M312/M315 ELECTRICAL SCHEMATIC USED IN SERVICE MANUAL SENR8940, 8920

©
2001 Caterpillar
All Rights Reserved
RENR1196-02
June 2001
M312 and M315 Excavators
Electrical System
M312:
6TL540-541
6TL635-950
M315:
7ML1061-1064
7ML1215-1646
Printed in U.S.A.
Connector Location
Connector Number
Schematic
Location
Machine
Location
CONN 1 I-14 25
CONN 2 E-13 55
CONN 3 H-13 26
CONN 4 D-12 72
CONN 5 C-12 61
CONN 6 C-11, D-11 61
CONN 7 D-11 61
CONN 8 F-11, E-11 61
CONN 9 G-11, F-11 61
CONN 10 I-10 4
CONN 11 H-10 4
CONN 12 E-10,9,8 61
CONN 13 D-10 C
CONN 14 F-5 D
CONN 15 E-4 B
CONN 16 D-2 3
CONN 17 H-1 2
CONN 18 H-1 2
CONN 19 E-1 11
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.
Resistor, Sender, and Solenoid Specifications
Part No. Part Type Component Description Resistance (Ohms)¹
3E-1906 Solenoid: A/C Clutch 17.6 ± 0.6
Blade Front,
Blade Rear
Hammer
Heavy Lift
8U-6424 Solenoid: Left Front Stabilizer Lockout 19
Left Rear Stabilizer Lockout
Parking Brake
Right Front Stabilizer Lockout
Right Rear Stabilizer Lockout
Transmission Speed
112-7178 Sender: Fuel Level Full = 0.4
Empty = 70.6
38.5 @ 100° C (212° F)
116-4710 Sender: Hydraulic Oil Temperature Switch 51.2 @ 90° C (194° F)
134 @ 60° C (140° F)
124-0329 Resistor: Backup Main Pump PRV Overall 6.0; Tap 1.5 or 4.5
Backup Swing Pump PRV
¹ At room temperature.
Related Electrical Service Manuals
Title Form Number
Alternator: 109-2362 SENR3685
Electronic Control System SENR8937
Component Location
Description
Schematic
Location
Machine
Location
Description
Schematic
Location
Machine
Location
AEC - Aux. Hyd. G-8 D Solenoid - Right Front Stabilizer Lockout H-1 2
Air Horn E-7 62 Solenoid - Right Rear Stabilizer Lockout I-10 4
Alternator D-13 62 Solenoid - Swing Brake G-15 34
Alternator Fuse D-15 71 Solenoid - Swing Pump PRV. G-14 36
Battery 12v (2) I-13 23 Solenoid - Transmission Speed G-13 41
Cigar Lighter F-2 A Solenoid - Travel Activation G-15 33
Converter 24v - 12v D-3 A Stop Lamp F-7 D
Diode - AEC - Aux. Hyd. F-8 D Supplimental Steering Control H, I-14 26
Diode - Brake E-6 D Switch - AEC B-10 C
Diode - Harness AS B-8 D Switch - AEC Boom Cyl. F-15 59
Diode - Stop Lamp F-8 D Switch - AEC Impl. Travel F-15 45
Diode - Temp E6 D Switch - AEC Stick Cyl. F-15 59
Engine Pump Control C-11, B-11 A Switch - AEC Swing E-15 43
Engine Speed Dial C-2 C Switch - Air Filter Clog C-14 70
Fuse Block (A Black) G-10 D Switch - Air Horn H-2 A
Fuse Block (B Yellow) G-9 D Switch - Aux. Hyd. (ccw rotation) E-3 B
Fuse Block (C Green) F-10 D Switch - Aux. Hyd. (cw rotation) C-5 C
Fuse Block (D Red) F-9 D Switch - A/C B-11 C
Hour Meter E-5 D Switch - A/C Refrigerent Pressure E1-4 57
Main Fuse G-8 68 Switch - Backup C-11 C
Monitor Panel C-2 C Switch - Beacon B-5 C
Motor - Air Conditioner Fan E-14 55 Switch - Brake Light H-5 17
Motor - Governor Actuator B-12, 13 72 Switch - Brake Light Cutoff E-3 B
Motor - Heater Fan B-8 20 Switch - Coolant Temp D-13 64
Motor - Lower Wiper F-1 7 Switch - Coolant Temp Cold Start C-13 65
Motor - Re-fueling Pump I-13 25 Switch - Creeper Speed C-6 C
Motor - Starter D-14 67 Switch - Disconnect I-12 24
Motor - Suppl. Steer I-12 28 Switch - Engine Oil Press D-13 61
Motor - Upper Washer H-12 32 Switch - Forward/Reverse Travel Alarm (Qty.2) H-6 19
Motor - Upper Wiper F-2 A Switch - Front Flood Lamp D-5 C
Motor - Washer Lower H-12 32 Switch - Hammer B-8 C
Pilot Press Enable F-7 D Switch - Hazard B-4 C
Radio G-2 A Switch - Head Lamp D-5 C
