
©2000 Caterpillar
All Rights Reserved
Printed in U.S.A.
RENR1149-02
April 2000
315B Excavator
Electrical Schematic
5SW1-UP
Related Electrical Service Manuals
Title Form Number
Alternator: 109-2362 SENR3685
Engine/Pump Control RENR1998
Starting And Charging RENR1044
Resistor, Sender, and Solenoid Specifications
Part No. Component Resistance (Ohms)¹
3E-1906
solenoid - A/C Clutch
17.6 ± 0.6
3T-9493
Solenoid - Start Aid
1.5
4I - 5394
Sender - Hydraulic Oil Temp
6130 to 7500
7T-4003
Resistor - Fuel Pump
10.0 ± 0.5
102-8015
Resistor - Backup
41.0 ± 2.0
111-9916
Solenoid - Eng/Pump Control
11.7 ± 1.2
20824 - 25451 @ 0° C (32° F)
6134 - 7496 @ 25° C (77° F)
475 - 522 @ 100° C (212° F)
Slonoid - Level Finish
221 - 269 @ 125° C (257° F)
Trenching
14.4 ± 0.6
solenoids - Hydraulic Lock
Swing Brake
Travel Speed
¹ At room temperature.
121-1491
32.0 ± 3.2
112-4009 Sender - Coolant Temperature
121-1490
A
3
4
5
6
8
9
10
11
12
14
15
13
16
C
D
E
1
2
17
18
19
20
22
23
24
25
26
27
29
30
31
32
35
33
34
36
7
F
1
2
3
4
5
6
D
A
B
B
C
E
F
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
21
22
23
24
25
26
27
28
28
29
30
31
32
33
34
35
36
A AA
1
2
325-PK-14
200-BK-14
T
This indicates that the component does not have a wire connected to ground. It is
grounded by being fastened to the machine.
This indicates that the component has a wire connected to it that is connected to ground.
105-9344
T
Normally open switch that will close with an increase of a specific condition (temp-press-etc.).
The circle indicates that the component has screw terminals and a wire can be disconnected from it.
Pin
Socket
Fuse
Component
Part Number
Pin or Socket
Number
Receptacle
Plug
Wire Gauge
Wire, Cable, or Harness
Assembly Identification
Wire Color
Normally closed switch that will open with an increase of a specific condition.
No circle indicates that the wire cannot be disconnected from the component.
Single Wire
Connector
Circuit Number
Identification
Ground
Connection
Pressure
Symbol
Temperature
Symbol
Level
Symbol
Flow
Symbol
Circuit Breaker
Symbol
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.
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 Symbols
Electrical Schematic Symbols And Definitions
1
1
2
2
Typical representation of a Sure-Seal
connector. The plug and receptacle
contain both pins and sockets.
Typical representation of a Deutsch
connector. The plug contains all
sockets and the receptacle contains
all pins.
Real Time Error Codes
Code Description Of Problems
1301 Engine oil pressure too low
3102 Engine coolant temperature is too high
1303 Hydraulic oil temperature is too high
1304 Air filter is clogged
1305 Battery voltage is not normal
2201 Governor actuator feeback sensor circuit is open or shorted battery voltage
2202 Governor actuator feedback sensor is shorted to body ground
2301 Governor actuator feedback signal is not stabe
2302 Governor actuator feedback signal deviates
2303 Governor actuator does not move
2304 Calibration data error
3201 Monitor RAM is not normal
4101 Electric power supply to the controller is too much(43 volts)
4102 Over-current in proportional reducing valve
4103 Proportional reducing valve circuit is open
4105 Over-current in digital output (trenching solenoid)
4106 Over-current in digital output (fine control solenoid)
4107 Over-current in digital output (Travel speed change solenoid)
4108 Over-current in digital output (travel alarm)
410A Over-current in digital output (swing brake solenoid)
4201 Engine speed is not normal
4202 Engine coolant temperature sensor is shorted to body ground
4203 Hydraulic oil temperature sensor is shorted to body ground
4204 PWM sensor of pump delivery pressure is open in circuit
4207 PWM sensor of pump delivery pressure is open in circuit
420A Fuel sensor is shorted to ground
420B Fuel sensor is open or shorted to battery voltage
420C Electric power supply is too low (below 23 volts)
420D Electric power supply is too high (above 32 volts)
420E Engine speed dial is not one of the specified 10
4301 Data mismatch 1 between alternator and speed sensor (alternator is abnormal)
4302 Data mismatch 2 between alternator and speed sensor (speed sensor is abnormal)
4303 Engine stalls
A201 Monitor communication is not normal
A202 Monitor takes to much time to respond to controller's signal
A203 Communication is abnormal in controller
Component Location
Schematic Machine Schematic Machine
Location Location Location Location
A/C Unit H-6 1 Relay - Timer J-7 D
Actuator - Eng Gov B-7 2 Resistor - Air Heater J-7 D
Air Heater C-9 3 Resistor - Backup H-9 D
Alarm - Travel C-9 4 Resistor - Fuel Pump J-7 D
Alternator B-8 5 Sender - Coolant Temp B-8 21
Batteries F-9 6 Sender - Hyd Oil Temp B-7 13
Breaker - 1 H-9 D Sensor - A/C Photo F-2 E
Breaker - 2 H-9 D Sensor - Fuel Level A-2 22
Breaker - 3 H-9 D Sensor - Pump Discharge Press A-7 23
Breaker - Battery H-9 D Solenoid - A/C Compr Clutch B-8 5
Control - Wiper E-2 E Solenoid - Cold Advance B-9 24
Controller - Engine/Pump C-4 7 Solenoid - Eng/Pump Cont A-7 25
Converter - Voltage B-5 8 Solenoid - Fuel Pump B-9 24
Fuses J-4,5,6 B Solenoid - Hammer G-2 F
Ground - Cab A-6 A Solenoid - Hyd Lock G-2 F
Ground - Chassis B-3 9 Solenoid - Level Finish A-7 25
Ground - Platform D-5 F Solenoid - Start Aid E-9 26
Ground - Platform G-3 F Solenoid - Swing Brake A-2 27
Ground - Platform G-6 F Solenoid - Travel Speed A-7 25
Ground - Relay Panel H-8 D Solenoid - Trenching A-7 25
Ground Strap - Chassis to Platform G-6 10 Solenoid - Medium Press Valve B-7 28
Ground Strap - Disconnect to Switch to Chassis G-9 D Switch - Air Cleaner F-8 29
Ground Strap - Engine to Chassis A-8 11 Switch - Aux E-4 F
Heater H-6 1 Switch - Backup EPR Valve D-4 C
Horn - Forward C-2 12 Switch - Backup Gov D-5 C
Indicator - Hydraulic Oil Filter B-7 13 Switch - Boom Raise Press C-7 13
Joystick - Multiswitch (LH) H-2 B Switch - Coolant Level E-9 26
Joystick - Multiswitch (RH) F-3 C Switch - Coolant Temp B-9 24
Meter - Service F-2 E Switch - Coolant Temp C-9 24
Monitor F-2 E Switch - Disconnect G-9 D
Motor - Lower Wiper H-2 14 Switch - Eng Oil Level A-8 30
Motor - Starter A-8 15 Switch - Eng Oil Press B-9 31
Motor - Upper Wiper G-1 16 Switch - Hammer Press G-2 F
Motor - Washer F-9 D Switch - Heater/Start Aid E-4 C
Panel - Switch F-3 C Switch - Hyd Oil Lever B-7 13
Pickup - Engine Speed A-9 17 Switch - Implement Press C-7 32
Pump - Auto Lubrication E-9 18 Switch - Key Start E-3 C
Pump - Refueling B-2 19 Switch - Neutral Start Limit J-2 B
Relay - Air Heater J-8 D Switch - Overload Warning E-5 C
Relay - Aux Hydraulic J-8 D Switch - Overload Warning Pressure D-2 F
Relay - Boom Lamp J-9 D Switch - Radio E-4 C
Relay - Cab/Chassis lamp J-9 D Switch - Refrigerant Low Press B-9 26
Relay - Heater J-7 D Switch - Refueling A-2 33
Relay - Horn J-9 D Switch - Refueling Start (NO) B-2 34
Relay - Hydraulic Lock Solenoid J-9 D Switch - Refueling Stop (NC) B-2 34
Relay - Main H-7 D Switch - Rotating Beacon E-5 C
Relay - Neutral Start J-8 D Switch - Seat Heater E-4 C
Relay - Refueling 1 B-2 20 Switch - Throttle E-3 C
Relay - Refueling 2 B-2 20 Switch - Travel Pressure C-7 28
Relay - Start H-7 D Switch - Windshield E-2 A
A = Located inside of cab.
