315 & 315 L ELECTRICAL SYSTEM SCHEMATIC

©
1994 Caterpillar
All Rights Reserved
Printed in U.S.A.
SENR6183
October 1994
315 And 315 L Excavator
Electrical System
4YM1-UP
6YM1-UP
Connectors
Connector
No. And
Machine
Location
Harness And/Or Components
Schematic
Location
Connectors
Connector
No. And
Machine
Location
Harness And/Or Components
Schematic
Location
40 Contacts
CONN 1
*
A - 105-9878
Controller
B-7
CONN 12 P - 7Y-8139, S - 7Y-8105
F - 5I-8216
C-6
24 Contacts
CONN 2
*
A - 105-9878
Controller
A-7
CONN 30 E - 111-4712
Monitor
E-2
CONN 9
A - 105-9878
B - 116-0139
E-12
CONN 32 C - 5I-8217
Wiper Motor
F-2
CONN 8
A - 105-9878
B - 106-0139
F-12
CONN 12 S - 7Y-8105
F - 5I-8216
D-6
CONN 13 A - 105-9878
F - 5I-8216
C-5
CONN 43 P - 7Y-8139
Speaker
B-6
CONN 24 A - 105-9878
G - 7Y-3922
D-3
CONN 21 H - 4I-5463
Lower Wiper Switch
C-3
CONN 18 A - 105-9878
H - 4I-5463
D-4
CONN 29 R - 7Y-8105
Converter
D-6
CONN 17 A - 105-9878
K - 4I-5411
F-5
CONN 16 R - 5I-8376
Speaker
B-6
CONN 3 A - 105-9878
L - 105-9902
E-9
CONN 25 A - 105-9878
G - 7Y-3922
D-3
CONN 5 A - 105-9878
L - 105-9902
F-9
CONN 23 A - 105-9878
J - 7Y-3868
F-3
CONN 6 A - 105-9878
L - 105-9902
F-9
CONN 39 B - 105-9877
Refrigerant Low Press Switch
B-12
CONN 4 B - 116-0139
L - 105-9902
D-9
CONN 45 B - 105-9877
Travel Alarm
B-12
9 Contacts
CONN 57 C - 7Y-8139
Radio
C-6
CONN 50 B - 116-0139
Boom Raise Press Switch
B-8
7 Contacts
CONN 14 A - 105-9878
E - 111-4712
C-5
CONN 49 B - 116-0139
Fuel Level Sensor
B-5
CONN 10 A - 105-9878
B - 116-0139
E-12
CONN 51 B - 116-0139
Implement Swing Press Switch
B-8
CONN 11 B - 116-0139
Safety Relay
E-9
CONN 53 B - 116-0139
Level Solenoid
A-8
CONN 28 C - 5I-8217
F - 5I-8216
E-2
CONN 38 B - 116-0139
M - 105-9880
B-2
CONN 15 A - 105-9878
Air Conditioner Unit
E-6
CONN 48 B - 116-0139
ZZ - 5I-8258
A-5
CONN 19 A - 105-9878
H - 4I-5463
D-5
CONN 56 B - 116-0139
Proportional Reducing Valve
A-8
CONN 15 A - 105-9878
Heater Unit
E-6
CONN 41 B - 116-0139
Refueling Pump
A-3
CONN 44 L - 105-9902
Governor Actuator
C-7
CONN 34 B - 116-0139
Refueling Pump Switch
A-3
CONN 27 G - 7Y-3922
Engine Speed Dial
C-2
CONN 42 B - 116-0139
Speed Sensor
A-10
CONN 58 A - 105-9878
A - 105-9878
C-7
CONN 52 B - 116-0139
Travel Press Switch
C-8
CONN 33 A - 105-9878
Lower Wiper Motor
F-2
CONN 55 B - 116-0139
Travel Speed Solenoid
A-8
* = Connector is located at the component. D = Connector in relay box.
A = Connector at the bottom of the cab. E = Connector on main control valve.
B = Connector in right console.
F = Connector near pilot oil manifold.
C = Connector in left console.