Relay - A/C Clutch E-13 56 Switch - Heater Fan B-10, 9 C
Relay - A/C Fan E-13 D Switch - Heavy Lift C1-0 C
Relay - Brake G-6 D Switch - Horn/Turn /High Beam H-3 A
Relay - Brake / Travel Cutoff E-5 D Switch - Hyd. Oil Filter Clog E-14 54
Relay - Flasher/Warning Light G-7 D Switch - Hyd. Oil Low Temp E-14 53
Relay - Main Power G-7 D Switch - Key (Start) C, D-7 C
Relay - Power Mode F-6 D Switch - Left Front Stabl. Lockout C-8 C
Relay - Start C-15 69 Switch - Left Rear Stabl. Lockout C-9 C
Relay - Start / Stop D-13 D Switch - Low Brake Press. H-5 18
Relay - Supplimentary Steering I-13 27 Switch - Low Trans. Clutch Press. F-13 42
Relay - Temp F-6 D Switch - Lower Windshield E-2 A
Relay - Trans Speed G-6 D Switch - Lower Wiper C-7 C
Relay - Travel Alarm G-6 D Switch - Overload Warning Device A-5 C
Resistor - Backup Main Pump PRV E-10 D Switch - Overload Warning Device C-8 15
Resistor - Backup Swing Pump PRV E-10 D Switch - Parking Brake B-5 C
Resistor - Heater Fan B-8 21 Switch - Pilot Control Lock B-5 C
Sender - A/C Temp Regulator B-10 22 Switch - Power Mode D-6 C
Sender - Coolant Temp D-13 63 Switch - Primary Steering Flow H-4 16
Sender - Fuel Level G-14 46 Switch - Rear Flood Lamp C-5 C
Sender - Hyd. Oil High Temp F-14 52 Switch - Refueling Pump F-5 D
Sensor - Engine Speed D-15 66 Switch - Reverse Steer Prox. B-5 14
Solenoid - Aux. Hyd. (ccw rotation) H-15 B Switch - Right Front Stabl. Lockout B-8 C
Solenoid - Aux. Hyd. (cw) H-14 C Switch - Right Rear Stabl. Lockout B-9 C
Solenoid - A/C Clutch E-14 58 Switch - Starting Pilot Press. Enable E-4 B
Solenoid - Blade Front H-1 2 Switch - Swing Brake H-2 C
Solenoid - Blade Rear I-10 4 Switch - Swing Brake C-5 A
Solenoid - Creeper Speed G-14 35 Switch - Trans Speed C-6 C
Solenoid - Engine Start / Stop D-13 60 Switch - Travel Alarm Cancel C-5 C
Solenoid - Hammer F-13 44 Switch - Travel Cutoff G-5 D
Solenoid - Heavy Lift G-14 59 Switch - Travel Lock B-6 C
Solenoid - Impl. Activation H-15 32 Switch - Travel Pedal H-2 A
Solenoid - Left Front Stabilizer Lockout H-1 1 Switch - Upper Windshield E-2 A
Solenoid - Left Rear Stabilizer Lockout H-10 4 Switch - Upper Wiper B-7 A
Solenoid - Main Pump PRV. H-14 37 Travel Lock Magnet I-2 A
Solenoid - Parking Brake G-14 40
A = Located in the cab.
B = Located in the lefthand console.
C = Located in the righthand console.
D = Located on or near relay panel.
Machine locations are repeated for components located close together.
Off Machine Switch Specification
Part No. Function Actuate Deactuate Contact Position
3E-6429 Primary Flow 4.0 grams 1.5 grams Normally
(0.14 oz) (0.05 oz) Open
5W-9972 Low Brake Pressure 10000 kPa -- Normally
(1450 psi) -- Open
8U-2158 Brake Light Pressure 500 kPa -- Normally
(72.5 psi) -- Open
9D-7032 Forward/Reverse Travel Alarm Pressure 517 ± 34.5 kPa 414 ± 34.5 kPa Normally
(75.0 ± 5.0 psi) (60.1 ± 5.0 psi) Open
114-5333 Refrigerant Pressure (AC) 275 to 1750 kpa¹ -- Normally ²
(40 to 255 psi) -- Open
116-4710 Hydraulic Oil High Temperature 94º C -- Normally
201º F -- Open
116-8514 Hydraulic Oil Filter Clog Pressure 250 kPa -- Normally
(36.3 psi) -- Open
117-0651 AEC Implement Travel Pressure 1500 kPa -- 1 to 2 Normally Closed
(218 psi) -- 1 to 3 Normally Open
118-5501 Overload Warning Device Pressure 16000 kPa -- Normally
(2320 psi) -- Open
119-3399 Coolant Temperature 100º C -- Normally
212º F -- Open
119-3400 Hydraulic Oil Low Temperature 11º C 17º C Normally
52º F 63º F Open
condition can be maintained down to 170 kpa (25 psi).
