RENR4033
June 2000
M312 and M315 Excavators
Electrical System Schematic
M312:
6TL951-UP
M315:
7ML1647-UP
©2000 Caterpillar
All Rights Reserved
Printed in U.S.A.
A
B
C
D
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
A
B
C
D
24
25
26
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
24
25
26
MACHINE HARNESS CONNECTOR AND COMPONENT LOCATIONS
Component Location
Component
Schematic
Location
Machine
Location
Component
Schematic
Location
Machine
Location
AEC - Aux. Hyd. F - 8 D Solenoid - Left Rear Stabilizer Lockout G - 10 6
Alternator C - 13 21 Solenoid- Main Pump PRV G - 14 11
Alternator Fuse C - 15 16 Solenoid - OSC Axle Lock F - 14 17
Battery 12v (2) H - 13 24 Solenoid - Parking Brake F - 14 17
Cigar Lighter F - 2 A Solenoid - Right Front Stabilizer Lockout G - 1 1
Converter 24v - 12v D - 3 A Solenoid - Right Rear Stabilizer Lockout H - 10 6
Diode - A/C E - 13 D Solenoid - Swing Brake G - 15 11
Diode - AEC - Aux. Hyd. F - 8 D Solenoid - Swing Pump PRV G - 14 11
Diode - Brake D - 6 D Solenoid - Transmission Speed F - 13 17
Diode - Harness AS A - 9 D Solenoid - Travel Activation G - 15 11
Diode - Stop Lamp E - 8 D Secondary Steering Control H - 14
4
Diode - Temp E - 6 D Switch - AEC B - 10
C
Engine Pump Control C - 11, B - 11 A Switch - AEC Boom Cyl. Pressure E - 15
20
Engine Speed Dial C - 2 C Switch - AEC Implement Travel F - 15
20
Flasher F - 7 C Switch - AEC Stick Cyl. Pressure E - 15
20
Fuse Block (A Black) F - 10 D Switch - AEC Swing Pressure E - 15
11
Fuse Block (B Yellow) F - 9 D Switch - Air Filter Clog B - 15
15
Fuse Block (C Green) E - 10 D Switch - Air Horn G - 2
A
Fuse Block (D Red) E - 9 D Switch - Aux. Hyd. (ccw rotation) D - 3
B
Hour Meter E - 5 D Switch - Aux. Hyd. (cw rotation) C - 5
C
Main Fuse G - 8 19 Switch - A/C B - 11
C
Monitor Panel C - 2 C Switch - A/C Pressure E - 14
3
Motor - Air Conditioner Fan E - 14 3 Switch - Backup C - 11
C
Motor - Governor Actuator B - 13 5 Switch - Beacon B - 5 C
Motor - Heater Fan B - 9 10 Switch - Brake Light H - 5 8
Motor - Lower Washer G - 13 11 Switch - Coolant Temperature D - 13 21
Motor - Lower Wiper E - 1 7 Switch - Coolant Temp Cold Start C - 13 19
Motor- Refueling Pump H - 13 2 Switch - Creeper Speed C - 6 C
Motor - Starter C - 14 25 Switch - Disconnect H - 12 24
Motor - Secondary Steering H - 12 4 Switch - Engine Oil Pressure D - 13 26
Motor - Upper Washer G - 13 11 Switch - Forward/Reverse Travel Alarm (2) H - 6, G - 6 8
Motor - Upper Wiper E - 2 A Switch - Front Flood Lamp C - 5 C
Radio F - 2 A Switch - Hammer B - 8 C
Regulator - A/C Temperature B - 10
C
Switch - Hazard B - 4 C
Relay - A/C Clutch D - 13 3 Switch - Head Lamp D - 5 C
Relay - A/C Fan E - 13 D Switch - Heater Fan B - 10 C
Relay - Air Horn E - 7 21 Switch - Heavy Lift C - 10 C
Relay - Brake F - 6 D Switch - Horn/Turn/High Beam G - 3 A
Relay - Brake/Travel Cutoff D - 5 D Switch - Hyd. Oil Filter Clog E - 14 13
Relay - Glow Plug System D - 7 D Switch - Hyd. Oil Low Temperature E - 14 14
Relay - Interval Wiper G - 6 D Switch - Hyd. Oil High Temperature E - 14 14
Relay - Main Power F - 7 D Switch - Key (Start) C - 7 C
Relay - Pilot Press Enable F - 7 D Switch - Left Front Stabilizer Lockout C - 9 C
Relay - Power Mode F - 6 D Switch - Left Rear Stabilizer Lockout C - 9 C
Relay - Start C - 15 19 Switch - Low Brake Pressure G - 5 8
Relay - Stop Lamp Cutoff E - 7 D Switch - Low Transmission Clutch Pressure F - 13 17
Relay - Secondary Steering G - 13 4 Switch - Lower Windshield E - 2 A
Relay - Secondary Steering H - 13 4 Switch - Lower Wiper C - 7 C