Harness Connector Location Chart
10 Contacts
6 Contacts
5 Contacts
4 Contacts
4 Contacts
3 Contacts
2 Contacts
Connectors
Connector
No. And
Machine
Location
Harness And/Or Components
Schematic
Location
Connectors
Connector
No. And
Machine
Location
Harness And/Or Components
Schematic
Location
CONN 54 B - 116-0139
Trenching Solenoid
A-8 2 Contacts
CONN 20 J - 7Y-3868
Horn Switch
F-2
CONN 31 E - 111-4712
Alarm Fault
D-2
CONN 26 G - 7Y-3922
Low Idle Switch
D-3
CONN 35 F - 5I-8216
D - 7Y-8245
F-1
CONN 46 B - 116-0139
V - 116-0140
A-10
CONN 22 H - 4I-5463
Lower Washer Switch
B-3
CONN 7 S - 7Y-8105
Converter
D-6
CONN 37 B - 116-0139
Air Conditioner Clutch Solenoid
B-10
CONN 36 F - 5I-8216
D - 7Y-8245
E-1
CONN 59 A - 105-9878, U - 106-0027
T - 106-0026
E-5
CONN 60 T - 106-0026
Radio Control Switch
E-4
Three
NOTE: Each of CONN3, 5, 6, 8 and 9 located in area D has 10 poles with different
number of plugs, as shown below. The following chart will help you to identify them.
Two
Two
No
One
Harness Connector Location Chart - Continued
2 Contacts
Bullet
Terminal
Connector No. In Area D
CONN 5
CONN 6
CONN 3
CONN 8
CONN 9
Plug No.
Machine
Location
Components
Schematic
Location
Machine
Location
Components
Schematic
Location
11D Actuator - Governor C-7 9D Relay - Safety E-9
3A Alarm - Fault D-2 21 Relay - Starter A-10
2 Alarm - Travel B-12 7D Relay - Washer E-8
3 Alternator B-10 7D Relay- Wiper E-8
4 Antenna C-6, D-6 1C Resistor - Backup F-5
5 Battery D-12 1F Sender - Hydraulic Oil Temperature B-8
1D Block - Terminal D-9 22 Sensor - Engine Coolant Temperature B-10
4D Breaker D-9 23 Sensor - Fuel Level B-5
10D Controller A-7 24 Sensor - Speed A-10
7 Converter D-6 25 Solenoid - Air Conditioner Compress Clutch B-10
3B Dial - Engine Speed C-2 26 Solenoid - Engine Shutdown B-10
6D Fuse - Block F-7, 8, 9 5F Solenoid - Level A-8
8 Heater - Air (Glow Plug) A-12 3F Solenoid - Travel Speed A-8
9 Horn A-2, B-2 2F Solenoid - Trenching A-8
10 Lamp-Boom A-1, B-1 27 Speaker B-6
11 Lamp - Cab E-1, F-1 3E Switch - Boom Raise Press B-8
12 Lamp - Chassis A-2 5D Switch - Disconnect D-9
13 Lamp - Dome C-6 28 Switch - Engine Oil Press B-10
1A Lighter - Cigar D-3 4B Switch - Governor Backup C-5
2A Meter - Service E-2 3C Switch - Horn F-2
4A Monitor E-2 1E Switch - Implement Swing Press B-8
14 Motor - Lower Washer C-12 2B Switch - Low Idle D-3
15 Motor - Lower Wiper F-2 6B Switch - Lower Washer B-3
16 Motor - Starter A-10 7B Switch - Lower Wiper C-3
17 Motor - Washer C-12 29 Switch - Neutral Start F-2
18 Motor - Wiper F-2 2C Switch - Pump Backup F-4
19 Pump - Refueling A-3 4C Switch - Radio Control E-4
20 Radio C-6 30 Switch - Refrigerant Low Press B-12
7D Relay - Boom Lamp E-8 31 Switch - Refueling A-5
7D Relay - Chassis/Cab Lamp E-8 32 Switch - Refueling Pump A-3
2D Relay - Engine Shutdown D-7 5B Switch - Speed Change B-4
8D Relay - Heater D-8 1B Switch - Starter C-2
7D Relay - Horn E-7 2E Switch - Travel Press C-8
3D Relay - Main D-7 33 Unit - Air Conditioner E-6
7D Relay - Refueling Pump E-7 34 Unit - Heater E-6
A = Component at the bottom of the cab. 4F Valve - Proportional Reducing A-8
B = Component in right console.
C = Component in left console.
D = Component in relay box.
E = Component on main control valve.
F = Component near pilot oil manifold.