¹ A hysteresis band exists: with increasing pressure the closed condition can be maintained up to 2800 kpa (405 psi), with decreasing pressure the closed
² Contact position at the contacts of the harness connector.
System Faults Detected by the Controller
Error Message Logged Symptom Possible Causes
AEC Switch Yes Automatic engine control operation may be disturbed. Automatic engine control switch contacts are dirty.
Main PRV Circuit No Main Pump has minimal power. Main pump solenoid circuit is open.
Main pump solenoid circuit is shorted to the fram, 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 PRV Circut No Swing pump has minimal power. 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.
Replace Control Yes Current Limiting is possible. 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 swith 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.
RPM Setting Low No Low idle too low or Engine lug is too small. Actual feedback voltage of the governor actuator is too low. Caused by an open
or grounded circuit, low idle possition is to low, or the Actuator linkage may be
loose.
RPM Setting High No High idle too high or Engine lug is too large. Actual feedback voltage of the governor actuator is too high. Caused by the
circuit being shorted to B+ or open, high idle possition is to high, or the
actuator linkage may be loose.
RPM Setting Diff No Engine speed or engine lug is incorrect. 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.
Press w/o Spd. Chg No Engine speed reduction or automatic speed shifting AEC pressure switch or wiring is defective.
does not function.
Engine speed sensor or wiring is defective.
Presure when the engine is stopped.
Travel Lock Switch Yes Control of the travel pedal magnet is possibly disturbed. Travel lock contacts are dirty.
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.
47
48
49
4
29
25
46
54
52
53
50
51
32
33
36
34
35
37
38
39
43
D
23
24
26
27
28
30
31
55
56
57
3
14
20
21
22
A
B
16
17
18
19
5
6
7
C
1
2
9
71
70
66
67
68
69
40
41
42
44
45
59
60
61
72
62
63
64
67
58
11
12
13
10
15
8
9
49
52
53
71
29
70
66
46
54
32
33
34
35
36
37
38
39
43
24
61
45
59
60
72
31
40
41
42
64
63
62
58
3
1
2
5
6
7
16
17
18
19
20
21
22
55
56
57
67
26
27
28
67
68
69
4
25
47
48
50
51
8
23
D
44
30
A
C
B
HARNESS CONNECTOR AND COMPONENT LOCATIONS
1
1
2
2
White callouts are for components,
see the Component Location chart.
Black callouts are for connectors,
see the Connector Location chart.
D35440
d
COMPONENTS ARE SHOWN INSTALLED ON A FULLY
OPERABLE MACHINE WITH THE KEY AND ENGINE OFF.
AWG MM*2
0 50
4 16
6 10
8 6
10 4
12 2.5
14 1.5
16 1
00 70
ABBREV COLOR
BK BLACK
BR BROWN
BU BLUE
GN GREEN
GY GRAY
OR ORANGE
PK PINK
PU PURPLE
RD RED
WH WHITE
YL YELLOW
1 PARKING LIGHTS RHS 7,5
2 PARKING LIGHTS LHS 7,5
3 INSTRUMENT LIGHTING 7,5
4 LOW BEAM RHS 7,5
5 LOW BEAM LHS 7,5
6 HIGH BEAM RHS 7,5
7 HIGH BEAM LHS 7,5