Relay - Swing Brake Timer G - 5 D Switch - One Touch Idle Down C - 6 C
Relay - Temperature E - 6 D Switch - OSC Axle Lock C - 5 C
Relay - Transmission Speed F - 6 D Switch - Overload Warning Device A - 5 C
Relay - Travel Alarm F - 5 D Switch - Overload Warning Device C - 8 23
Resistor - Backup Main Pump PRV E - 10 D Switch - Parking Brake B - 5 C
Resistor - Backup Swing Pump PRV E - 10 D Switch - Pilot Control Lock B - 5 C
Resistor - Coolant Temperature C - 13 5 Switch - Power Mode C - 6 C
Resistor - Glow Plug System C - 14 20 Switch - Primary Steering Flow G - 4 8
Resistor - Heater Fan B - 9 10 Switch - Rear Flood Lamp C - 5 C
Resistor - Start/Stop D - 13 5 Switch - Refueling Pump E - 5 D
Sender - Coolant Temperature D - 13 21 Switch - Reverse Steer Proximity B - 5 9
Sender - Fuel Level F - 14 12 Switch - Right Front Stabilizer Lockout B - 9 C
Sender - Hydraulic Oil High Temperature E - 14 14 Switch - Right Rear Stabilizer Lockout B - 9 C
Sensor - Engine Speed D - 15 18 Switch - Starting Pilot Pressure Enable D - 4 B
Solenoid - Aux. Hyd. (cw) G - 15 C Switch - Swing Brake E - 3 B
Solenoid - Aux. Hyd. (ccw) G - 15 C Switch - Swing Brake E - 7 D
Solenoid - A/C Clutch D - 14 22 Switch - Transmission Speed C - 6 C
Solenoid - Blade Front G - 1 1 Switch - Travel Alarm Cancel C - 5 C
Solenoid - Blade Rear H - 10 6 Switch - Travel Cutoff F - 5 D
Solenoid - Creeper Speed F - 15 11 Switch - Travel Lock B - 6 C
Solenoid - Engine Start/Stop D - 13 5 Switch - Travel Pedal H - 2 A
Solenoid - Engine Cold Start C - 14 20 Switch - Upper Washer B - 8 A
Solenoid - Hammer E - 13 20 Switch - Upper Windshield E - 2 A
Solenoid - Heavy Lift F - 15 20 Switch - Upper Wiper B - 7 A
Solenoid - Implement Activation G - 15 11 Travel Lock Magnet H - 2 A
Solenoid - Left Front Stabilizer Lockout G -1 1
Machine locations are repeated for components located close together.
A = Located Inside Of Cab
B = Located Inside Of RH Console
C = Located Inside Of LH Console
D = Located Around Relay Panel
Connector Location
Connector Number
Schematic
Location
Machine
Location
CONN 1 H - 14 2
CONN 2 D - 13 5
CONN 3 E - 13 3
CONN 4 G - 13 4
CONN 5 G - 12 4
CONN 6 G - 12 4
CONN 7 C - 12 26
CONN 8 C -11 26
CONN 9 D - 11 26
CONN 10 E - 11 26
CONN 11 F - 11 26
CONN 12 H - 10 6
CONN 13 G - 1 1
CONN 14 C - 10 C
CONN 15 D - 10, 9, 8 26
CONN 16 D - 2 A
CONN 17 D - 1 1
The connectors shown in this chart are for harness to harness connectors.
Connectors that join a harness to a component are generally located at or near the
component. See the Component Location Chart.
Part No. Resistance (Ohms)¹
3E-1906 Solenoid: A/C Clutch 17.6 ± 0.6
8U-6424 Solenoid:
Blade Front
Blade Rear
Hammer
Heavy Lift
Left Front Stabilizer Lockout
Left Rear Stabilizer Lockout
Parking Brake
Right Front Stabilizer Lockout
Right Rear Stabilizer Lockout
Transmission Speed
19
172-7029 Solenoid:
OSC Axle Lock
Creeper Speed
Swing Brake
Travel Activation
Implement Activation
33.8/17 Watt
112-7178 Sender: Fuel Level
Full = 0.4
Empty = 70.6
116-4710 Sender: Hydraulic Oil Temperature
38.5 @ 100 ºC (212 ºF)
51.2 @ 90 ºC (194 ºF)
134 @ 60 ºC (140 ºF)
119-3401 Sender: Coolant Temperature
38.5 ± 3 @ 100 ºC (212 ºF)
52.2 ± 4.7 @ 90 ºC (194 ºF)
34 ± 13.5 @ 60 ºC (140 ºF)
7W-1251 Resistor: Glow Plug System 0.83/40 Watt
110-6158 Resistor: Start/Stop 4/75 Watt
122-2373 Resistor: Heater Fan
Position 1 = 6
Position 2 = 1.5
124-0329 Resistor:
Backup Main Pump PRV
Backup Swing Pump PRV
Overall 6.0; Tap 1.5 or 4.5
140-2238 Resistor: Coolant Temperature 25/25 Watt
¹ At room temperature unless otherwise noted.