Component Location Chart
A
1
2
3
4
5
7
8
9
10
11
12
13
14
15
16
3
4
5
8
9
10
11
12
14
15
13
16
B
C
D
E
1
7
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
2
F
11
27
10
9
17
18
19
20
21
22
23
24
26
27
28
29
A
1
2
3
4
5
7
8
9
10
11
12
13
14
15
16
3
4
5
6
8
9
10
11
12
14
15
13
16
B
C
D
E
1
7
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
2
F
17
18
19
20
21
22
23
24
25
26
27
Machine Harness Connector and Component Locations
3150072
1
2
3
4
5
6
2
1
4
3
3
4
5
6
4
3
1
2
1
2
7
AREA A
AREA B
3110084
3110083
1
2
3
4
5
6
7
8
9
10
5
4
3
1
3
4
5
6
8
9
11
1
4
3
10
2
1
2
7
AREA C
AREA D
3150073
3110085
1
2
3
4
1
3
2
8
3
4
5
1
3
1
2
2
3110087
3150070
AREA F
AREA E
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.
6
D
8
D
4
A
1
1
B
1
C
3
D
1
D
2
D
5
D
2
5
D
7
D
4
D
3
4
2
B
4
10
D
3
B
3
E
2
F
9
D
7
4
F
19
20
21
2
E
3
F
17
18
14
15
1
E
16
11
26
12
13
9
8
10
5
B
8
1
A
1
F
2
A
22
6
B
23
24
25
4
C
5
C
3
C
4
C
27
1
D
2
D
3
D
6
D
8
D
2357101112
101112
A
A
AA
OPTION SOLENOID
COOLANT LEVEL SW
ENG OIL LEVEL SW
OPTION SENSOR
OPTION SW 1
OPTION SW 2
OPTION RELAY 3
OPTION RELAY 2
OPTION RELAY 1
GLOW
RS232C RxD
RS232C TxD
PWM OUT -
PWM OUT +
WASHER RELAY
WIPER MOTOR RELAY
CHASSIS LAMP RELAY
BOOM LAMP RELAY
GND
GND
+B (24V)
BACKUP SW 1
RS485 -
RS485 +
BACKUP SW 4
ENG PICKUP SENSOR -
TRAVEL SW
ENG PICKUP SENSOR +
TRAVEL SOLENOID
FUEL LEVEL SENSOR
COOLANT SENDER
HYD OIL TEMP SENDER
TRAVEL ALARM
4
3
17
18
24
23
16
3
12
6
4
5
18
14
9
22
1
7
8
13
2
20
19
17
15
10
11
10
11
21
31
23
28
8
9
6
7
19
20
30
40
36
37
38
39
29
27
13
LOW IDLE SW
24
14
35
25
BACKUP SW 2
15
16
26
OR-18
2
4
5
EPR VALVE +
EPR VALVE -
1
3
34
33
MONITOR ALARM
KEY SW
ATTACHMENT
32
22
12
2
1
135-BU
BK-18
210-BK
RD-18
BK-18
GROUND
+12 VOLT
+ BATTERY
GROUND
1
2
3
2
1
ATCH
CONVERTER
7T-8000
ATCH
ANTENNA
106-0036
3
1
4
2
S
S
S
S
TO RADIO
200-BK
ALTERNATOR (P TERM.)
HARNESS CODE 1
HARNESS CODE 2
HARNESS CODE 3
HARNESS CODE 4
ENG OIL PRESS. SW
HYD OIL LEVEL SW
THROTTLE DIAL S4
F
200-BK
103-YL
122-BU
615-YL
L 105-9902 F-9
ATCH
105-9362 (NOTE C)
101-1759 (NOTE D)
ATCH
A/C UNIT
105-9464 (NOTE C)
105-9406 (NOTE D)
103-YL
124-GN-14
200-BK-14
519-PK
2
A
1
3
4
5
GROUND
S
P
L
R
B
615-YL
306-GN
THROTTLE DIAL S3
THROTTLE DIAL S2
THROTTLE DIAL S1
IMPLEMENT SW
ENG SHUTDOWN RELAY
TRENCHING SOLENOID
LEVEL FINISH SOLENOID
320-OR
WH/YL
A755-PK
BK
A756-BU
A757-GY
WH/GN
A758-BR
105-BR
YL
310-PU
WH/BU
308-YL
309-GY
B786-BU
491-PK
A771-PU
B737-GN
B965-GY
B964-YL
763-BU
495-GN
492-GY
321-BR
405-GY
788-YL