8 CONTROL LIGHTS; TURN SIGNAL 7,5
FUSE "A" BLACK
1 BACKUP 7,5
2 POWER MODE SELECTION 7,5
3 INDIVIDUAL STABILIZERS 7,5
4 WORKING LIGHTS 15
5 HAMMER BLOW FREQUENCY ADJUST.; FLOW CONTROL 7,5
6 ELECTRONICS 7,5
7 ROTATING BEACON 15
8 AIR SUSPENDED DRIVER SEAT; PRIORITY 7,5
FUSE "C" GREEN
1 STOP LIGHT 7,5
2 AIR CONDITION 20
3 HORN; BUZZER (OVERLOAD); 1/3 PRESSURE DROP 7,5
4 BLUE LIGHT (REVERSE STEERING); TRAVEL ALARM 7,5
5 ARM REST SWITCH; SWING GEAR; MISCELLANEOUS- 15
6 SUPPLEMENTAL STEERING 7,5
7 WINDSHIELD WIPER UPPER AND PUMP 7,5
8 WINDSHIELD WIPER LOWER AND PUMP 7,5
FUSE "D" RED
FUNCTION; RELAY TRAVEL CUT OFF; PARK BRAKE;
TRANSMISSION SPEED; CREEPER SPEED; CAB-RISER
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
IDENT
PART-NO. LOC
A 151-3161 E-10
B 126-0928 E-10
D 151-3163 D-11
E 150-4463 D-11
F 150-9354 D-11
G 150-4465 D-11
H 139-0549 E-2
J 120-6920 E-4
K B-10
L 119-8301 I-15
M 120-6919 E-1
N 129-3454 I-13
P 121-0876 I-12
R 121-0877 I-12
T 121-0879 I-13
U 122-2360 D-15
V 145-9202 F-13
W 132-7212 I-13
X 122-2364 I-13
Y 121-2972 H-9
Z 121-2973 I-1
AA 122-2365 H-1
BB 122-2366 H-1
CC 129-4673 D-14
DD 8X-9618 H-2
150-4464
EE 123-6475 C-12
FF
GG 126-6801 I-12
140-9123
HH 128-1041 D-13
JJ 128-1042 D-14
KK 167-9039 D-13
C G-11
LL 145-9203 E-13
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
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)
BK/GN/RD(8)
GN/BR(2)
BK/RD (1)
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
AEC SW
5W-9372
A/C SW
5W-9347
HAMMER
SWITCH
8U-7284
OVERLOAD WARNING
DEVICE SWITCH
5W-9347
LOWER
WIPER SW
5W-9744
UPPER
WIPER SW
5W-9744
TRAVEL LOCK
SWITCH
8U-6357
PARKING
BRAKE SW
8U-6353
SWING BRAKE
SWITCH
8U-6353
CREEPER SPEED
SWITCH
5W-9347
PILOT CONTROL
LOCK SW
5W-9372
BEACON SW
5W-9347
TRAVEL ALARM
CANCEL SW
8U-6357
REAR FLOOD
LAMP SW
5W-9347
FRONT FLOOD
LAMP SW
5W-5867
HEAD
LAMP SW
5w-5867
BK (12)
GY (7)
BK/GN(10)
GN (8)
BK/PU(1)
BU/WH(1)
BK/WH(5)
BK/YL (1)
YL (2)
GY/BK(1)
TO FRAME
BK
GY (2)
BK (1)
RD/YL(6)
BK (6)
RD/YL(1)
BK/GN/RD(3)
RD (5)
BK/GN/RD(3)
BK/YL (1)
BK (6)
BU/WH (1)
BK (1)
BK/WH(5)
BK/YL/WH (2)
BK
RD/YL(1)
RD/YL(6)
GY
RD/YL(30)
RD/YL(17)
GY
GY
GY
GY
GY
BU/WH(1)
BK/YL (1)
BK
BK
BK
BK
BK
BK
BK
BK/GN/RD (7)
GN/BU(5)
BK/GN (6)
BK/GN (12)
BK/GN (2)
GY
BU/YL(1)
BU/YL(2)
PU (2)
BK/WH (1)
BK/GN/RD(6)
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(31)
BK
PU (1)
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)
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)
RD/YL(3)TO FRAME
GY
BK BK
BK
BK
RD (21)
BK
GY(1)
GYBK
OR(9)
YL (7)
YL (13)
YL (8)
YL (7)YL (13)
BU(11)
RD(20)
BK(10)
BK
BK
YL (12)
BU(10)
GN (9)
BK
RD (21)
OR(9)
BR(7)
RD(33)
BR(7)
GN(21)
WH(17)
BU(19)
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)
RD/YL(5)
BK (2)
RD/YL(7)
BK (3)
BK (4)
BK (5)
YL (1)
WH(1)
RD (2)
RD (3)
BU/YL (1)
BU/YL (2)
PU (2)
BK/WH (1)
BK/GN/RD (2)
BK/GN (2)
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