B = Located inside of right console.
C = Located inside of left console.
D = Located around relay panel.
E = Located around hydraulic oil tank.
F = Located around pilot manifold.
G = Located under platform.
Component Component
Machine locations are repeated for components located close together.
Wire Description
Wire Number Wire Color Description Wire Number Wire Color Description
Power Distribution Circuits Accessory Circuits (cont'd)
101 RD Bat (+) 508 PU Radio Speaker - Left
103 RD Aux Ckt 509 WH Radio Speaker - Left(Common)
105 RD Key Sw 511 BR Radio Speaker - Right
109 RD Alt Output (+) Term. 512 GN Radio Speaker - Right (Common)
110 RD Aux Ckt 513 OR A/C Compressor/Refrigerant Press SW
111 RD Aux Ckt 519 PK Thermostat To Refrigerant Press SW
112 PU Main Power Rly Output 524 BU Wiper Motor - Lower
113 OR Opr Mon B+ Switched 524 GN Wiper Motor - Upper
114 RD Warning Horn (Forward) 579 BR A/C Blower Motor No1
115 PK Aux Ckt 590 GY Wiper Switch To Intermittent Module
118 GY Aux Ckt A537 PK Seat Heater (Resistive Element In Cushion)
120 YL Aux Ckt A586 OR Wiper Switch To Wiper Control
124 RD A/C A588 GN Safety Sol Relay To Sol
129 BU Aux Ckt C537 GN A/C Photo Sensor (+) Sig
135 BU Aux Ckt C538 OR A/C Photo Sensor (-) Sig
139 OR Aux Ckt C576 BU Switch #1 To Medium Pressure Sol #1
140 BU Aux Ckt C577 GY Switch #1 To Medium Pressure Sol #2
149 PU Aux Ckt C578 YL Radio Switch To Radio
150 RD Bat (+) C583 OR +24 Volt Relay To A/C Control Module
151 GN Aux Ckt C592 WH Diode To Blade Relay
152 BU Aux Ckt
Lighting Circuits
154 RD Aux Ckt 607 PK Flood Lamp - Front
168 RD Aux Ckt 615 YL Cab Flood Lamp
172 RD Aux Ckt 616 BU Boom Flood Lamp
173 YL Aux Ckt 633 BU Attach Lighting Ckt
176 YL Aux Ckt 638 WH Rotary Beacon
177 RD Main Brkr
Control Circuits
178 GN Main Brkr 763 BU Torque Converter SW
179 BU Aux Ckt 786 GN Eng Speed Cont - Hi Press SW
180 GN Aux Ckt 788 YL Eng Speed (+)
185 YL Aux Ckt 779 WH Coupler Engage Sol
189 RD Aux Ckt 780 PU Coupler Disengage Sol
191 WH Aux Ckt 791 PK Eng Speed Cont - Lo Sol
196 BU Aux Ckt A755 PK Throttle SW #1
Ground Circuits
A756 BU Throttle SW #2
200 BK Main Chassis A757 GY Throttle SW #3
201 BK Operator Monitor Return A758 BR Throttle SW #4
210 BK Converter Output (24/12 Volt) A761 PU Electronic Pump Cont Throttle Ground
235 BK Electronic Pump Ctrl Gnd A762 PU Electronic Pump Cont Eng Speed Ground
Basic Machine Circuits
A768 BU Pump Cont Valve #1 (+)
304 WH Starter Relay No. 1 Output A769 GY Pump Cont Valve #2 (-)
306 GN Starter Relay Coil To Key Neut Start A770 PK Electronic Pump Control Bypass SW To Resistor
307 OR Key Switch Neut Start A771 PU Float SW
308 YL Main Power Relay Coil F771 OR Backup SW
310 PU Start Aid SW To Start Aid Sol F772 WH Backup SW
311 WH Start Aid Sol To Temp SW F773 OR Governor Accel
315 GN Start Aid Breaker To Start Aid Sol F774 WH Governor Decel
317 YL Start Aid Relay To Start Sol K779 PU Alternator D Terminal
320 RD Horn Relay Coil To SW 877 YL Glow Plug Magnetic SW To Glow Plug
321 BR Travel Alarm 954 GN Hammer SW A
322 GY Warning Horn (Forward) 955 BU Hammer Sol A
323 WH Fuel Pump Power K904 GN Pump Dicharge Signal
325 PK Fuel Pump Relay Cut-Out K905 RD Pump Discharge (+) B
327 PK Shutdown Solenoid K906 GN Swing Brake Sol Signal
365 YL Fuel Pump Relay To Switch K907 BU Swing Brake Sol (+) B
399 OR Cold Start Advance Motor K909 BU Backup SW (+) B
Monitoring Circuits
K911 PK E/P Controller - RS485 (+)
403 GN Alternator (R) Term. K912 GN E/P Controller - RS485 (-)
405 GY Opr Mon Oil Press (Low Setting) K997 BU (+) V Sensor
412 BU Opr Mon Cool Flow L908 OR Controller RS - 232C Tx
430 BU Opr Mon Air Filter L909 BU Controller RS - 232C Rx
487 OR Hyd Oil Flow SW L968 OR Electronic Pump Control Ps Valve (-)
491 PK Hyd Oil Temp Sensor L969 WH Electronic Pump Control Ps Valve (+)
492 GY Coolant Temp Sensor Signal L970 GY Electronic Pump Control To SW Common Return
495 GN Fuel Level Signal L971 GN Electronic Pump Control To Travel Pressure SW
496 WH Opr Mon Panel Hyd Oil Level L972 BU Low Idle SW
C468 BU Engine Oil Level L974 GN Electronic Pump Ctrl Boom Raise Press SW
H414 YL Warning Switch To Alarm L976 GN Excavator Fuel Pump SW
H415 BR Alarm To Warning Pressure Switch L977 YL Trenching Sol
Accessory Circuits
L978 GY Level Finish Sol
500 BR Wiper - Front (Park) R983 GN E/P Controller to Aux/Hyd Cotroller (RS485 +)
501 GN Wiper - Front (Low) R984 YL E/P Controller to Aux/Hyd Cotroller (RS485 -)
506 PU Washer - Front 8630 BU Lamp Relays
Connector Location¹
Connector Schematic Machine
Number Location Location
CONN 1 Service H-9 D
CONN 2 D-9 D
CONN 3 D-8 D
CONN 4 D-8 D
CONN 5 D-7 D
CONN 6 G-8 D
CONN 7 G-8 D
CONN 8 G-8 D
CONN 9 G-7 D
CONN 10 C-6 D
CONN 11 C-6 F
CONN 12 C-5 F
CONN 13 C-5 F
CONN 14 E-6 F
CONN 15 E-6 F
CONN 16 E-6 10
CONN 17 E-6 10
CONN 18 F-6 10
CONN 19 B-5 10
CONN 20 B-5 F
CONN 21 C-5 F
CONN 22 C-5 F
CONN 23 H-5 27
CONN 24 H-5 F
CONN 25 H-5 F
CONN 26 H-4 F
CONN 27 H-4 F
CONN 28 D-3 C
CONN 29 A-2 F
CONN 30 B-2 16
CONN 31 B-2 20
CONN 32 B-2 16
CONN 33 C-2 16
CONN 34 D-2 8
¹The connectors shown in this chart are harness to harness and special
use connectors. Connectors which join a harness to a component are
generally located at or near the component. See the component location
chart
Off Machine Switch Specification
Part No. Function Actuate Deactuate
Contact Position
8N-1693 Atch Coolant Temperature 37.8 ± 2.8° C 26.7° C MIN Normally
(100 ± 5° F) (80° F MIN) Closed
106-0179 Implement Pressure 1225.00 ± 98.00 kPa 882.00 kPa MIN Normally
Travel Pressure (177.67 ± 14.21 psi) (127.92 psi MIN) Open
106-0180 Boom Raise Pressure 2646.00 ± 196.00 kPa 2156.00 ± 196.00 kPa Normally
(383.77 ± 28.43 psi) (312.70 ± 28.43 psi) Open
106-0181 Hammer Pressure 490.00 ± 196.00 kPa 290.00 kPa MIN Normally
(71.07 ± 7.11 psi) (42.06 psi MIN) Open
107-0611 Engine Oil Presure 93.00 ± 21.00 kPa 70.00 ± 21.00 kPa Normally
(13.49 ± 3.05 psi) (10.15 ± 3.05 psi) Open
114-5333
AC Pressure
275 to 1750 kpa¹ Normally ²
(40 to 255 psi) Open
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
condition can be maintained down to 170 kpa (25 psi).