Resistor, Sender and Solenoid Specifications
Component Description
Part No. Function Actuate Deactuate Contact Position
4.0 grams MAX 1.5 grams MIN Normally
(0.14 oz) (0.05 oz) Open
10132 kPa Normally
(1470 psi) Open
94 ºC Normally
201 ºF Open
100 ºC Normally
212 ºF Open
11 ºC 17 ºC Normally
52 ºF 63 ºF Open
2600 kPa Normally
(377 psi) Open
507 kPa Normally
Open
Coolant Temperature
Hydraulic Oil Low Temperature
Hydraulic Oil High Temperature
Low Brake Pressure
3E-6429
5W-9972
116-4710
119-3399
119-3400
171-7570
--
Off Machine Switch Specification
Low Transmission Clutch Pressure
163-2084
Primary Flow
--
--
AEC Swing Pressure
Boom-Cyl Pressure
Stick-Cyl Pressure
(74 psi)
--
--
Related Electrical Service Manuals
Form Number
Alternator: 109-2362
SENR3685
Machine Electronic Control System RENR1199
Title
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.
Error Message Logged Symptom Possible Causes
AEC Switch Yes
Automatic engine control operation may be
disturbed.
Automatic engine control switch contacts are dirty.
Main pump solenoid circuit is open.
Main pump solenoid circuit is shorted to the frame, or the backup switch is on.
Low Battery Voltage No Reduced output current is possible. Battery Voltage is below 17 DCV.
Brake Switch Yes Travel pedal control or Travel Mode may be disturbed. Brake relay contacts are dirty.
Swing pump solenoid circuit may be open.
Swing pump solenoid circuit is shorted to frame or the backup switch is on
Low Engine Speed No Reduction of hydraulic power. Engine RPM is too low.
High Engine Speed Yes High engine lugging possible. Engine RPM is too high.
Engine Spd. Dial Sig Yes Engine speed goes to current maximum allowed RPM. Engine speed dial potentiometer has short circuit or open.
Heavy Lift Circuit Yes Heavy lift function is impossible. Heavy lift solenoid circuit open, not installed, or shorted.
Heavy Lift Switch Yes Heavy lift function is possibly disturbed. Heavy lift switch contacts are dirty.
Spd Chg w/o Press Yes Both pumps are out of regulation. AEC Pressure switch open when the engine is loaded.
The engine and pump electronic control was not calibrated correctly when
manufactured.
Mode SW Short 1&3 Yes Mode 1 is set. Mode 1 and 3 signal lines are simultaneously grounded.
Mode SW Short 2&3 Yes Mode 2 is set. Mode 2 and 3 signal lines are simultaneously grounded.
Mode SW Short Yes Mode 1 is set. Mode 1 and 2 signal lines are simultaneously grounded.
Mode SW Open Yes Mode 1 is set. Mode switch is open or shorted.
Travel Lock Circuit Yes Travel pedal magnet does not function. Travel Lock magnet is open or shorted.
Act Mot Pos Chgd Yes Wrong loads and speeds possible. Injection pump worn or actuator linkage has changed.
Actual feedback voltage of the governor actuator is too low. Caused by an open
or grounded circuit, low idle position is to low, or the Actuator linkage may be
loose.
Actual feedback voltage of the governor actuator is too high. Caused by the
circuit being shorted to B+ or open, high idle position is to high, or the
actuator linkage may be loose.
Difference between the engine and pump controllers output to the governor
actuator and the feedback signal from the governor actuator motor is too large.
There is a defect in the governor actuator motor or the wiring harness.
Defaults Loaded Yes Engine and pump controller is not adjusted. No error if the default values are loaded. Delete the error.
AEC pressure switch or wiring is defective.
Engine speed sensor or wiring is defective.
Pressure when the engine is stopped.
Travel Lock Switch Yes Control of the travel pedal magnet is possibly disturbed. Travel lock contacts are dirty.
Engine speed reduction or automatic speed shifting
does not function.
System Faults Detected by the Controller
No
Main Pump has minimal power.
Swing pump has minimal power.
Current Limiting is possible.
Low idle too low or Engine lug is too small.
High idle too high or Engine lug is too large.
Engine speed or engine lug is incorrect.