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)
RD(18)
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)
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)
RD(1)
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)
BU (4)
GN(3)
BU/YL(1)
BK (6)
WH (2)
BU (2)
RD-14(1)
GN/WH (2)
GN/BU(2)
GY (2)
RD-10(6)
RD-10(4)
RD-10(3)
RD-10(1)
RD-10(8)
RD-10(7)
RD/YL (2)
GN/WH (3)
GN/WH (1)
GN/WH (4)
GN/BU (3)
GN/BU(4)
GY (1)
GY (3)
GY (5)
GY (4)
GY (6)
YL (2)
RD/YL(16)
RD/YL(3)
RD (16)
RD (18)
OR (1)
RD (3)
BK (7)
RD (19)
BU-10(2)
RD (5)
RD/YL(1)
RD (10)
RD/YL(14)
RD/YL(7)
RD/YL(6)
RD/YL(5)
BU/YL (2)
BK/PU(1)
BK/PU(2)
GY/BK(1)
RD (4)
RD (8)
RD/YL (8)
RD/YL (15)
RD/YL (12)
RD/YL (13 )
RD/YL (9)
RD/YL (11)
RD-12
RD/YL (10)
YL (2)
RD/YL(3)
RD/YL(16)
RD (16)
OR(1)
RD (3)
BK (7)
BU-10(2)
RD (18)
RD (19)
RD/YL (2)
GN/WH(1)
GN/WH(3)
GN/WH(4)
GN/BU(3)
GN/BU(4)
GY (1)
GY (2)
GY (3)
GY (4)
GY (5)
GY (6)
RD (5)
RD/YL(14)
RD (10)
RD/YL(1)
RD/YL(5)
RD/YL(6)
BU/YL (2)
RD/YL(7)
BK/PU(1)
BK/PU(2)
GY/BK(1)
RD (4)
RD (8)
RD/YL(8)
RD/YL(9)
RD/YL(10)
RD/YL(11)
RD/YL(12)
RD/YL(13)
RD-12
RD/YL(15)
RD-12
GY(5)
GY(6)
RD/YL(13)
BU-10(2)
RD (10)
RD/YL(16)
RD/YL(14)
RD/YL(15)
RD (16)
RD (18)
RD (19)
GY (2)
RD/YL(3)
RD(4)
GY/BK(1)
BK/PU(1)
RD/YL(1)
BU/YL (2)
RD/YL(5)
RD/YL(6)
RD/YL(7)
RD/YL(8)
RD (5)
BK (7)
RD (3)
RD/YL(9)
YL (2)
GY(1)
GN/WH (1)
RD/YL(2)
OR(1)
RD/YL(11)
RD (8)
GY (4)
GN/WH (4)
GN/BU(4)
RD/YL(12)
BK/PU(2)
GN/WH (3)
GN/BU(3)
GY (3)
RD/YL(10)
TO BOX
BK/GN/RD (4)
WH (14)
YL(4)
GN (16)
OR (10)
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)
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 (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(16)
RD/YL(15)
RD/YL(14)
BU (4)
GN(3)
BU/YL(1)
BK (6)
WH(2)
BU (2)
RD (7)
BU (7)
GN(5)
BU (9)
YL (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/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 (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)
YL (5)
BU (9)
RD (11)
GN(6)
BU (8)
RD (10)
WH (7)
BR(7)
BU(19)
WH(17)
RD (21)
GN(9)
YL (12)
OR(9)
GN(21)
BU(19)
BK(13)
BR(7)
BU(8)
YL (12)
GN(9)
GN(6)
BU(9)
YL(5)
WH(17)
GN(21)
RD(21)
OR(9)
WH(10)
RD(10)
RD(22)
BR(2)
WH(13)
YL(3)
BR(5)
PU(10)
BU(13)
PU(9)
RD(24)
WH(10)
BR (2)
BK (13)
RD(11)
RD (22)
TURN SIGNAL
LAMP AS.
116-9626
FLOOD
LAMP AS.
120-6775
GN/BU(1)
BK/GN (6)
GN/BU(5)
BK
GN/BR(4)
BR (1)
BU/YL (3)
BKBU (13)
AIR
HORN SW
5W-9376
SWING
BRAKE SW
8U-6109
TRAVEL
PEDAL SW
136-9421
REVERSE
STER LIGHT
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)
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)
BK
RD (25)
BK
BK
TO FRAMEBR
BU
BR
BU
BR
DK-BU
GN/YL
BK
RIGHT REAR
STABILIZER
LOCKOUT SOL.
8U-6424
LEFT REAR
STABILIZER
LOCKOUT SOL.
8U-6424
BK (2)
BK (3)
BK (4)
BK (5)
BK
BK(1)
BK(2)
BK(3)
BK(4)
GN/YL
GN/YL
BR
GN/YL
DK-BU
BK
GN/YL
BR
RD(12)
RD (12)
BK/GN (8)
BU-10 (1)
TO FRAME
TO FRAME
BKSTICK TRAVEL
LAMP AS.