² Contact position at the contacts of the harness connector.
--
Machine Harness Connector And Component Locations

4
3
5
L974-GN-18
A769-GY-18
A768-BU-18
L978-GY-18
763-BU-18
L977-YL-18
487-OR-18
168-RD-14
491-PK-18
496-WH-18
A761-PU-18
F773-OR-18
F774-WH-18
AIR HEATER
035-8059
2
1
B
ENG SPEED
PICKUP
6V-2455
K997-BU-18
200-BK-18
B
B
PUMP DISCHARGE
PRESS. SENSOR
106-0178
SIGNAL
GROUND
+BATTERY
BK-18
BR-18
B
C
CHASSIS
B
GND
F/B
+B
ACCEL
C468-BU-18
403-GN-18
109-RD-6
200-BK-18
513-OR-18
B
K779-PU-18
YL-18
DECEL
6
BB
ENG GOV
ACTUATOR
139-3954
B
KEY
ALTERNATOR
109-2362
ENG OIL
LEVEL SW
111-4760
2
1
1
2
200-BK-18
172-RD-18
B
A761-PU-18
200-BK-18
F773-OR-18
200-BK-18
F774-WH-18
T
COOLANT TEMP
SENDER
112-4009
492-GY-18
405-GY-18
200-BK-14
STARTER
109-2361
W
B+
D
ALT
K997-BU-18
B
200-BK-18
B
2
1
ENG OIL
PRESS. SW
107-0611
AA
K904-GN-18
200-BK-18
A
ATCH A/C COMPR
CLUTCH SOL 3E-1906
K904-GN-18
200-BK-18
200-BK-18
B
B
B
B
2
1
ENG/PUMP CONT
SOL
111-9916
LEVEL FINISH
SOL
121-1490
A768-BU-18
TRENCHING
SOL
121-1490
TRAVEL SPEED
SOL
121-1491
A769-GY-18
L978-GY-18
200-BK-18
763-BU-18
200-BK-18
L977-YL-18
200-BK-18
B
L971-GN-18
A771-PU-18
L974-GN-18
200-BK-18
200-BK-18
A771-PU-18
B
B
SIGNAL
GROUND
BOOM RAISE
PRESS. SW
106-0180
B
B
2
1
+BATTERYA168-RD-14
B
HYD OIL
FILTER
INDICATOR
116-3660
200-BK-18
200-BK-18
B
L971-GN-18
IMPLEMENT
PRESS. SW
106-0179
491-PK-18
HYD OIL
TEMP SENDER
4I-5394
HYD OIL
LEVEL SW
111-4760
496-WH-18
C
T
B200-BK-14
487-OR-18
607-PK-14
322-GY-18
616-BU
200-BK-18
TRAVEL
PRESS. SW
106-0179
K906-GN-18
168-RD-14
495-GN-18
200-BK-18
K909-BU-18
A
A
7
8
1
6
5
4
3
2
200-BK-18
200-BK-14
200-BK-14
G
G
12
10
8
11
12
9
10
11
1
9
8
2
7
6
5
4
3
2
1
4
5
6
8
1
7
4
6
5
3
2
7
3
GA
G
235-BK
PLATFORM
A
590-GY-18
501-GN-18
A586-OR-18
308-YL-18
F771-OR-18
F772-WH-18
L969-WH-18
L968-OR-18
K907-BU-18
A755-PK-18
A756-BU-18
A757-GY-18
A758-BR-18
L972-BU-18
786-GN-18
791-RD-18
113-OR-18
105-RD
185-YL-18
H415-BR-18
A768-BU-18
A769-GY-18
A770-PK-18
F774-WH-18
F773-OR-18
K906-GN-18
307-OR-18
308-YL
F771-OR-18
F773-OR-18
F774-WH-18
F772-WH-18
K909-BU-18
K907-BU-18
A770-PK-18
L969-WH-18
L968-OR-18
200-BK-18
G
A769-GY-18
A768-BU-18
K906-GN-18
185-YL-18
200-BK-18
K909-BU-18
K907-BU-18
L969-WH-18
A770-PK-18
L968-OR-18
A769-GY-18
A768-BU-18
A769-GY-18
A768-BU-18
K906-GN-18
185-YL-18
185-YL-18
L968-OR-18
200-BK-18
F771-OR-18
F773-OR-18
L969-WH-18
F774-WH-18
11
8
F772-WH-18
5
A770-PK-18
K906-GN-18
2
12
10
K907-BU-18
9
185-YL-18
7
6
4
3
1
185-YL-18
3
2
1
BACKUP FPR VALVE SW
114-0421
G
G
BACKUP
GOV SW
110-7884
K909-BU-18
200-BK-18
K909-BU-18
ENG/PUMP CONT
139-3948
OPERATOR STATION
ATCH
HAMMER
PRESS. SW
106-0181
955-BU-18
954-GN-18
200-BK-18
A
A
954-GN-18
200-BK-18
200-BK-18
A588-GN-18
PLATFORM
200-BK-18
A588-GN-18
HYD LOCK SOL
121-1491
200-BK-18
2
1
5
4
3
2
1
OPERATOR STATION
OPERATOR STATION
GND
+BATTERY
L CHASSIS
L BOOM
WASH
W LOW
W INT
G
G
200-BK-18
A758-BR-18
A757-GY-18
A756-BU-18
113-OR-18
791-RD-18
105-RD
786-GN-18
307-OR-18
A586-OR-18
308-YL
501-GN-18
308-YL
SWITCH PANEL
111-4800
KEY SW
9G-7641
R
C
6
S
B
OFF
ON
ST
590-GY-18
A755-PK-18 PK
BU
GN
308-YL
BR
BK
200-BK-18
S4
S3
S2
S1
COM
G
THROTTLE
POS SW
106-0107
GY
PU
BR
RED
WHITE
ORANGE
YELLOW
PINK
ABBREV COLOR
BLACK
GRAY
PURPLE
BROWN
BK
PK
YL
OR
WH
RD
GN
BU
GREEN
BLUE
A588-GN-18
954-GN-18
955-BU-18
118-GY
118-GY
524-BU
118-GY
-
S
+
524-GN
200-BK
A
118-GY
524-BU
200-BK
C
LOWER
WIPER MOTOR
131-0398
B
A
1
152-BU
2
ATCH HAMMER SOL.