185-YL
A762-PU
D746-PK
332-BU
877-YL
308-YL
410-WH
A758-BR
A757-GY
A756-BU
A755-PK
B786-BU
B956-PK
B955-YL
B789-BR
B790-OR
B739-WH
B740-OR
B730-OR
B731-WH
A768-BU
184-BU
A983-BU
792-OR
791-PK
786-GN
267-BK
266-BK
265-BK
264-BK
235-BK
235-BK
877-YL-8
101-RD-4
109-OR-6
327-PK-14
616-BU
607-PK
323-WH
365-YL
R
R
L19
ATCH RADIO (NOTE C)
A
B ZZ
325-PK
2
322-GY
1
G
506-PU
121-YL
142-BU-14
U 106-0027 E-5 (NOTE D)
T 106-0026 E-5 (NOTE C)
122-BU
RADIO FOR JAPAN
RADIO FOR OUTSIDE JAPAN
T
1
2
BK-14
BK/PK-14
ATCH
RADIO SW
7X-6386
(NOTE C)
L18 L17
L13
BK-00
B751-YL
A763-GY
A761-PU
200-BK
113-OR
7Y-5465
200-BK
L14
L15
142-BU
200-BK
200-BK
1
615-YL
2
3
4
G
185-YL
A768-BU
A769-GY
B730-OR
B731-WH
J
G
763-BU
200-BK
142-BU
B955-YL
B956-PK
113-OR
A
201-BK GROUND
152-BU
615-YL
615-YL
519-PK
124-GN-14
578-BU
+
S
+1
-
MOTOR
L16
L12
L15
235-BK
2
1
200-BK
365-YL
122-BU
200-BK-14
A
J
PLATFORM
323-WH
607-PK
5
1
2
3
4
ONE TOUCH
LOW IDLE SW
6I-5088
615-YL
200-BK
500-BR
5
4
3
1
B
BB
B
BBB
AA
VV
L18
B
B
B
B
L
B
LA
L
L
200-BK
A761-PU
L21
L22
L16
L16
L21
L22
113-OR
A761-PU
A763-GY
B751-YL
L20
495-GN
200-BK
120-YL
200-BK307-OR
VV 105-9919 D-9
113-OR
2
PK
OR
ATCH
LOWER WIPER
4I-5019
A763-GY
B751-YL
113-OR
A761-PU
118-GY
501-GN
200-BK
T
B
365-YL
5
6
MOTOR
323-WH
615-YL
200-BK
575-YL
200-BK
COM
575-YL
578-BU
S1
S2
S3
152-BU
200-BK
200-BK
BK
RD
519-PK
U
122-BU
B786-BU
200-BK 200-BK
B786-BU
308-YL
4
6
1
3
5
2
310-PU
B751-YL
877-YL-8
BK-00
BK-00
615-YL
791-PK
792-OR
152-BU
607-PK
105-BR
321-BR
6
7
8
9
5
4
3
2
1
10
2
7
8
9
5
4
10
6
1
3
B A
RD-00
RD-00
RD-00
RD-00
327-PK-14
615-YL
120-YL
152-BU
118-GY
103-YL
501-GN
500-BR
320-OR
124-GN-14
129-BU
185-YL-14
105-BR
310-PU
112-PU-14
GG
CC
101-RD-14
112-PU-14
112-PU-14
308-YL
B
112-PU-14
112-PU-14
3
2
1
112-PU-14
112-PU-14
788-YL
615-YL
501-GN
118-GY
500-BR
322-GY
113-OR
120-YL
877-YL
A983-BU
792-OR
YY 105-9903 D-9
XX 4I-5447 D-9
791-PK
H
H
BK
A983-BU
V 116-0140 A-10
121-YL
506-PU
B
B
B
101-RD-4
WIPER
RELAY
7Y-5490
CAB/CHASSIS
LAMP RELAY
7Y-5490
MOT
101-RD-6
BAT
G
S
EE
101-RD-14
ENG
SHUTDOWN
RELAY
9X-8124
HEATER
RELAY
085-5353
877-YL
310-PU
RD-00
877-YL
327-PK-14
332-BU
B
B
501-GN
H
H
1
2
B
GOV ACTR -
3
ENG
5I-7579
501-GN
118-GY
EE
506-PU
578-BU
792-OR
310-PU
A768-BU
308-YL
A768-BU
763-BU
A762-PU
509-GN
BK
RD
410-WH
200-BK
BR
GN
A758-BR
508-PU
512-GN
L11L11L11
S4
L17
511-BR
RD-00
BU
B
A
UNLESS OTHERWISE SPECIFIED ALL WIRE IS 16 GAGE.
COMPONENTS ARE SHOWN INSTALLED ON A FULLY
OPERABLE MACHINE WITH THE KEY AND ENGINE OFF.