8U-4742
RD/YL(12)
BU/YL (3)
YL (1)
BK (1)
RD/YL(11)
GN/BR(3)
GN/BR(4)
GN/BU(4)
GN/WH (4)
GY (4)
WH (4)
RD/YL(12)
BU/YL (3)
YL (1)
BU (13)
GN/BR(3)
GN/BU(5)
BK/YL/WH(2)
WH (3)
BK/GN (6)
GN/WH (2)
BU/YL (3)
GN/BU(1)
BK/GN (4)
GN/BU (2)
BR (1)
GN/BR(4)
BK (8)
GN/BU(3)
GN/WH (3)
GY (3)
BK/GN (7)
BK/WH(3)
BK/PU (2)
BK/WH(2)
RD/YL (10)
RD (6)
BU (1)
RD (25)
BU-10(1)
BK/GN (8)
BK (2)
BK (3)
BK (4)
BK (5)
GY (5)
GY (6)
RD (12)
RD-6 (4)
BK (9)
WH (4)
BU-10(1)
BK/GN (8)
BK/GN (8)
BU-10(1)
BK
REFUELING
PUMP
5W-8633
RD-00 BK-00
BK-00
RD-6(4)
DISCONNECT
SWITCH
7N-0718
12V BATTERY
(QNTY 2)
3T-5760
RD (12)
GY (6)
GY (5)
WH (4)
BK (9)
BK/GN (8)
BU-10(1)
RD-6(4)
BK
BK(18)
BK(18)
WH(7)
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)
RD (25)
GN(4)
GN/BR (4)
GN/BU (1)
WH (3)
BK/GN (4)
GN/WH (2)
BU/YL (3)
GN/BU (2)
BR (1)
BK (8)
GN/BU (3)
GN/WH (3)
GY(3)
BK/PU (2)
BK/WH(2)
RD/YL(10)
RD (6)
BU (1)
GN/BR (3)
BK (2)
BK (3)
BK (4)
BK (5)
RD (8)
WH (1)
BU (7)
RD(9)
BR/BK(1)
GN (4)
RD(18)
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)
GN/BU (5)
BK/GN (6)
DK-BU
BK
BK(4)
BK(3)
BK(2)
BK(1)
BK
TO FRAME
YL
RD-4
YL
SUPPL STER
MOTOR
118-9168
PU (3)
RD(8)
WH(15)
BK
BK
BK-4
TO FRAME
WASHER
UPPER
8U-2598
WASHER
LOWER
8U-2598
RD-00
RD-00
WH(16)
BR(6)
WH(12)
YL(17)
BK
BK
WH (5)
PU (9)
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
PU (9)
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
151-2515
TRAVEL
ACTIVATION
SOLENOID
151-2515
SWING
BRAKE
SOLENOID
151-2515
CREEPER
SPEED
SOLENOID
151-2515
TO FRAME
PU (2)
GN/BU (1)
BR/WH (3)
BK/GN (5)
BK/WH (1)
YL (4)
YL (4)
BR/WH (3)
GN/BU(1)
PU (2)
PARKING
BRAKE
SOLENOID
8U-6424
TRANSMISSION
SPEED
SOLENOID
8U-6424
BK BK
BK
BK
BK
LOW TRANSMISSION
CLUTCH PRESS SW
171-7550
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
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)
BR/WH (1)
GN(4)
BR/WH(1)
BU (5)
RD(18)
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
RD-6(2)
START
GN(15)
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
OR(8)
YL (16)
YL (13)
YL (15)
YL (16)
YL (15)
YL(13)
RD-12BK-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
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
L28
L29
L30
L31
L32
L26
L27
L18
L82
L20
L21
L31
L31
L30
L29
L28
L27
L34
L36
L37
L65
L66
L66
L67
L67
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
L60L59
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
L46
L34
L28
L27
L34
L34
L28
L28
L59
L58
L53
L68
L55
L67
L55
L67
L60
L54
L70
L61
L70
L64
L63
L62
L70
L68
L63
L68
L68
L68
L71
L72
L73
L74
L73
L72
L64
L75
L75
AIR SUSPENDED
DRIVER SEAT
GY
BKTO UNDCRG
GY
TO FRAME
GY
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)
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)
OR(2)
HEATER FAN
122-2372