121-6303
K905-RD
129-BU-18
103-RD-18
118-GY
103-RD-18
185-YL-18
105-RD
173-YL-18
113-OR-18
118-GY
191-WH
C537-GN-18
C538-OR-18
955-BU-18
120-YL
524-BU
524-BU
954-GN-18
524-BU
118-GY
8630-BU-18
L15
L15
955-BU-18
152-BU
191-WH
955-BU-18
8630-BU-18
135-BU135-BU
C578-YL C578-YL
191-WH 191-WH-18
200-BK-18
135-BU
C578-YL
615-YL-14
H415-BR-18
ATCH- A/C UNIT
152-5085
NOTE E
3
6
1
4
5
2
C537-GN-18
579-BR-14
C538-OR-18
519-PK-18
200-BK-14
A
152-BU
200-BK-18
G
152-BU
615-YL-18
615-YL-18
200-BK-18
ATCH AUX SW
200-BK-18
G
C578-YL
135-BU
615-YL-18
615-YL-18
200-BK-18
ATCH RADIO
RADIO SW
145-9321
ATCH SEAT
HEATER SW
111-4783
200-BK-18
200-BK-18
615-YL-18
615-YL-18
A537-PK-18
G
A755-PK-18
A756-BU-18
A757-GY-18
A758-BR-18
308-YL-18
308-YL-18
307-OR-18
105-RD-14
590-GY-18
501-GN-18
A586-OR-18
200-BK-18
615-YL-18
786-GN-18
200-BK-18
200-BK-18
200-BK-18
791-PK-18
113-OR-18
A537-PK-18
C578-YL
H414-YL-18
200-BK-18
G
310-PU-18
615-YL-18
200-BK-18
152-BU
191-WH-18
8630-BU-18
310-PU-18
AIR HEATER/
ATCH START AID SW
111-4784
135-BU
L26
1
2 2
1
118-GY
200-BK-14
200-BK
615-YL
615-YL
200-BK
Y/G
Y/W
200-BK-18
118-GY
615-YL-18
A586-OR-18
501-GN-18
K912-GN-18
201-BK-18
103-RD-18
200-BK-18
K911-PK-18
590-GY-18
200-BK-18
403-GN-18
129-BU-18
C538-OR-18
C537-GN-18
C577-GY-18
ATCH ROTATING
BEACON SW
200-BK-18
615-YL-18
615-YL-18
8630-BU-18
152-BU
G
177-RD-10
154-RD-18
200-BK-14
200-BK-18
201-BK-18
200-BK-18
NOTE D: NOT NECESSARY FOR ELECTRIC OPENABLE
WINDSHIELD.
C577-GY-18
C576-BU-18
151-GN-18
A588-GN-18
C592-WH-18
C576-BU-18
C592-WH-18
DIODE
121-1022
K997-BU-18
NOTE C: USE WITH ELECTRIC OPENABLE WINDSHIELD.
200-BK-14
200-BK
506-PU
GND IN
WASH SW
+ 24 IN
MOT WASH
WIPER SW
OUTPUTS
INTER SW
WIND SW
4
6
9
3
500-BR-18
7
L4
D
CAB
D
D
+
GND
LIGHT
RS485-
+BATTERY
MAIN
RS485+
1
8
5
2
H
200-BK-18
320-OR-18
NEUTRAL START
LIMIT SW
111-4799
150-RD-18
151-GN-18
154-RD-18
A588-GN-18
A588-GN-18
H
H
200-BK
524-BU
500-BR-18
H
H
WIPER CONT
127-9838
D
H
HORN SW
D
WINDSHIELD SW
9G-2795
MONITOR
151-9385
PROVISION FOR
A/C PHOTO
SENSOR
113-3431 (NOTE E)
-
177-RD-14
200-BK-18
306-GN-18
317-YL-14
SS
TT
RR
ZZ
YY
VV
UU
UU
TT
XX
SS
WW
YY
8630-BU-18
ATCH OVERLOAD
WARNING SW
132-1828
200-BK-18
308-YL-18
DIODE
121-1022
K909-BU-18
200-BK-18
177-RD-10
101-RD-6
112-PU-6
112-PU-6
308-YL-18
112-PU-6
VV
179-BU-10
178-GN-10
101-RD-6
308-YL
110-RD-14
189-RD-14
111-RD-14
308-YL
101-RD-6
109-RD-6
ZZ
RR
MED PRESS SW
BREAKER 2
139-4724
607-PK-14
322-GY-18
616-BU
K779-PU-18
877-YL-14
304-WH-8
101-RD-6
109-RD-6
178-GN-10
179-BU-10
235-BK-18
L908-OR-18
L909-BU-18
A588-GN-18
139-OR
151-GN-18
111-RD-14
307-OR-18
BREAKER 3
139-4724
L970-GY-18
579-BR-14
101-RD-6
304-WH-8
177-RD-10
179-BU-10
308-YL
109-RD-8
177-RD-10
30A
K909-BU-18
308-YL
124-RD-14
A770-PK-18
149-PU
615-YL
154-RD-18
786-GN-18
791-RD-18
109-RD-8
304-WH-8
320-OR-18
114-RD-18
189-RD-14
115-RD-14
154-RD-18
307-OR-18
200-BK-18
NEUTRAL START
RELAY
111-4871
308-YL
109-RD-6
A770-PK-18
PLATFORM
PLATFORMCHASSIS
GROUND STRAP
7G-1060
C576-BU-18
200-BK-14
200-BK-18
C592-WH-18
519-PK-18
103-RD-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
103-RD-18
579-BR-14
152-BU
200-BK
2
1
110-RD-14
START RELAY
125-1302
200-BK-18
200-BK-18
306-GN-18
105-RD
185-YL-18
DISCONNECT SW
7N-0718
7N-0719(NOTE B)
178-GN-10
30A
DD
BREAKER 1
6T-3645
OUT 1
OUT 2
+BATTERY
IN 1
GND
IN 2
C C
A
C
A
C
B
173-YL-18
RELAY PANEL
SERVICE
METER
6T-7337
D
200-BK-18
200-BK-18
1
BACKUP
RESISTOR
102-8015
10
200-BK-18
129-BU
118-GY
K905-RD
111-RD-14
HYD LOCK SOL
RELAY
111-4871
325-PK-18
K909-BU-18
877-YL-14
K779-PU-18
616-BU
DD
BK-00
177-RD-10
140-BU
327-PK327-PK
322-GY-18
607-PK
L970-GY-18
2
8
9
3
CHASSIS
DD
200-BK
200-BK
A770-PK-18
RELAY PANEL
200-BK-18
BK-00
4
1
149-PU
149-PU-18
307-OR-18
200-BK-18
111-RD-14
189-RD-14
110-RD-14
111-RD-14
200-BK-18
151-GN-18
K909-BU-18
A
TIMER RELAY
111-4870
139-OR-18
115-RD-18
A588-GN-18
791-RD-18
607-PK
615-YL
151-GN-18
139-OR-18
200-BK