RPM Setting High
RPM Setting Diff
Press w/o Spd. Chg
No
No
Yes
No
No
No
Main PRV Circuit
Swing PRV Circuit
Replace Control
RPM Setting Low
BK/YL(1)
RADIO
165-5934
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
GY
BK
YL(14)
YL(14)
BK
BK/WH(5)
BK/WH(6)
BK
BK
BK
BU/WH(1)
GY
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
AEC SW
5W-9372
A/C SW
5W-9372
HAMMER
SWITCH
8U-7284
OVERLOAD WARNING
DEVICE SWITCH
5W-9372
LOWER
WIPER SW
5W-9744
UPPER
WIPER SW
180-2649
TRAVEL LOCK
SWITCH
8U-6357
PARKING
BRAKE SW
133-8327
OSC AXLE
LOCK SW
133-8327
CREEPER
SPEED SW
5W-9372
PILOT CONTROL
LOCK SW
5W-9372
BEACON SW
5W-9372
TRAVEL ALARM
CANCEL SW
8U-6357
REAR FLOOD
LAMP SW
5W-9372
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)
RD/YL(1)
BK(6)
RD/YL(6)
BK(1)
BK/WH(5)
BK/YL/WH(2)
BK
BK/YL(1)
BU/WH(1)
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)
PK(13)
GY(12)
GY(13)
BK/GN(2)
GY
BU/YL(2)
PU(2)
BK/WH(1)
BK/GN/RD(6)
BK/GN(3)
BK/GN(2)
PK(13)
BR(11)
BK/GN/RD(2)
BK/GN/RD(5)
YL(5)
RD/YL(30)
BK
BK
BKBK
BK/GN(3)
BK/GN(11)
BK/WH(1)
OR(2)
RD/YL(31)
BK
PU(1)
GN/BR(2)
GN(29)
BK
GY
GY
WH(6)
YL(18)
BK/WH(3)
GN(8)
BK
YL(18)
WH(6)
BK/GN(7)
BK(12)
GN(8)
BU(10)
GN(9)
BK
RD(3)
RD(2)
YL(9)
BK
GY
GY
BK
RD/YL(7) WH(1)
RD/YL(5)
BK
RD/YL(27)
BK(3)
GY
RD/YL(29)
RD/YL(28)
BK
GY
GY
BK
BK(5)
BK(4)
BK(3)
RD/YL(5)
BK(2)
RD/YL(7)
YL(1)
WH(1)
RD/YL(3)TO FRAME
GY
BK BK
BK
RD(21)
GY
GYBK
BK
YL(7)
YL (13)
YL(8)
YL(7)YL(13)
BU(11)
RD(20)
BK(10)
BK
BK
BK
YL(12)
BU(10)
GN(9)
BK
RD(21)
OR(9)
BR(7)
GN(21)
WH(17)
BU(19)
RD
(24)
WH(6)
BK/GN(7)
BK/WH(3)
PK(13)
BR(11)
BK/YL/WH(2)
GY(1)
BR/BK(2)
BR/WH(3)
RD/YL(3)
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)
BK/GN(10)
YL(2)
OR(1)
GN(29)
GN/BR(2)
GN(2)
RD/YL(8)
BK/GN/RD(1)
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)
BR(10)
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)
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)
RD(10)
BU(8)
WH(7)
RD(11)
GN(6)
BU(10)
BR(11)
PK(13)
BK/GN(7)
BK/WH(3)
BK/YL/WH(2)
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(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)
BK/GN(10)
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)
GN(29)
BK/GN(2)
RD(1)
BU(4)
GN(3)
BU/YL(5)
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)
OR(12)
BK/PU(1)
BK/PU(2)
BK/GN(10)
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)
OR(12)
RD/YL(7)
BK/PU(1)
BK/PU(2)
BK/GN(10)
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)
BK/GN(10)
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/RD(4)
WH(14)
YL(4)
OR(10)
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)
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/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
BK
RD(13)
RD(17)
RD(16)
RD(7)
BK
RD(16)
RD/YL(15)
RD/YL(14)
RD(1)
BU(4)
YL(10)
BU/YL(5)
BK(6)
WH(2)
BU(2)
RD(7)
RD(9)
BU (7)
GN(5)
WH(7)
BU(8)
BU(10)
GN(6)
RD(10)
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)
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
BU (10)
BU(19)
RD(11)
GN(6)
BU (8)
RD(10)
PU(9)
GN(21)
WH(17)
RD(21)
GN(9)
YL(12)
BR(7)
BR(2)
WH(10)
RD(10)
BR(7)
BU(8)
YL(12)
GN(9)
GN(6)
BU (9)
YL(5)
WH(17)
GN(21)
RD(21)
PU(10)
PK(3)
WH(13)
YL(3)
BR(5)
BU(13)
BK
BK
PU(9)
WH(10)
BR(2)
BK (13)
BK(13)
RD(22)
TURN SIGNAL
LAMP AS.