THIS SCHEMATIC IS FOR THE 315 EXCAVATOR.
GG 105-9918 D-12
FF 105-9917 D-12
200-BK
EE 4I-5429 A-11
DD 7Y-3947 D-9
CC 105-9916 D-12
BB 7Y-3946 D-12
AA 105-9915 D-12
CABLE AS.
A
WIRE AS.
L9
L10
P 7Y-8139 C-6 (NOTE E)
L8
500-BR
V
L2
CAB
CHASSIS
A
4
B965-GY
BK
PLATFORM
B
327-PK-14
B
200-BK
B
YL
ATCH
REFUELING PUMP
6C-5572
A A
E
E
D D
ATCH
REFUELING
PUMP SW
4I-5389
1
2
L
B
B
AAFF
7Y-3918
N 7Y-3994 A-2
D 7Y-8245 F-1
K 4I-5411 E-5
J 7Y-3868 F-3
H 4I-5463 D-4
G 7Y-3922 D-3
F 5I-8216 E-2
E 111-4712 D-2
C 5I-8217 E-2
B964-YL
GY
PU
BR
RED
WHITE
ORANGE
YELLOW
PINK
ABBREV COLOR
BLACK
GRAY
PURPLE
BROWN
DESCRIPTIONSYMBOL
CONNECTOR
ELECTRICAL CONNECTION
TO VEHICLE STRUCTURE
INTERNAL ELECTRICAL
CONNECTION TO SURFACE
OF COMPONENT
BLADE, SPADE, RING,
OR SCREW TERMINAL
BK
PK
YL
OR
WH
RD
GN
BU
GREEN
BLUE
CIRCUIT CONNECTED
CIRCUIT NOT CONNECTED
ATCH WIRE, CABLE,
COMPONENT
L#
CIRCUIT GROUPING
DESIGNATION
IDENT PART NO. LOC
HARNESS AS.
B
B
B
103-YL
B
B
F
EF
A
B
B
B
B
120-YL
A768-BU
A757-GY
L19
F
C
CAB
E
F
F
B
616-BU
616-BU
200-BK
122-BU
PK
109-OR-6
D746-PK
ATCH
BOOM LAMP
5I-8250
BK
A756-BU
A755-PK
BU
B786-BU
120-YL
RD
B956-PK
RD
B955-YL
105-BR
BK
BK
142-BU-14
307-OR
L2
L4
616-BU
615-YL
310-PU
VV
607-PK
309-GY
L1
NOTE A : NORMALLY OPEN BEFORE REFRIGERANT CHARGE.
YY
VV
XX
WW
WW
G
A
576-PK
308-YL
CHASSIS
403-GN
309-GY
OFF
PREHEATBR
D764-GN
OPERATOR STATION OPERATOR STATION
615-YL
L18
325-PK
MOTOR
-
+1
A771-PU
877-YL-8
122-BU
L20
101-RD-14
NOTE B : USE WITH COLD WEATHER.
H
129-BU
L16
122-BU
501-GN
L23
322-GY
325-PK
365-YL
5
6
L10
7
2
519-PK
L2
L8
G
L1
118-GY
B 116-0139 E-12
L6
200-BK-6
200-BK
B789-BR
B790-OR
A770-PK
A763-GY
6
4
3
1
5
2
B790-OR
306-GN
S
321-BR
786-GN
L11
121-YL
B739-WH
B740-OR
L5
B730-OR
60A
7Y-5499
DD
200-BK
A769-GY
115-PK
ENG GOV
ACTR
106-0080
F
B
322-GY
118-GY
A983-BU
ATCH RADIO (NOTE D)
323-WH
491-PK
365-YL
142-BU-14
OPERATOR STATION
1
B737-GN
D746-PK
235-BK
1
616-BU
149-PU
ATCH
CAB LAMP
5I-8250
2
3
4
309-GY
B731-WH
115-PK
124-GN-14
WW 4I-5448 D-9
1
308-YL
C
405-GY
E
491-PK
2
113-OR
109-OR-14
1
184-BU
B737-GN
B731-WH
B730-OR
200-BK
B740-OR
185-YL
B789-BR
4
7
B739-WH
323-WH
DD
786-GN
P
R
R
332-BU
A769-GY
576-PK
A768-BU
B955-YL
307-OR
M 105-9880 B-2