CAB/CHASSIS
LAMP RELAY
111-4871
A588-GN-18
K909-BU-18
6
115-RD-14
115-RD-14
189-RD-14
114-RD-18
5
4
5
60A
320-OR-18
791-RD-18
786-GN-18
786-GN-18
154-RD-18
615-YL
200-BK-18
149-PU
616-BU
6
3
12
2
1
7
11
8
9
HORN RELAY
111-4871
BOOM LAMP
RELAY
111-4871
10
A770-PK-18
322-GY-18
114-RD-18
124-RD-14
110-RD-14
320-OR-18
114-RD-18
A588-GN-18
124-RD-14
K909-BU-18
149-PU
30A
BAT. BREAKER
139-4724
579-BR-14
139-OR-18
151-GN-18
200-BK-18
616-BU
139-OR
149-PU
786-GN-18
168-RD-14
11
320-OR-18
322-GY-18
114-RD-18
BUS-BAR
149-5068
3
1
2
4
BUS-BAR
149-5068
7
114-RD-18
791-RD-18
150-RD-18
151-GN-18
154-RD-18
320-OR-18
189-RD-14
172-RD-18
607-PK
615-YL
12
124-RD-14
200-BK-14
MED PRESS SW
C538-OR-18
C537-GN-18
120-YL
191-WH
A588-GN-18
200-BK-18
C576-BU-18
H
103-RD-18
103-RD-18
YL
GN
BU
115-RD-14
RD
MAIN RELAY
3T-0376
L22
GY
BK
MULTISWITCH JOYSTICK-LH
122-4829
L908-OR
L909-BU
235-BK
E
D
C
B
A
235-BK
L909-BU
CONNECTOR
L908-OR
L909-BU
L908-OR
235-BK
172-RD-18
189-RD-14
320-OR-18
154-RD-18
151-GN-18
139-OR-18
120-YL
168-RD-14
115-RD-14
149-PU
140-BU
105-RD
124-RD-14
177-RD-10
118-GY
111-RD-14
103-RD-18
K905-RD
191-WH
315-GN-14
118-GY
A762-PU-18
788-YL-18
405-GY-18
140-BU
327-PK
200-BK-18
200-BK-18
200-BK-18
492-GY-18
200-BK-18
200-BK-18
129-BU
110-RD-14
C592-WH-18
519-PK-18
6
5
4
3
2
1
C537-GN-18
185-YL-18
L18
FUSE
5A 139-5345
10A 9W-1442
15A 9W-1441
111-RD-14
A A
HH
168-RD-14
HYD LOCK SOL
200-BK-14
173-YL-18
A
H
H
HH
579-BR-14
154-RD-18
189-RD-14
10
12
11
2
3
4
5
9
8
150-RD-18
10A
109-RD-6
403-GN-18
101-RD-6
10A
15A
5A
15A
5A
15A
10A
191-WH-14
120-YL
DOME LAMP
10A
10A
10A
15A
15A
AUX CKT
ACC CONVERTER
189-RD-14
5A
K905-RD
151-GN-18
5A
CIGAR LIGHTER
114-RD-18
115-RD-14
BOOM LAMP
REFUELING PUMP
140-BU
SEAT HEATER
110-RD-14
120-YL
149-PU
139-OR-18
124-RD-14
172-RD-18
103-RD-18
191-WH-14
178-GN-10
E/P CONT
5A
A/C /HEATER
A588-GN-18
115-RD-14
CAB/CHASSIS LAMP
LUBRICATOR
114-RD-18
HORN
7
6
5A
177-RD-10
124-RD-14
103-RD-18
10A
10A
10A
15A
10A
320-OR-18
200-BK-18
5A
K905-RD
112-PU-18
K779-PU-18
DIODE
121-1022
B
304-WH-8
C468-BU-18
ENG
A
200-BK-14
T
579-BR-14
RD-00
GG
2
200-BK-18
FUSE BASE
111-4812
172-RD-18
140-BU
129-BU
149-PU
168-RD-14
173-YL-18
139-OR-18
ENG GOV
315-GN-14
C576-BU-18
AIR HEATER
AIR HEATER
RELAY
111-4871
317-YL-18
VV
315-GN-14
176-YL
AUX CKT
179-BU-10
315-GN-14
110-RD-14
TIMER RELAY
WASHER/WIPER
118-GY
AUX CKT
152-BU
180-GN
AUX CKT
150-RD-18
HYD LOCK SW
579-BR-14
178-GN-10
179-BU-10
179-BU-10
177-RD-10
178-GN-10
A
H H
A
320-OR-18
FFFF
152-BU
110-RD-14
10A
BACKUP
185-YL-18
1
310-PU-18
L25
5
4
L25
C576-BU-18
C577-GY-18
C577-GY-18
L17
185-YL-18
HH
H
196-BU
INSP LAMP
1
200-BK-18
179-BU-10
189-RD-14
113-OR-18
SWITCH PANEL
200-BK-18
113-OR-18
150-RD-18
172-RD-18
173-YL-18
113-OR-18
200-BK-18
615-YL-18
179-BU-10
178-GN-10
113-OR-18
105-RD
173-YL-18
129-BU
1
6
7
8
9
5
4
3
2
11
12
10
149-PU
196-BU
129-BU
178-GN-10
196-BU
185-YL-18
152-BU
118-GY
120-YL
191-WH14
140-BU
139-OR-18
111-RD-14
615-YL-18
105-RD
110-RD-14
168-RD-14
K905-RD
H414-YL-18
KEY SW
105-RD
103-RD-18
124-RD-14
114-RD-18
115-RD-14
113-OR-18
A58-GN-18
310-PU-18
2
3
1
2
1
B
B
A
519-PK-18
C576-BU-18
C577-GY-18
6
5
4
3
140-BU 140-BU
200-BK-18
200-BK-18
200-BK-18
2
1
RD-00
C592-WH-18
AUX HYD RELAY
111-4871
200-BK-18
200-BK-18
C592-WH-18
L970-GY-18
11
12
1
2
3
4
5
6
7
8
9
10
877-YL-14
519-PK-18
877-YL-14
12
11
10
9
8
7
6
5
4
3
2
1
315-GN-14315-GN-14
C577-GY-18
200-BK-18
1
2
B
ATCH MEDIUM PRES.
VALVE
140-BU
310-PU-18
K904-GN-18
K997-BU-18
3
A769-GY-18
A768-BU-18
L978-GY-18
140-BU
763-BU-18
399-OR
6
B
L977-YL-18
B
COLD ADVANCE
SOL
GROUND STRAP
134-3344
H415-BR-18
5
4
2
1
955-BU-18 955-BU-18
COOLANT TEMP SW
126-5983
8630-BU-188630-BU-18
152-BU
140-BU
B
2
1
200-BK-18
200-BK
HH
ZZ
THIS SCHEMATIC IS FOR THE 315B-HYD EXCAVATOR
(1343300 CHG H01).
COMPONENTS ARE SHOWN INSTALLED ON A FULLY
OPERABLE MACHINE WITH THE KEY AND ENGINE OFF.
UNLESS OTHERWISE SPECIFIED ALL WIRE IS 16 GAUGE.