116-9626
FLOOD
LAMP AS.
120-6775
BK
GN/BR(4)
BR(1)
BU/YL(3)
BKBU(13)
AIR
HORN SW
5W-9376
TRAVEL
PEDAL SW
136-9421
REVERSE
STER LIGHT
164-8366
TO
PLATFORM
GN/BR(3)
GN/BU(2)
BK/YL/WH(2)
WH(3)
BK/GN(4)
GN/WH(2)
BU/YL(3)
BR(10)
BR(11)
PK(13)
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)
PK(13)
BK/YL/WH(2)
WH(3)
BR(11)
GN/WH(2)
BU/YL(3)
BR(10)
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)
WH(7)
PU(19)
WH(7)
GN/BR(4)
BR(10)
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)
BR(11)
PK(13)
BK/GN(7)
BK/WH(3)
BK/YL/WH(2)
BU(13)
RD(25)
GN(4)
GN/BR(4)
BR(10)
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)
BR/WH(1)
BU(5)
GN(5)
BR/BK(2)
BR/WH(2)
GN(2)
WH(6)
WH(5)
BK/YL/WH(2)
BK/WH(3)
BK/GN(7)
PK(13)
BR(11)
DK-BU
BK
BK(4)
BK(3)
BK(2)
BK(1)
BK
TO FRAME
RD(25)
YL
RD-4
YL
SEC STER
MOTOR
118-9168
PU(3)RD(8)
PU(3)
RD(8)
WH(15)
WH(15)
BK
BK
BK-4
TO FRAME
WASHER
UPPER
7T-8890
WASHER
LOWER
7T-8890
RD-00
RD-00
RD(24)
WH(16)
BR(6)
WH(12)
YL(17)
BK
BK
WH(20)
BR(6)
WH(16)
YL
(17)
WH
(12)
OR(4)
BK
PU(6)
BK
SWING PUMP PRV
SOLENOID
143-2363
MAIN PUMP PRV
SOLENOID
143-2363
BR(6)
WH(16)
WH(16)
BR(6)
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
172-7029
TRAVEL
ACTIVATION
SOLENOID
172-7029
SWING
BRAKE
SOLENOID
172-7029
CREEPER
SPEED
SOLENOID
172-7029
TO FRAME
PU(2)
GN/BU(1)
BR/WH(3)
BK/GN (5)
BK/WH(1)
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
171-7570
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)
HEAVY LIFT
SOLENOID
8U-6424
RD(24)
BK
HAMMER
SOLENOID
8U-6424
BK
WH(1)
BK
BK
BK
BK
HYD OIL
FILTER
CLOG SW
116-8514
BU(7)
RD(9)
BR/BK(1)
BR/BK(1)
BR/WH
(2)
GN
(2)
BR/WH(2)
AIR FILTER
CLOG SW
168-6625
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
BK
BU
(5)
GN
(5)
GN(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
ALTERNATOR
109-2362
RD-6(2)
START
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
L8
L8
L9
L9
L10
L10
L11
L11
L10
L4
L1
BK
BK
BK
L15
L14
L14
L15
L26
L21
L17
L16
L13
L13
L24
L46
L45
L13
L16
L17
L43
L44
L40
L46
L18
L19
L20
L21
L22
L19
L18
L37
L38
L39
L41
L40
L42
L42
L36
L33
L33
L24
L23
L22
L19
L23
L28
L29
L30
L31
L32
L26
L27
L18
L82
L20
L21
L31
L31
L30
L29
L27
L28
L34
L36
L37
L65
L66
L66
L67
L67
L65
L57
L55
L45
L86
L41
L40
L47
L53
L54
L57
L58
L59
L60
L61
L48
L49
L62
L63
L64
L64
L63
L62
L61
L54
L60
L59
L50
L49
L48
L46
L44
L50
L38
L39
L51
L50
L87
L43
L38
L39
L43
L47
L32
L51
L32
L34
L30
L36
L48
L29
L30
L36
L51
L46
L50
L49
L44
L46
L34
L28
L27
L34
L34
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
GN(21)
WH(17)
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)
PK(13)
BR(11)
BR(11)
PK(13)
WH(6)
WH(5)
BK/YL/WH(2)
BK/GN(7)
BK/WH(3)
OR(2)
HEATER FAN
173-7421
RESISTOR
122-2373
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)
L
L
L A
CONN 1
A
C
C
A
W
C
C
C
C
G
G
C
C
D
D
D
D
G
V
V
V
C
G
L
L
GG
C
C
L
L
D
D
D
U
U
D
D
D
N
D
D
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
G
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