500-BR
ATCH
TRAVEL
ALARM
3T-1444
332-BU
FUEL
SENSOR
105-9993
142-BU-14
102-8041
HORN SW
6I-5088
B964-YL
GLOW
PLUG
DISCONNECT SW
7N-0718
7N-0719 (NOTE B)
792-OR
HORN
7Y-3919
SERVICE
METER
6T-7337
ATCH
CAB LAMP
5I-8250
B790-OR
SAFETY
RELAY
094-2080
A763-GY
B751-YL
B965-GY
D746-PK
D764-GN
B965-GY
B964-YL
B737-GN
A771-PU
A762-PU
788-YL
763-BU
495-GN
200-BK
D746-PK
109-OR-14
491-PK
H
H
309-GY
J
DD
M
N
N
M
309-GY
403-GN
BK-00
615-YL
ATCH
ANTENNA
106-0036
501-GN
HYD OIL
SENDER
4I-5394
109-OR-14
492-GY
492-GY
576-PK
152-BU
235-BK
200-BK-14
575-YL
200-BK
491-PK
405-GY
152-BU
B965-GY
5I-8368
200-BK
B956-PK
152-BU
1
A758-BR
2
403-GN
129-BU
G
200-BK
575-YL
578-BU
D746-PK
495-GN
TRAVEL SPEED
SOL
4I-5674
109-OR-6
AA
152-BU
B790-OR
A769-GY
A768-BU
B789-BR
B789-BR
B789-BR
B790-OR
185-YL
152-BU
B789-BR
B789-BR
B739-WH
B790-OR
B790-OR
B740-OR
+
-
575-YL
576-PK
A769-GY
B730-OR
185-YL
B731-WH
200-BK
184-BU
320-OR
763-BU
ATCH SPEAKER 7Y-5505 (NOTE F)
200-BK
BK-00
101-RD-4
F
E
D
101-RD-14
ATCH SPEAKER 7Y-5505
ATCH
AM/FM RADIO
7Y-5437
C
L11
2
492-GY
E
142-BU-14
322-GY
788-YL
152-BU
A762-PU
235-BK
109-OR-14
A771-PU
ENG
308-YL
102-8041
578-BU
WW
152-BU
A758-BR
308-YL
103-YL
310-PU
2
615-YL
B
L14
L
XX
142-BU
3
4
308-YL
B731-WH
B730-OR
B740-OR
B739-WH
B790-OR
B964-YL
B789-BR
B955-YL
B956-PK
B786-BU
A755-PK
A756-BU
A757-GY
3
4
200-BK
1
2
365-YL
A768-BU
D746-PK
L1
B737-GN
B964-YL
200-BK
118-GY
323-WH
330-YL
L
NOTE F : USE WITH AM/FM RADIO.
L
A983-BU
168-GN
L
200-BK
L
184-BU
332-BU
YY
MAIN
RELAY
3T-0376
8
513-OR
L4
403-GN
MOTOR
L3
112-PU-14
2
1
330-YL
T
9
5
6
ATCH BATTERY
3T-5760 (NOTE B)
3
405-GY
L
GOV ACTR +
2
1
2
L
START RELAY
309-GY
E
B
P
R
ALT
403-GN
2
OPERATOR STATION
A769-GY
1
309-GY
RELAY PANEL
10
200-BK
2
1
607-PK
2
1
A768-BU
P
ALTERNATOR
5I-7982
L
L
A758-BR
616-BU
410-WH
1
112-PU-14
877-YL
L
2
616-BU
B965-GY
200-BK
3
101-RD-6
4
786-GN
BK-00
519-PK
2
1
5
A769-GY
6
306-GN
RELAY PANEL
T
SENDER
5I-7578
7
8
9
5
2
1
10
578-BU
MOTOR
200-BK
495-GN
L7
L6
L5
200-BK
L3
200-BK
L7
L6
L9
L5
PLATFORM
L23L22
ATCH
AM RADIO
7Y-5433
L22
112-PU-14
ATCH
REFUELING SW
5C-6108
A771-PU
200-BK
122-BU
200-BK
SPEAKER (-)
ILLUMI (+)
ACC (+)
BACKUP
GND
124-GN-14
BK-00
SPEAKER (+)