CC
BB
AA
CABLE AS.
XX
WIRE AS.
K779-PU-18
B
L
K
J
H
G
E
D
C
B
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
IDENT PART NO. LOC
HARNESS AS.
NOTE B; USE WITH COLD WEATHER.
A
N
R984-YL-18
WW
R983-GN-18
C577-GY-18
R
S
200-BK
200-BK
140-BU
A
L15
955-BU-18
MULTISWITCH JOYSTICK-RH
122-4828
A
1
2
C577-GY-18
2
1
R984-YL-18
BK
R983-GN-18
R983-GN-18
R984-YL-18
638-WH
GY
8630-BU-18
C592-WH-18
172-RD-18
189-RD-14
320-OR-18
154-RD-18
151-GN-18
139-OR
114-RD-18
168-RD-14
115-RD-14
149-PU
140-BU
177-RD-10
111-RD-14
519-PK-18
K906-GN-18
F773-OR-18
F774-WH-18
A770-PK-18
A769-GY-18
A768-BU-18
791-RD-18
311-WH-18
786-GN-18
OPERATOR STATION
K909-BU-18
A771-PU-18
L978-GY-18
L974-GN-18
L977-YL-18
K997-BU-18
788-YL-18
A762-PU-18
763-BU-18
412-BU-18
C468-BU-18
321-BR-18
405-GY-18
492-GY-18
491-PK-18
495-GN-18
430-BU-18
496-WH-18
K904-GN-18
A761-PU-18
L971-GN-18
317-YL-18
487-OR-18
615-YL-14
403-GN-18
506-PU-18
L970-GY-18
A
B B
AA
A
310-PU-18
139-OR-18
615-YL-14
111-RD-14
177-RD-10
151-GN-18
149-PU
115-RD-14
114-RD-18
154-RD-18
320-OR-18
786-GN-18
791-RD-18
A770-PK-18
A588-GN-18
L970-GY-18
K909-BU-18
189-RD-14
412-BU-18
168-RD-14
A769-GY-18
491-PK-18
496-WH-18
495-GN-18
403-GN-18
788-YL-18
A762-PU-18
C468-BU-18
405-GY-18
492-GY-18
A768-BU-18
F774-WH-18
F773-OR-18
A761-PU-18
K904-GN-18
172-RD-18
K906-GN-18
A771-PU-18
L974-GN-18
L978-GY-18
L977-YL-18
763-BU-18
K997-BU-18
A
B
506-PU-18
C576-BU-18
BK/PK
BK
321-BR-18
513-OR-18
200-BK-18
506-PU-18
200-BK-18
412-BU-18
ATCH REFRIGERANT
LOW PRESS. SW
114-5333 (NOTE A)
ATCH
TRAVEL ALARM
3E-7738
519-PK-18
B
COOLANT
LEVEL SW
096-0744
MOTOR
WASHER
7T-8890
CC BB
AA
200-BK-18
412-BU-18
487-OR-18
140-BU
BATTERY
3T-5760
POS
NEG NEG
POS
L971-GN-18
A
ON(KEY)
GROUND 2
1
ATCH AUTO
LUBRICATION PUMP
127-5264
RD-00RD-00BK-00
579-BR-14
L21
403-GN-18
L908-OR-18
L909-BU-18
235-BK-18
235-BK-18
L909-BU-18
L908-OR-18
C592-WH-18
K997-BU-18
763-BU-18
L977-YL-18
L978-GY-18
L974-GN-18
A771-PU-18
K906-GN-18
K904-GN-18
A761-PU-18
F773-OR-18
F774-WH-18
L971-GN-18
487-OR-18
172-RD-18
A768-BU-18
168-RD-14
321-BR-18
492-GY-18
405-GY-18
C468-BU-18
A762-PU-18
788-YL-18
403-GN-18
495-GN-18
496-WH-18
491-PK-18
A769-GY-18
200-BK-18
200-BK-18
200-BK-18
179-BU-10
178-GN-10
124-RD-14
308-YL
L20
A A
AIR CLEANER SW
109-9330
430-BU-18
616-BU
317-YL-18
638-WH
310-PU-18 310-PU-18
322-GY-18
607-PK-14
877-YL-14
327-PK
L970-GY-18
109-RD-6
101-RD-6
317-YL-18
304-WH-8
110-RD-14
200-BK-18
BB
BK-00 RD-00 RD-00
POS
NEGNEG
POS
BATTERY
3T-5760(NOTE B)
GG
BBHH
321-BR-18
179-BU-10
178-GN-10
308-YL
307-OR-18
579-BR-14
124-RD-14
BB
A588-GN-18
L23
L23
L23
L23
L22L22
L17
L16
L10
L14
L14
307-OR-18
110-RD-14
140-BU
315-GN-14
AIR HEATER
RESISTOR
7W-1251
317-YL-14
308-YL
877-YL-14
111-RD-14
189-RD-14
110-RD-14
317-YL-18
310-PU-18
140-BU
154-RD-18
307-OR-18
579-BR-14
327-PK
TT
151-GN-18
A588-GN-18
L970-GY-18
616-BU
786-GN-18
149-PU
791-RD-18
607-PK
615-YL
115-RD-14
320-OR-18
322-GY-18
RR
114-RD-18
U
U
L27
200-BK-18
H415-BR-18
PRESS. SW
OPERATOR STATION
G
G
2
C
B
A
3
1
H415-BR
200-BK
H415-BR
200-BK
OVERLOAD WARNING PRESSURE
SW 144-3614
A
18-BK
18-RD
B
1
2
200-BK-14
L27
L27
L27
L27
590-GY-18
501-GN-18
129-BU-18
403-GN-18
K911-PK-18
K912-GN-18
103-RD-18
615-YL-18
A586-OR-18
C537-GN-18
C538-OR-18
K997-BU-18
8 C576-BU-18
C577-GY-18
200-BK-14
U
615-YL-18
SPEAKER LH-
SPEAKER LH+
SPEAKER RH-
SPEAKER RH+
+12V LIGHT
GROUND
MEMORY +12V
509-WH-18
508-PU-18
512-GN-18
511-BR-18
633-BU-18
210-BK
508-PU-18
C578-YL
B+ 12V
512-GN-18
511-BR-18
509-WH-18
139-OR-18
7
8
4
3
5
2
6
1
ATCH
AM/FM RADIO
LIGHT IN (DC24V)
4
615-YL-18
12V SW OUT
GND
8
7
6
200-BK-18
H415-BR-18
C578-YL
135-BU
118-GY
T
615-YL-14
638-WH
L970-GY-18
506-PU-18
615-YL-14
615-YL-14
7
120-YL
103-RD-18
118-GY
103-RD-18
129-BU
K905-RD
C583-OR-18
C537-GN-18
524-BU
590-GY-18
501-GN-18
A586-OR-18
200-BK-14
200-BK-14
K997-BU-18
403-GN-18
200-BK-18
K905-RD
235-BK
K911-PK-18
K912-GN-18
T
5
3
2
1
200-BK
+24V BAT IN MEM
LIGHT OUT (DC12V)
+12V MEM OUT
+24V SW IN
GND
120-YL
135-BU
210-BK
139-OR-18
633-BU-18
103-RD-18
CONVERTER
1310327
12V 7A
200-BK
9
8
7
11
3
6
10
1
2
5
4
12
2
1
615-YL
615-YL
200-BK
524-BU
638-WH