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
E
B
B
B
B
B
B
B
B
B
B
CC
DD
YL(9)
YL(9)
GN(10)
SEC STER
AUX HYD
(CW ROTATION)
SOLENOID
8U-9137
AUX HYD
(CCW ROTATION)
SOLENOID
8U-9137
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-9372
LEFT REAR
STABILIZER
LOCKOUT SW
5W-9372
RIGHT REAR
STABILIZER
LOCKOUT SW
5W-9372
LEFT FRONT
STABILIZER
LOCKOUT SW
5W-9372
RIGHT FRONT
STABILIZER
LOCKOUT SW
5W-9372
(CCW ROTATION)
Y
Z
OR(3)
OR(3)
OR(3)
OR(3)
BR/RD
BR
BR
BR/RD
BK-14
BU(9)
BK/WH(4)
BK
BK
GN/WH(1)
BK/GN(9)
GN/BR(5)
BK
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(7)
GN(21)
WH(17)
YL(12)
BK
BK
YL(12)
BK
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(5)
YL(12)
PU(3)
L80
L79
L79
L79
L55
L69
L69
L69
L35
L35
DIODE
8U-8045
BACKUP SW
133-8327
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)
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 (47 )
BACKUP RESISTOR
SWING PUMP PRV
124-0329 (47 )
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
GY
GY
BK
F
F F
F
E
B
E
EG
TO CAB
L86
BK/GN(3)
GN/BR(2)
BK/GN(14)
GN/BR(6)
PU(9)
L87
GN/BR(6)
BK/GN(14)
PU(9)
BK
OR(5)
BK
AEC AUX-HYD
BRAKE
AEC
AUX-HYD
117-4861
L86
BK
GY
GY
BKBK-10
L4
L1
EE
K
G
A
FF
FF
L47
BK-10
K
BK
PU(2)
PU(2)
TO FRAME BK
RD(31)
GN(4)GN(4)
D
V
V
FAN
CLUTCH
L89
L89
L89
RD(31)
RD(31)
RD(31)
RD(31)
RD-12
RD-12
RD(31)
L89
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
SECONDARY STER
RELAY
117-4861
W
W
AEC BOOM-CYL
AEC STICK-CYL
AEC SWING
TRANS SPEED
SWITCH
5W-9372
YL(10)
BU/YL(5)
GN/BR(2)OR(12)
GN(3)
BU/YL(2)
YL(10)
BU/YL(5)
BK
E
B
BU/YL(5)
YL(10)
L80
L80
YL(10)
OR(9)
RD(33)
OR(9)
BK-12
DIODE
140-6617
HARNESS AS
DIODE
142-9472
BK
GN
BK
GN
BK
GN
D
GG
TRAVEL
CUTOFF
117-4861
GN(28)
WH(9)
OR(10)
PU(9)
WH(7)
RD(33)
BU(9)
RD(24)
GN(25)
PK(11)
PK(9)
PK(8)
GN(26)
GN(27)
GN(24)
PK(7)
PK(12)
PK(10)
BK
BK
GN(24)
PK(7)
PK(12)
BK
OSC AXLE
LOCK
SOLENOID
172-7029
PU(19)
C
C
C
C
PK(12)
PU(19)
PU(19)
BU(20)
BU(20)
PK(7)
BU(20)
GN(24)
PK(12)
GN(24)
PK(12)
PK(7)
GN(24)
BU(20)
GY(1)
UPPER
WASHER SW
2U-6635
BK
GY
GY/BK(1)
BU(21)
GY(15)
WH(20)
GY(14)
WH(20)
GY(1)
(CW ROTATION)
BR(11)
BU(21)
GY(15)
YL(18)
GY(7)
GN(10)
POWER
MODE SW
5W-9372
PU(9)
SWING BRAKE
SWITCH
113-2531
GN
YL
BK BK
BU(20)
BU(20)
PU(19)
PU(19)
PK(13)
BR(11)
BR(10)
BR(10)
BR(10)
GN/BU(1)
BU(20)
PK(7)
PK(7)
BU(20)
SWING
BRAKE
117-4861
BK
BK
BU(9)
GN(29)
GN(29)
GN/BU(1)
PK(12)
WH(5)
PK(12)
BU(9)
GN(28)
GN(16)
BK
BK
BK
GY(7)
GY(15)
BU(21)
WH(20)
YL(18)
L12
L12
L12
GY(7)
BU(21)
YL(18)
GY(15)
WH(20)
L12
RD(33)
L52
L52
RD(33)
L52
RD-10(10)
RD-10(10)
RD(33)
RD(33)RD(33)
OR(6)
OR(6)
OR(6)
RD-10(9)
RD-10(9)
A
D
RD-10(9)
RD-10(9)
RD(19)
RD(18)
RD(19)
RD(18)
ONE TOUCH
IDLE DOWN
113-2531
YL
GN
RD(36)
BK
BK
OR(6)
OR(7)
RD(2)
BU(19)
BR(7)
BU(19)
BU(19)
RD(30)
RD(30)
BK
RD(33)
RD(33)
OR(9)
RD(36)
RD(36)
YL(5)
BU(9)YL(5)
BU(9)
RD(33)
RD(22)
RD(11)
BU(19)
YL(5)
BU(9)
JJ
HH
BR/BK(2)
RD(18)
RD(19)
BU(17)
BK
BK
BK
RD(18)
GLOW PLUG
035-8059