200-BK
103-YL
SPEAKER (+)
SPEAKER (-)
D764-GN
118-GY
200-BK
200-BK
200-BK
200-BK
200-BK
200-BK
200-BK
615-YL
B956-PK
500-BR
B955-YL
501-GN
102-8042
118-GY
B
200-BK
112-PU-14
616-BU
129-BU
113-OR
D764-GN
200-BK
A771-PU
410-WH
A757-GY
575-YL
A756-BU
6
1
2
3
4
5
513-OR
200-BK
112-PU-14
142-BU-14
763-BU
306-GN
A770-PK
A768-BU
D764-GN
B751-YL
L
185-YL
R1
A
B
322-GY
C
R2
ACC
START
ON
2
1
ATCH
105-9465 (NOTE C)
105-9408 (NOTE D)
1
200-BK
1
200-BK
L7
491-PK
1
2
109-OR-6
A757-GY
200-BK
200-BK
A756-BU
576-PK
791-PK
7T-8890
ATCH
7T-8890
2
1
RD-00
121-YL
519-PK
513-OR
1
CHASSIS
265-BK
B789-BR
B739-WH
B790-OR
B740-OR
A763-GY
B751-YL
152-BU
576-PK
2
102-8044
1
2
200-BK
2
607-PK
200-BK
491-PK
763-BU
A769-GY
2
1
HEATER UNIT
4I-4650 (NOTE C)
4I-1275 (NOTE D)
7N-8008
GOV
BACKUP SW
3T-4405
CIGAR
LIGHTER
9W-0335
NEUTRAL
START SW
9W-2150
WIPER
4I-6838
FAULT ALARM
3E-6328
MONITOR
7Y-5500
365-YL
ATCH
BOOM LAMP
5I-8250
A768-BU
ATCH
REFUELING
RELAY
7Y-5490
B964-YL
323-WH
365-YL
ATCH LOWER
WASHER SW
7X-6387
506-PU
129-BU
185-YL-14
615-YL
B965-GY
323-WH
109-OR-6
200-BK
168-GN
321-BR
L1
L2
103-YL
DOME LAMP
096-0721
113-OR
121-YL
152-BU
A761-PU
616-BU
103-YL
120-YL
184-BU
L
607-PK
120-YL
103-YL
114-GN
WW
118-GY
114-GN
D764-GN
TRENCHING SOL
4I-5674
4I-5674
200-BK
200-BK
112-PU-14
GOV ACTR SENSOR21
BOOM RAISE PRESS. SW
506-PU
500-BR
B A
118-GY
6
306-GN
7
8
9
5
4
3
2
1
10
492-GY
200-BK
S 7Y-8105 D-6
R 5I-8376 C-6 (NOTE F)
ZZ 5I-8258 A-5
5I-7580
309-GY
A768-BU
365-YL
L
325-PK
320-OR
322-GY
A763-GY
105-BR
BOOM
LAMP
RELAY
7Y-5490
501-GN
200-BK
323-WH
200-BK
L12
200-BK
10
109-OR-6
877-YL-8
306-GN
B751-YL
L13
A763-GY
A771-PU
500-BR
B790-OR
YL
200-BK
103-YL
122-BU
REFUELING
LOWER WASHER/WIPER
D764-GN
200-BK
501-GN
118-GY
120-YL
L3
403-GN
325-PK
403-GN
403-GN
6
264-BK
403-GN
330-YL
7
200-BK
235-BK
8
9
5
235-BK
GG
BBFF
CCBB
321-BR
200-BK
200-BK
200-BK
200-BK
607-PK
7
200-BK
200-BK
616-BU
322-GY
1
ZZ
410-WH
200-BK
327-PK-14
BK-00
200-BK
403-GN
877-YL-8
327-PK-14
4
109-OR-6
200-BK
BK-00
200-BK-6
A761-PU
200-BK
BATTERY
3T-5760
4
D746-PK
330-YL
A762-PU
101-RD-4
788-YL
309-GY
405-GY
405-GY
B737-GN
K
786-GN
103-YL
506-PU
200-BK
B739-WH
3
NOTE D : USE WITH MODEL X173,X175,X237.