200-BK
1
A
2
1
524-BU
2
135-BU
210-BK
12V SOCKET
9R-7941
524-BU
118-GY
615-YL
103-RD-18
200-BK-18
LUNCH BOX LIGHT
506-PU
120-YL
C578-YL
103-RD-18
135-BU
118-GY
CAB
DOME LAMP
096-0721
2
3
4
5
6
1
8
7
ATCH SPEAKER(L)
7Y-5505
ATCH SPEAKER(R)
7Y-5505
7
6
5
4
3
8
1
2
200-BK-18
A
A A
ANTENNA
6C-3431
L26
ATCH
ROTATING BEACON
L4
L3
E
E
E
E
E
E
E
E
D
200-BK
200-BK-18
103-RD-18
L972-BU-18
308-YL-18
A758-BR-18
A757-GY-18
A756-BU-18
A755-PK-18
K912-GN-18
K911-PK-18
235-BK-18
L909-BU-18
L908-OR-18
487-OR-18
954-GN-18
L972-BU-18
A758-BR-18
A757-GY-18
200-BK-18
317-YL-18
K912-GN-18
K911-PK-18
A756-BU-18
A755-PK-18
235-BK-18
K905-RD-18
308-YL-18
235-BK-18
K905-RD-18
235-BK
K905-RD
F771-OR-18
F772-WH-18
K907-BU-18
L968-OR-18
L969-WH-18
L971-GN-18
L970-GY-18
A761-PU-18
200-BK-18
F771-OR-18
K904-GN-18
496-WH-18
430-BU-18
F772-WH-18
495-GN-18
K907-BU-18
L968-OR-18
491-PK-18
492-GY-18
MONITOR +B OUT
THROTTLE DIAL S1
THROTTLE DIAL S2
THROTTLE DIAL S3
THROTTLE DIAL S4
GOV ACTR (A)
EPR VALVE (+)
GOV ACTR (B)
GOV ACTR FDBK
COOLANT LEVEL SW
TRAVEL SPEED SOL
ENG SPEED SENSOR (-)
ENG SPEED SENSOR (+)
TRENCHING SOL
IMPLEMENT PRESS. SW
ENG OIL LEVEL SW
FUEL LEVEL SENSOR
405-GY-18
321-BR-18
FRONT PUMP PRESS. SENSOR
HYD OIL LEVEL SW
AIR CLEANER SENSOR
L969-WH-18
HYD OIL TEMP SENSOR
RS485 - (VALVE CONT)
RS485 + (VALVE CONT)
RS232C (GND)
RS232C (RX)
COOLANT SENSOR
9
20
10
28
31
26
13
30
29
35
40
2
6
39
6
24
25
22
15
ALTERNATOR (W TERM)
RS485 - (RH JOYSTICK)
7
38
12
TRAVEL ALARM
ENG OIL PRESS. SW
36
SWING BRAKE SOL
C468-BU-18
412-BU-18
763-BU-18
A762-PU-18
788-YL-18
23
EPR VALVE (-)
17
21
8
RS485 + (LH JOYSTICK) 7
L977-YL-18
8
L974-GN-18
L978-GY-18
A771-PU-18
RS485 - (LH JOYSTICK)
RS485 + (PEDAL)
9
403-GN-18
10
RS485 + (SEMI AUTO)
RS485 - (PEDAL)
RS485 + (RADIO CONT)17
HYD TANK PRESS. SW
RS485 + (MONITOR)
RS485 - (SEMI AUTO)
HYD TANK INDICATOR
RS485 + (RH JOYSTICK)
RS485 - (MONITOR)
27
18 TRAVEL PRESS. SW
HYD OIL FILTER INDICATOR
18 RS485 - (RADIO CONT)
RS485 + (ELEC GOV)19
+B
+B
AIH INDICATOR
FINE SWING SW
K997-BU-18
BOOM RAISE PRESS. SW
LEVEL FINISH SOL
DUAL PWR SOL
AUX HYD PRESS. SW
32
33
25
KEY SW ON
RS485 - (ELEC GOV)
26
12
40
2
4
28
27
LOW IDLE SW
21
20
1
11
22
34
3
24
23
14
13
16
15
5
36
35
29
31
30
39
38
37
GND
GND
HAMMER PRESS. SW
RS232C (TX)
AIH INDICATOR
A
37
4
3
OPTION SENSOR (PWM)
T
1
16
19
5
OPTION SENSOR (PWM)
32
33
14
11
34
JOYSTICK +B OUT
A A
AA
A A
2
3
4
5
6
1
K905-RD
235-BK
317-YL-18
954-GN-18
K997-BU-18
L970-GY-18
L971-GN-18
487-OR-18
A761-PU-18
K904-GN-18
496-WH-18
430-BU-18
K997-BU-18
495-GN-18
491-PK-18
492-GY-18
405-GY-18
7
8
1
6
5
4
3
2
321-BR-18
C468-BU-18
412-BU-18
2
3
4
5
6
11
1
10
9
8
7
12
763-BU-18
A762-PU-18
788-YL-18
403-GN-18
L977-YL-18
L974-GN-18
L978-GY-18
A771-PU-18
K997-BU-18
K997-BU-18
L908-OR-18
L909-BU-18
235-BK-18
A
L10
A
954-GN-18
C576-BU-18
BK
YL
616-BU
200-BK
200-BK
R984-YL-18
D
K779-PU-18
10
200-BK-18
200-BK-18 200-BK-18
616-BU
322-GY-18
607-PK-14
168-RD-14
200-BK-18
200-BK-18
200-BK-18
200-BK-18
K906-GN-18
495-GN-18
SWING BRAKE
SOL
121-1491
B
2
1
200-BK-18
200-BK-18
K906-GN-18
PP
FUEL
SENSOR
105-9911
ATCH
REFUELING SW
5C-6108
2
1
B
325-PK-18
495-GN-18
616-BU
322-GY-18
607-PK-14
168-RD-14
200-BK
200-BK-14
168-RD-14
607-PK-14
200-BK-14
200-BK-14
607-PK-14
168-RD-14 A
B
NB
S S
200-BK-14
200-BK
607-PK-14
200-BK-18
616-BU
200-BK-18
200-BK-14
200-BK-14
322-GY-18
200-BK
200-BK-18
322-GY-18
N
200-BK
S
168-RD-18
200-BK-14
L976-GN-18
B
B
B
B
ATCH
BOOM LAMP
5I-8250
CHASSIS
ATCH
REFUELING
PUMP
123-3928
ATCH
REFUELING
START SW (NO)
6T-9442
R
N
N
HORN
7T-0969
J
K
J
K
200-BK-18
323-WH-14
+
-
616-BU
1
2
200-BK-14
ATCH
REFUELING
RELAY 2
111-4871
ATCH
REFUELING
RELAY 1
111-4871
200-BK-14
168-RD-14
168-RD-14
168-RD-18
168-RD-14
168-RD-14
200-BK-18
365-YL-18
L976-GN-18
325-PK-18
365-YL-18
RR
ATCH
REFUELING
STOP SW (NC)
9X-4184
365-YL-18
L976-GN-18
L976-GN-18
200-BK-18
365-YL-18
L976-GN-18
322-GY-18
616-BU
CHASSIS
LAMP
5I-8251
ATCH
BOOM LAMP
5I-8250
B PP
325-PK-18
325-PK-18 325-PK-18
1
2
2
1
1
2
325-PK-18
325-PK-18 325-PK-18C
2
1
HORN
7T-0970
L4
L3
L3
L4
L1
L1
N
519-PK-18
N
EE
EE
2
1
306-GN-18
173-YL-18
F773-OR-18