GLOW PLUG SYSTEM
RESISTOR
7W-1251
TO FRAME
RD(19)
BK
RD-12(3) RD-10(9)
BK
GN(23) GN(22)
KK KK D
KK
KK
KK
KK
KK KK
D
D
D
BK
BK
WH
WH
J
J
START/STOP
RESISTOR
110-6158
B
A
A
A
F
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
MOTOR
MOTOR
T
POS NEG
+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
3
7
2
10 9
4
1
8
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)
A3
B3
B4
B5
B1
C1
HEATER FAN SW
111-3805
2
6
3
910
5
4
9
10
2
7
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
09
10
03
02
11
07
12
01
08
06
04
05
07
12
10
11
06
01
02
05
08
09
04
03
+
-
PLUG
120-5967
24V
12V
GND
STARTING/
PILOT PRESS
ENABLE SWITCH
117-3187
1 3 2 4
+ -
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
SCHIELD
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
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
1
2
3
4
DIODE
STOP LAMP
123-5635
5
A/C
RELAY
123-6527
86
85
30
87
87b
FUSE
ALTERNATOR
123-8838
70A
MAIN FUSE
124-0016
60A
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
FUEL LEVEL
SENDER
112-7178
A/C
RELAY
123-6527
86
85
30
87
87b
1
2
1
2
GN-14
GN-14
A/C CLUTCH
SOLENOID
3E-1906
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
SECONDARY
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
5 7
1
9
10
5 7
1
9
10
5 7
1
9
10
LOWER WINDSHIELD
137-7245
BK-14BK-14
5
7
2
9
10
6
1
8
5
7
2
9
10
6
1
8
T
1
2
A/C TEMP
REGULATOR
3E-5464
MAIN-POWER
157-0836
30
87
86
85
MOTOR
2
1
BR-12
BK-12
AIR
CONDITIONER
FAN
145-7724
1
2
GN
BU
A/C PRESS
SWITCH
114-5333
1
2
1
2
ARC
SUPPRESSOR
106-8704
85
86
30
87
87a
AIR HORN
5W-5883
85
86
30
87
+ V
SIGNAL
GROUND
1
2
3
BR
BK
BU
REVERSE STEER
PROX. SW
151-1953
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 148-0078
A BLACK
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 148-0079
B YELLOW
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 148-0080
C GREEN
F
E
D
C
B
A
H
G
7,5A
7,5A
15A
7,5A
7,5A
20A
7,5A
6
5
4
3
2
1
7,5A
7,5A
8
7
FUSE BLOCK 1480081
D RED
F
E
D
C
B
A
H
G
SW PRESS
163-2084
1
4
2
SW PRESS
163-2084
1
4
2
SW PRESS
163-2084
1
4
2
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
5
7
2
9
10
6
1
8
5 7
1
9
10
5 7
1
9
10
5 7
1
9
10
5 7
1
9
10
5 7
1
9
10
5 7
1
9
10
5 7
1
9
10
1 5
9
10
1 5
9
10
2
8
3
910
1
5
5 7
1
9
10
RD
BK
GY
BU
AUX HYD SW
113-2531
5 7
1
9
10
5 7
1
9
10
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
175-7204
1
3
2
A
B
C
RD
BR
BK
ENGINE
SPEED DIAL
141-6258
5 7
1
9
10
RD
BK
GY
BU
AUX HYD SW
113-2531
STOP LAMP CUTOFF/
OSCILLATING AXLE
BLOCKED SWITCH
174-8209
32 41
31
31b
15
53e
53c
SWING BRAKE
TIMER RELAY
155-4574
I
31
31b
15
53e
53c
INTERVAL
WIPER RELAY
155-4574
I
STOP LAMP
CUTOFF 60s
174-8208
31
15
30
87
87a
85
86
30
87
87a
GLOW PLUG SYSTEM
157-0836
85
86
30
87
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
04
05
21
38
27
01
40
03
06
07
08
23
30
32
13
34
02
33
24
25
26
14
22
36
37
35
31
39
29
28
20
19
10
09
18
17
16
15
12
11
15
19
17
50A
30
KEY SWITCH
117-9508
01
02
02