501-GN
309-GY
113-OR
129-BU
101-RD-4
B789-BR
A769-GY
403-GN
306-GN
200-BK
330-YL
200-BK
309-GY
788-YL
B
BK-00
B
2
BK-00
513-OR
D746-PK
403-GN
K
578-BU
403-GN
A761-PU
D746-PK
118-GY
6
109-OR-6
121-YL
B737-GN
513-OR
B740-OR
519-PK
B955-YL
200-BK
200-BK
B956-PK
RD-00
492-GY
578-BU
101-RD-8
118-GY
1
501-GN
877-YL-8
500-BR
2
NEG
POS
1
10
9
7
8
RELAY PANEL
A/C HEATER
10
CIGAR LIGHTER
BACKUP
ALT
BREAKER
9S-0174
FUSE
10A 9W-1442
15A 9W-1441
20A 9W-1446
KEY SW
WASHER/WIPER
TRAVEL ALARM
ENG/PUMP CONT
DOME LAMP
HORN
SOLENOID
MONITOR
RADIO
1
2
3
4
5
9
8
7
BOOM LAMP
6
7
10
9
5
4
3
2
1
HORN
RELAY
7Y-5490
149-PU
6
10A
10A
10A
10A
3
4
101-RD-8
5
10A
10A
10A
20A
CAB/CHASSIS LAMP
10A
10A
15A
CHASSIS
LAMP
5I-8251
10A
607-PK
152-BU
103-YL
320-OR
4
124-GN-14
129-BU
YL
185-YL-14
BU
105-BR
113-OR
3
PU
310-PU
7
6
500-BR
118-GY
615-YL
501-GN
200-BK-6
L19
200-BK-6
200-BK
NOTE C : USE WITH MODEL X174,X176.
B
1
200-BK
200-BK
307-OR
306-GN
BK
B751-YL
A763-GY
200-BK
D746-PK
5
5
200-BK
200-BK
1
HORN
7Y-3920
10A
WASHER
RELAY
7Y-5490
10A
CHASSIS
200-BK
4
3
2
1
SIG
GND
OR 24V+
500-BR
NOTE E : USE WITH AM RADIO.
+
200-BK
M
200-BK
495-GN
2
200-BK-6
3
1
200-BK
200-BK
322-GY
322-GY
200-BK
322-GY
2
1
616-BU
200-BK 200-BK
616-BU
A755-PK
113-OR
A755-PK
410-WH
+
-
403-GN
+BATTERY
DATA -
DATA +
307-OR
A
10A
H
15A
10A
200-BK
200-BK
4
3
SIG
2
1
9
A
6
8
10A
113-OR
5
A 105-9878 D-4
PS VALVE
BACKUP SW
3T-4405
2
1
185-YL
2
200-BK
A762-PU
306-GN
200-BK
L8
320-OR
K
GND
A
P
200-BK
2
1
1
2
B
410-WH
GROUND STRAP
7G-1060
8
A
5V+
2
ATCH LOWER
WIPER SW
7X-6388
9
8
ENG
SHUTDOWN SOL
9
8 7
10
6 4
615-YL
6
KA
5 4
BACKUP
RESISTOR
102-8015
1
F
E
D
3 2
1
C
B
A
CONN 23
CONN 20
CONN 33
CONN
32
CONN 35
CONN 30
CONN 28
CONN 36
CONN 24 CONN 25
CONN 31
CONN 26
CONN 27
CONN 21
CONN 22
CONN 38
CONN 34
CONN 41
ENGINE
SPEED DIAL
STARTER
SWITCH
CONN 57
CONN 16
CONN 43
CONN
12
CONN 13
CONN 14
CONN 49
CONN 48
SPEED
CHANGE SW
CONN 17
CONN 59
CONN 59 CONN 60
CONN 18
CONN 19
CONN 29
CONN 7
CONN 12
CONN 15
CONN 15
CONN 4
CONN 11
CONN 3
CONN 6
CONN 5
TERMINAL
BLOCK
CONN 44
CONN 1
CONN 58
CONN 2
CONN 56
CONN 53
CONN 54
CONN 55
CONN 50
CONN 51
CONN 52
TRAVEL PRESS SW
IMPLEMENT SWING
PRESS SW
BOOM RAISE
PRESS SW
LEVEL SOL
PROPORTIONAL
REDUCING VALVE
CONTROLLER
CONN 45
CONN 39
CONN 37
CONN 42
CONN 46
ENG OIL PRESS SW
SPEED SENSOR
STARTER
MOTOR
A/C COMPR CLUTCH SOL
ENGINE
COOLANT TEMP
WASHER MOTOR
WASHER MOTOR
REFRIGERANT LOW PRESS SW (NOTE A)
CONN 10
CONN 9
CONN 8
(105-9875 CHG 02)
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.
GAUGE CIRCUIT.
CONTROLLER CIRCUIT.
WIPER/WASHER CIRCUIT.
HEATER AND AIR CONDITIONER CIRCUIT.
GROUND CIRCUIT.
ENGINE SHUTDOWN CIRCUIT.
HEATER START AID CIRCUIT.
NEG
POS
NEG
POS
NEG
POS