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
A
C
C
A
W
C
C
C
C
G
G
C
C
D
D
D
D
G
V
V
V
G
G
L
L
D
C
C
L
L
D
D
D
U
U
D
D
D
N
D
G
G
G
G
D
A
F
E
C
A
C
C
W D
W
W
X
X
P
R
R
T
W
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
H
H
H
H
H
H
H
H
H
J
J
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
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)
SUPPL STER
AUX HYD
(CW ROTATION)
SOLENOID
8U-9137
AUX HYD
(CCW ROTATION)
SOLENOID
8U-9137
FUEL LEVEL
SENDER
112-7178
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-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
113-2531
AUX HYD
(CCW ROTATION)
SWITCH
113-2531
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)
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)
BK
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)
BU(19)
YL(12)
PU(3)
BK/RD(2)
L80
L80
L80
L80
L80
L79
L79
L79
L80
L55
L69
L69
L69
L35
L35
PU(11)
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)
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
GY
GY
BK
F
F F
F
E
B
E
EG
PU(12)
PU(12)
TO CAB
L86
BK/GN(3)
GN/BR(2)
PU(12)
BK/GN(14)
GN/BR(6)
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)
RD
BK
BK
GY
GY
BU
GY
BK
BK-10
L4
L1
EE
PK(3)
G
RD(19)
GN(23)
RD(19)
RD(19)
GLOW PLUG
035-8059
GLOW PLUG SYSTEM
RESISTOR
7W-1251
RD-10(9)RD-12(3)
RD-10(9)
GY
BK
OR(6)
GN(10)
OR(6)
OR(6)
OR(7)
L47
RD-10(10)
RD-10(10)
OR(6)
RD-10(9)
OR(6)
START/STOP
RESISTOR
110-6158
A
RD-10(9)
A
D
RD-10(9)
RD-10(9)
DKK KK
BK-10
K
GG
GG
A
GG
GG
PU (2)
PU(2)
BK
GN (4)
RD(31)
GN(4)
TO FRAME
BK
DV
V
BK FAN
CLUTCH
L56
L56
RD(31)
RD(31)
L56
L56
L56
L56
L56
RD(31)
L56
RD(31)
RD(31)
GN(2)
BK
WH(15)
WH(15)
W
SUPPL STER
RELAY
117-4861
BK
BK
BK
RD(8)
WH(15)
PU(3)
BK
BK
GN(14)
WH(15)
RD(32)
RD(8)
W
W
PU(12)
PU(12)
BK
PU(5)
BK
BK
BK
HHJJ
DIODE
140-6617
BK-12
HARNESS AS
DIODE
142-9472
TRANS SPEED
SWITCH
5W-9372
BK
GN
BK
GN
BK
GN
LL
LL
TRAVEL
CUTOFF
117-4861
WH(2)
WH(9)
OR(10)
RD(33)
RD(33)
BK BK
AEC SWING
SWITCH
8U-2158
AEC STICK-CYL.
SWITCH
8U-2158
AEC BOOM-CYL.
SWITCH
8U-2158
PU(9)
PU(13)
PU(11)
PU(5)
PU(13)
BK
BK
BK
RD (33)
RD(33)
BK
BK
RD (36)
RD (30)
RD (30)
RD(33)
RD(36)
BU(19)
ONE TOUCH
IDLE DOWN
122-1903
BU(19)
BK
RD(36)
RD(36)
BK
BK
GN
YL
BK
E
BK
YL(12)
RD (33) RD(33)
RD(33)
RD (33)
L81
RD(33)
L81
RD(1)
RD(9)
RD(1)
RD(9)
RD(7)
TO FRAME
BR/BK (2)
GN(5)
BK
RD(19)
BK
GN(22)
BU(17) RD(18)
BK
BK
BK
KK
KKKK
KK
KK
KK
KK
KK
D
D
D
G
KK
RD (24)
G
G
G
BK
B
RD(27)
RD(27)
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
NC
NO
C
+BATTERY
ALARM
PRESS.SW
SHUTDN.SW
GROUND
TRAVEL
ALARM
RELAY
122-2371
BK
BK
BK
BK
BK
1
2
3
4
POS NEG
MOTOR
3
7
2
10 9
4
1
8
1 5
9
10
3
7
2
10 9
4
1
8
1 5
9
10
1 5
9
10
1 5
9
10
1 5
9
10
1 5
9
10
1 5
9
10
MOTOR
OUT (LAMP)
+ BATTERY
GROUND
49a
C2
49
C
31
FLASHER
8U-9152
56B
56A
58
31
HEAD
LAMP AS.