06
01
05
03
04
08
07
09
10
01
02
03
12
05
06
07
08
04
11
02
05
06
07
03
04
01
GOVERNOR
ACTUATOR
MOTOR
151-1032
MOTOR
+
-
CONTROL-ENG/PUMP:
M312 = 150-4462
M315 = 149-7606
40
TXD
42
RXD
12
RS-232-RETURN
37
ONE TOUCH IDLE DOWN
--
NC
19
MODE TEMP. (MODE 0)
22
GOVERNOR CONTR-KL.3
30
MAGNET TRAVEL SPEED +
31
MODE-3 LAMP +
50
SW-TRAVEL SPEED CONTR
48
BRAKE LIGHT
38
MODE 2
39
MODE 1
44
GOVERNOR CONTR-KL.1
45
GOVERNOR CONTR-KL.2
51
SWITCH HLC
02
+ 24 VOLT
01
+ 24 VOLT
35
NC
--
NC
41
GOV ACT MOTOR +
15
GOV POS FEEDBACK RTN
46
GOV POS FEEDBACK SIG
24
GOV POS FEEDBACK PWR
43
GOV ACT MOTOR -
36
SW-TRAVEL PEDAL (M.3)
--
NC
03
GROUND
04
GROUND
--
SW-PRESS SENSORS AEC
32
SOLENOID HLC +
--
NC
53
ENGINE SPEED SENSOR +
18
ENGINE SPEED SENSOR -
--
NC
29
SOLENOID SWING PUMP +
28
SOLENOID MAIN PUMP +
47
SWITCH-CONSOLE AEC
BK
BK
ENGINE SPEED
SENSOR
116-6680
1
2
MOTOR
MTR BAT
G S
STARTER
109-2361
ENGINE OIL
PRESS SW
7W-1238
03
04
05
02
06
01
COOLANT TEMP
SENDER
119-3401
T
ENGINE
START/STOP
SOLENOID
???-????
ENGINE
COLD START
SOLENOID
???-????
1
2
BK
BK
COOLANT TEMP.
RESISTOR
140-2238
1
2
BK
BKCOOLANT TEMP
COLD START SW
126-5983
T
1
2
1
2
COMPONENTS ARE SHOWN INSTALLED ON A FULLY
OPERABLE MACHINE WITH THE KEY AND ENGINE OFF.
UNLESS OTHERWISE SPECIFIED:
THIS SCHEMATIC IS FOR THE M312 / M315 EXCAVATOR (179-9028-01)
ALL WIRE IS 16 GAUGE
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 BACKUP 7,5
2 POWER MODE SELECTION; AEC; SWING BRAKE 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
IDENT PART-NO. LOC
179-9077 C-5
179-9056
C-5
174-9111
C-6
179-9044
C-6
179-9048
C-6
179-9042
B-6
179-9082
C-1
180-8137
E-7
B-6
140-1059
F-8
120-6919
C-1
129-3454
F-7
121-0876
E-7
121-0877
F-7
121-0879
F-7
122-2360
C-8
145-9202
D-7
179-9050
E-7
122-2364
E-7
121-2972
E-5
121-2973
E-1
AA
122-2365
E-1
BB
122-2366
E-5
CC
129-4673
C-8
DD
8X-9618
E-1
150-4464
EE
123-6475
C-7
FF
126-6801
F-7
GG
145-9203
C-7
179-9069
HH
128-1041
C-7
JJ
128-1042
C-7
KK
167-9039
C-7
E-6
1 ELECTRICAL FUEL LIFT PUMP 25
2 WARNING LIGHT 7,5
3 STARTER KEY SWITCH; MAIN POWER-RELAY; LIGHT 15
4 POTENTIAL TRANSFORMER 24V ==> 12V (RADIO) 7,5
5 START/STOP SOLENOID; COLD START SYSTEM 7,5
6 COMPRESSOR AIR HORN 15
7 HEATER FAN 15
8 CIGARETTE LIGHTER; PLUG; DOME LIGHT 7,5
FUSE "B" YELLOW
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 SECONDARY 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
OSC AXLE LOCK;
15 1234567891011121314
15 1234567891011121314
H
G
F
E
D
C
B
A
H
G
F
E
D
C
B
A
A
B
D
E
F
G
H
J
K
L
M
N
P
R
T
U
V
W
X
Y
Z
C
AWG MM*2
0 50
4 16
6 10
8 6
10 4
12 2.5
14 1.5
16 1
00 70
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.
TURN SIGNAL AND WIPER/WASHER CIRCUIT.
HEATER AND AIR CONDITIONER CIRCUIT.
GROUND CIRCUIT.
ENGINE PUMP CONTROL 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.
CONN 2
CONN 3
CONN 4
CONN 5
CONN 6
CONN 7
CONN 8
CONN 9
CONN 10
CONN 11
CONN 12
CONN 12
CONN 15
CONN 14
CONN 16
CONN 17
CONN 13
CONN 13