F774-WH-18
A770-PK-18
A769-GY-18
A768-BU-18
K906-GN-18
307-OR-18
308-YL
791-RD-18
786-GN-18
B
185-YL-18
RD
BU
105-RD
113-OR-18
9
8
11
7
1
2
12
3
8
XXWW
HEATER RELAY
111-4871
140-BU
R983-GN-18
315-GN-14
140-BU
C592-WH-18
311-WH-18
317-YL-18
311-WH-18
317-YL-18
C576-BU-18
327-PK
140-BU
405-GY-18
524-GN
788-YL-18
7
6
5
A762-PU-18
RD-00
C592-WH-18
615-YL-18
4
3
2
6
ATCH START
AID SOL
3T-9493
A586-OR-18
501-GN-18
GN
D
YL
L972-BU-18
A758-BR-18
A757-GY-18
A756-BU-18
G
A755-PK-18
K907-BU-18
L968-OR-18
2
L969-WH-18
172-RD-18
A762-PU-18
HAMMER SW
788-YL-18
RIGHT SW
LOW IDLE AND
PRESS. RAISE SW
877-YL-14
G
1
304-WH-8
101-RD-6
200-BK
F772-WH-18
A
317-YL-18
T
ATCH COOLANT
TEMP SW
8N-1693
K909-BU-18
MOTOR
BAT
MTR
200-BK-18
200-BK-18
S
B
311-WH-18
615-YL-14
2
1
G
G
G
200-BK-18
113-OR-18
791-PK-18
786-GN-18
A586-OR-18
501-GN-18
590-GY-18
A755-PK-18
5
A756-BU-18
4
A757-GY-18
L21
CC
RELAY PANEL
311-WH-18
A758-BR-18
105-RD-14
615-YL-18
307-OR-18
308-YL-18
308-YL-18
200-BK-18
200-BK-18
200-BK-18
152-BU
191-WH-18
877-YL-14
955-BU-18955-BU-18
L972-BU-18 L972-BU-18
H415-BR-18
H414-YL-18
H414-YL-18
A537-PK-18
G
H414-YL-18
F771-OR-18
B
311-WH-18
308-YL
H415-BR-18
G
ATCH OVERLOAD
WARNING BUZZER
113-4683
590-GY-18
K909-BU-18
310-PU-18
152-BU
200-BK-18
8630-BU-18
191-WH-18
135-BU
C578-YL
FF
191-WH-18 191-WH-18
A537-PK-18
A537-PK-18
RD-00
FUEL PUMP
FUEL PUMP
RESISTOR
7T-4003
200-BK
327-PK
GG
140-BU
327-PK
140-BU
317-YL-14
317-YL-18
200-BK-18
315-GN-14
308-YL-18
C592-WH-18
200-BK-18
310-PU-18
317-YL-14
317-YL-18
306-GN-18
307-OR-18
954-GN-18
L970-GY-18
524-BU
L19
2
1
200-BK-18
200-BK-18
638-WH
200-BK-18
200-BK-18
L24
DIODE
121-1022
C592-WH-18
C577-GY-18
L9
200-BK-18
154-RD-18
579-BR-14
124-RD-14
308-YL-18
200-BK-18
327-PK
140-BU
306-GN-18
200-BK-18
1
2
2
1
1
2
ENG
GROUND STRAP
134-3355
1
2
1
2
18-WH
18-BK
200-BK-18
D
200-BK-18
638-WH
200-BK
D
L3
L3
L3
L3
E
615-YL
615-YL
E
118-GY
524-BU
200-BK
C
+
S
B
-
MOTOR
MOTOR
C
B
A58-GN-18
A
114-RD-18
C592-WH-18
L25
152-BU
A
L LE
ATCH- CAB LAMP
5I-8250
491-PK-18
487-OR-18
168-RD-14
496-WH-18
310-PU-18
K909-BU-18
L972-BU-18
590-GY-18
308-YL-18
F771-OR-18
191-WH-18
200-BK-18
ATCH
SEAT WITH
SEAT HEATER
111-6458
L6
G
F772-WH-18
L7
200-BK
200-BK
308-YL
L969-WH-18
L968-OR-18
K907-BU-18
A755-PK-18
L6 L6
A756-BU-18
A757-GY-18
D
CIGAR
LIGHTER
9W-0335
UPPER
WIPER MOTOR
131-0399
E
PP
SS
UU
200-BK-18
A758-BR-18
315-GN-14
L10
L20
L1
L1
L972-BU-18
501-GN-18
A586-OR-18
615-YL-14
113-OR-18
105-RD
185-YL-18
786-GN-18
791-RD-18
308-YL
307-OR-18
L11
L12
K906-GN-18
L13
L17
L18
L19
L5
310-PU-18
L17
L16
L12
L12
L13
L13
L9
L24
L13
A768-BU-18
A769-GY-18
A770-PK-18
6
3
HEATER
144-3680
F774-WH-18
L11
F773-OR-18
L14
173-YL-18
L6
C577-GY-18
315-GN-14
315-GN-14
173-YL-18
L25
L7
L7
G
L4
L5
LL
118-GY
L4
L4
L3
L9
200-BK-14
L1
L3
YY
NOTE E: USE WITH A/C UNIT.
STRAP AS.
DD
NOTE A: NORMALLY OPEN BEFORE REFRIGERANT CHARGE.
EE
G-7
F-9
G-7
F-9
F-9
F-9
G-7
G-1
C-2
C-2
H-4
E-4
B-6
B-5
G-8
A-2
B-2
G-7
B-2
B-3
G-3
H-7
G-7
C-3
C-3
G-6
F-9
A-2
G-7
H-7
G-7
G-9
A-8
150-6938
140-0576
150-6934
134-3275
116-0080
140-0905
150-6943
137-1840
140-0920
134-3298
156-4084
156-4082
144-9617
130-6568
156-4080
155-7215
128-8876
150-6937
116-0096
116-0098
155-7214
150-6940
150-6942
144-7629
144-3080
7G-1060
140-0575
132-1827
150-6941
150-6939
150-6935
134-3344
134-3355
C358-OR-18
111-RD-14
TO MACHINE STRUCTURE
524-BU
173-YL-18
173-YL-18
173-YL-18
308-YL
308-YL
115-RD-14
124-RD-14
139-OR-18
SERVICE
CONN 1
CONN 6 CONN 8
CONN 9
CONN 7
CONN 2
CONN 3 CONN 4 CONN 5
CONN 10 CONN 11
CONN 14
CONN 15
CONN 18
CONN 17
CONN 16
CONN 22
CONN 21
CONN 20
CONN 19
CONN 12
CONN 13
CONN 23
CONN 24 CONN 25 CONN 26
CONN 27
CONN 28
CONN 34
CONN 33
CONN 32
CONN 31CONN 30
CONN 29
H
G
J
F
E
D
C
B
A
9 8 7
9 8 7
6 5 4
6 5 4
3 2 1
3 2 1
G
J
H
F
E
D
C
B
A
E97608
WIRES THAT HAVE BATTERY VOLTAGE
WHEN THE KEY SWITCH IS OFF.
WIRES THAT HAVE BATTERY VOLTAGE
WHEN THE KEY SWITCH IS ON.
STARTING CIRCUIT.
GAUGE CIRCUIT.
MONITORING SYSTEM CIRCUIT.
WASHER/WIPER CIRCUIT.
HEATER AND AIR CONDITIONER CIRCUIT.
GROUND CIRCUIT.
START AID CIRCUIT.
ENGINE/PUMP CONTROL CIRCUIT.
ALL DASHED LINES ARE ATTACHMENTS.