2U-4800
POSITION
LAMP
5W-2033
6
8
2
3
5
1
7
HAZARD SW
5W-9351
10
RD/YL(2)
BK(7)
WH (3)
BK(8)
GN/BR (1)
BK/GN (9)
GY
GY
BK/GN (1)
GN/BR (5)
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
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
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
5 7
1
9
10
STARTING/
PILOT PRESS
ENABLE SWITCH
117-3187
03
01
02
1 5
9
10
+ -
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
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
A/C
RELAY
123-6527
86
85
30
87
87b
02
06
01
05
03
04
5
7
2
9
10
6
1
8
85
86
30
87
87a
5
3
2
1
DIODE
120-5969
5
3
2
1
DIODE
120-5969
AEC IMPLEMENT
TRAVEL SWITCH
117-0651
1
3
2
BRAKE LIGHT
CUTOFF SW
124-8427
BR
BU
POWER
MODE SW
5W-9372
5
7
9
10
1
15
19
17
50A
30
KEY SWITCH
117-9508
BK
BK
ENGINE SPEED
SENSOR
116-6680
1
2
ENGINE
START/STOP
SOLENOID
COOLANT TEMP
SENDER
119-3401
T
COOLANT TEMP
COLD START SW
126-5983
T
MOTOR
MTR BAT
G S
STARTER
109-2361
+
D+
D-
W
ALTERNATOR
109-2362
1 5
9
10
1
2
A/C
RELAY
123-6527
86
85
30
87
87b
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
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
LOWER WINDSHIELD
137-7245
BK-14BK-14
MAIN FUSE
124-0016
60A
FUSE
ALTERNATOR
123-8838
70A
ENGINE OIL
PRESS SW
7W-1238
5
7
9
10
1
5
7
2
9
10
6
1
8
5
7
2
9
10
6
1
8
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
148-7927
1
3
2
A
B
C
RD
BR
BK
ENGINE
SPEED DIAL
141-6258
+ V
SIGNAL
GROUND
1
2
3
BR
BK
BU
REVERSE STEER
PROX. SW
151-1953
MAIN-POWER
157-0836
30
87
86
85
AIR HORN
5W-5883
85
86
30
87
T
1
2
A/C TEMP
REGULATOR
3E-5464
GLOW PLUG SYSTEM
157-0836
85
86
30
87
5 7
1
9
10
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
1
2
ARC
SUPPRESSOR
106-8704
1
2
1
2
GN
BU
A/C PRESS
SWITCH
114-5333
MOTOR
2
1
BR-12
BK -12
AIR
CONDITIONER
FAN
145-7724
1
2
3
4
DIODE
STOP LAMP
123-5635
5
85
86
30
87
87a
02
05
06
07
03
04
01
GOVERNOR
ACTUATOR
MOTOR
151-1032
MOTOR
+
-
CONTROL-ENG/PUMP: *
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
--
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
35
SW-PRESS SENSORS AEC
32
SOLENOID HLC +
--
NC
53
ENGINE SPEED SENSOR +
18
ENGINE SPEED SENSOR -
--
NC
29
SOLENOID SWING PUMP +
--
NC
28
SOLENOID MAIN PUMP +
--
NC
M312 = 150-4462
M315 = 149-7606
47
SWITCH-CONSOLE AEC
09
10
01
02
03
04
05
06
07
08
12
11
01
02
04
05
21
38
27
01
40
03
06
07
08
23
30
32
13
34
02
33
11
25
26
14
24
36
37
35
31
39
29
28
20
19
10
09
18
17
16
15
12
22
11
05
06
07
08
10
09
14
12
16
18
64
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
15
51
03
63
61
28
32
19
25
ENGINE
COLD START
SOLENOID
1
2
BK
BK
COOLANT TEMP.
RESISTOR
140-2238
1
2
BK
BK
03
04
05
02
06
01
SHIELD
141-8947
SECONDARY
STEERING
CONTROL
CONN 1
CONN 3
CONN 2
CONN 4
CONN 5
CONN 6
CONN 7
CONN 8
CONN 9
CONN 10
CONN 11
CONN 13
CONN 12
CONN 14
CONN 15
CONN 16
CONN 17
CONN 18
THIS SCHEMATIC IS FOR THE M312/M315 EXCAVATOR (155-7849).
UNLESS OTHERWISE SPECIFIED ALL WIRE IS 16 GAUGE.
DESCRIPTIONSYMBOL
CONNECTOR
ELECTRICAL CONNECTION
INTERNAL ELECTRICAL
CONNECTION TO SURFACE
OF COMPONENT
BLADE, SPADE, RING,
OR SCREW TERMINAL
CIRCUIT CONNECTED
CIRCUIT NOT CONNECTED
ATCH WIRE, CABLE,
COMPONENT
L #
CIRCUIT GROUPING
DESIGNATION
TO MACHINE STRUCTURE
E83978
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 PANEL CIRCUIT.
PANEL LAMP CIRCUIT.
WASHER/WIPER CIRCUIT.
HEATER AND AIR CONDITIONER CIRCUIT.
GROUND CIRCUIT.
TURN SIGNAL CIRCUIT.
WIRES THAT HAVE BATTERY VOLTAGE
WHEN THE KEY SWITCH IS ON AND THE
LEFT HAND HYDRAULIC CONSOLE IS
LATCHTED IN THE DOWN POSITION.
ENGINE SHUTDOWN CONTROL CIRCUIT.
START AID CIRCUIT.
ENGINE/PUMP CONTROL CIRCUIT.
ALL DASHED LINES ARE ATTACHMENTS.
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
F
E
D
H
G
I
F
E
D
C
B
A
C
B
A
H
G
I