OFF
ON
BU(3)
PU(1)
CLOSES
WHEN BRAKES
ARE APPLIED
SHOWN WITH
CONSOLE IN
UP POSITION
OFF
ON
HEAVY LIFT SOLENOID (-)
NOTE A
PU(3)
RD(8)
BU(6)
SUPPLEMENTAL STEERING
NOTE A
L47
MODE I
SHOWN WITH
OSCILLATING AXLE
LEVER IN BRAKE
OFF POSITIONS
THIS SCHEMATIC IS FOR THE M318 EXCAVATOR, (111-1840 CHG 01).
COMPONENTS ARE SHOWN INSTALLED ON A FULLY
OPERABLE MACHINE WITH THE KEY AND ENGINE OFF.
UNLESS OTHERWISE SPECIFIED ALL WIRE IS 16 GAGE.
NOTE A: SWITCH SHOWN WITH NO HYDRAULIC DEMAND.
NOTE: ALL CONSOLE SWITCHES ARE SHOWN WITH THE FRONT
OF THE SWITCH DEPRESSED, AS SEEN FROM THE OPERATORS SEAT.
SWITCH MUST
BE CLOSED
FOR TRAVEL
1
2
C002
C003
C004
C006
C005
< E <
SHIELD
BK-16
TO CAB
BK-16
BK-14
BK-10 SHIELD
1 PARKING LIGHTS RHS
2 PARKING LIGHTS LHS
3 INSTRUMENT LIGHTING
4 LOW BEAM RHS
5 LOW BEAM LHS
6 HIGH BEAM RHS
7 HIGH BEAM LHS
8 CONTROL LIGHTS; TURN SIGNAL
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
1 BACKUP
2 POWER MODE SELECTION
3 INDIVIDUAL STABILIZERS
4 WORKING LIGHTS
5 HAMMER BLOW FREQUENCY ADJUSTMENT
6 ELECTRONICS
7 ROTATING BEACON
8 AIR SUSPENDED DRIVER SEAT
7.5
7.5
7.5
15
7.5
7.5
7.5
7.5
1 ELECTRICAL FUEL LIFT PUMP
2 WARNING LIGHT; START/STOP SOLENOID
3 STARTER KEY SWITCH; MAIN POWER-RELAY; LIGHT
4 CONVERTER 24 TO 12V (RADIO)
5 START/STOP RELAY
6 COMPRESSOR AIR HORN
7 FAN; ETHER START
8 CIGARETTE LIGHTER; PLUG; DOME LIGHT
25
7.5
15
7.5
7.5
15
15
7.5
FUSE BLOCK "A" BLACK
FUSE BLOCK "C" GREEN
1 STOP LIGHT
2 AIR CONDITION
3 HORN; BUZZER (OVERLOAD); 1/3 PRESSURE DROP
4 BLUE LIGHT (REVERST STEERING); TRAVEL ALARM
5 START/PILOT PRESS ENABLE SW; SWING GEAR;
MISCELLANEOUS FUNCTION; RELAY TRAVEL
CUT OFF; PARK BRAKE TRANSMISSION SPEED;
CREEPER SPEED
6 SUPPLEMENTAL STEERING
7 UPPER WINDSHIELD WIPER AND PUMP
8 LOWER WINDSHIELD WIPER AND PUMP
7.5
15
7.5
7.5
15
7.5
7.5
7.5
FUSE BLOCK "D" REDFUSE BLOCK "B" YELLOW
A
B
C
D
E
F
G
H
1
2
3
4
5
6
7
8
A
B
C
D
E
F
G
H
1
2
3
4
5
6
7
8
122-1903
<
<
<
<
<
<
<
<
BK
RD
C001
MM*2
70
50
16
10
6
4
2.5
1.5
1
AWG
00
0
4
6
8
10
12
14
16
COLOR
BLACK
BROWN
BLUE
GREEN
GRAY
ORANGE
PINK
PURPLE
RED
WHITE
YELLOW
ABBREV
BK
BR
BU
GN
GY
OR
PK
PU
RD
WH
YL
PART-NO.
120-5712
117-0949
120-6924
121-0874
120-6922
120-6923
120-6921
122-2359
120-6920
125-6566
199-8301
120-6919
121-0875
121-0876
121-0877
121-0879
122-2360
122-2362
122-2363
122-2364
121-2973
121-2972
122-2365
122-2366
122-2382
8X-9618
123-6475
IDENT
A
B
C
D
E
F
G
H
J
K
L
M
N
P
R
T
U
V
W
X
Y
Z
AA
BB
CC
DD
EE
LOC
D-11
D-11
F-12
D-12
C-12
C-12
C-12
D-3
D-4
C-7
H-15
D-2
H-14
H-13
H-13
H-14
C-16
D-15
H-15
H-14
G-10
G-2
G-2
H-10
C-15
H-2
C-7
BLADE, SPADE, RING
OR SCREW TERMINAL
CIRCUIT CONNECTED
CIRCUIT NOT CONNECTED
ELECTRICAL CONNECTION
TO VEHICLE STRUCTURE
INTERNAL ELECTRICAL
CONNECTION TO SURFACE
OF COMPONENT
CONNECTOR
ATCH WIRE, CABLE.
COMPONENT
CIRCUIT GROUPING
DESIGNATION
< <
+
L#
CIRCUIT IDENTIFICATION LEGEND
SERVICE CONNECTOR
A
B
C
D
E
F
G
H
1
2
3
4
5
6
7
8
A
B
C
D
E
F
G
H
1
2
3
4
5
6
7
8
