235 ELECTRICAL SCHEMATIC

SENR2116-01
June 1984
235 Excavator and Front Shovel
Electrical System
32K2679-3577
81X404-500
Excluding:
32K2732-2733
©
1984 Caterpillar
All Rights Reserved
Printed in U.S.A.
DOUBLE RIGHT
HAND AUX
CONTROL SW
(ON RH CONTROL
LEVER)
DOUBLE LEFT
HAND AUX
CONTROL SW
(ON LH CONTROL LEVER)
CONSOLE
HARNESS AS
AUXILIARY
HYDRAULIC
RELAY
GROUND AT
GOVERNOR CONTROL BRACKET
PU/Y
PU/Y
PU/Y
PU/Y
PU/Y
T/R
T/R
PU/Y
T/R
W/Y
O/B
HYDRAULIC OIL
PRESSURE SWITCH
CONTROL GROUP - GRAPPLE
W/Y
O/B
R
R
R
R
R
R
R
PU/Y
B
GRAPPLE
OPEN CLOSE
CLOCKWISE
COUNTER
CLOCKWISE
ROTATOR
DIODE ASSEMBLY
R
R
BL
BL
PU/Y
PU/Y PU/Y
T/R T/R
T/R
O/B
O/B
O/B
W/Y W/Y
W/Y
O/B
W/Y
O/B
PU/Y
T/R
B
B B B
PU/Y
W/Y
W/Y
B
W/Y
R
R
R
R
W/Y
D65638
K
B
H
L
C
G
D
F
E
R/B
B/Y
R/W
AIR FILTER
B
GROUND
W/DK GR
HYD OIL LEVEL
O/LT BL
W/PU
R/O
B/LT BL
B/R
LT GR/T
HYD OIL FILTER
T/W
CIRCUIT BOARD
LEFT
FRONT
FLOOD
LAMP
DK GR
CIRCULATING
FAN MOTOR
CAB
DOME
LAMP
CONSOLE
LAMP
P
DK GR
B
B
RH AUX
CONTROL
SWITCH
PU/Y
PU/Y
R
R
R
R
START
AID
SWITCH
CIGAR
LIGHTER
PU/Y
GROUND AT
GOVERNOR
CONTROL
BRACKET
B
B
B
R
Y/B
HIGH
LOW
PU/O
PU/O
LT GR/B
RIGHT FRONT
FLOOD LAMP
DK GR
AIR CONDITIONER
EVAPORATOR
RELAY
B
O/W
R
O/W
R/B
W/B
R
R
R/B
W/B
DK GR
TO CHASSIS
PU/Y
W/Y
PU/Y
W/Y
LT BL
B
Y/B
Y/B
PU
W
PU/P
PU
W
R/W
O
W/DK GR
T/W
W/B
A
B
C
D
PU/P
A
B
C
D
LT BL/B
Y
Y/B
T
P
LT GR
R/B
GY
R
R/P
LT GR
GY
Y/B
R
Y
T
P
R/B
R/P
R/P
T
WINDSHIELD
WASHER
SWITCH
WINDSHIELD
WIPER
SWITCH
DEFROSTER
SWITCH
HEATER
SWITCH
BOOM AND
FRONT LIGHTS
SWITCH
WARNING
SYSTEM
CHECK
SWITCH
HIGH
LOW
LOW
HIGH
PARK
HIGH
LOW
W/B
DK GR
Y/B
PU/O
R
B
LT
GR/BR
B/Y
B/Y
BR
Y
Y
Y/B
PU/O
P
T
DK
GR
B
R
T
T
DK GR
W/ B
LT GR
R
O
HORN
SWITCH
FRONT
HORN
TRAVEL
ALARM SWITCH
TIMER
ASSEMBLY
HYDRAULIC
OIL PRESSURE
SWITCH
N.O.
LT AUX
CONTROL
SWITCH
START
SWITCH
B
GY
R
B
LT BL
LT BL
B
B
B
B
B
B/R
B/R
B/RB/R
LT BL/B
B/W
B
R
BW
R
LT BL/B
R
B
W/Y
R
R
W
PU/P
PU/P
W
R
R
W/Y
START
W/Y
R
LT BL/B
BR
B/LT BL
O
O
O
O
O
O
O
O
ENG
OIL
PRESS
ENG
COOLANT
TEMP
VOLT
METER
AIR
FILTER
IND
HYDRAULIC
OIL
FILTER
IND
DISCONNECT
SWITCH
GROUND AT
FRAME
GROUND AT
PLATFORM
R(DEFR)
R(WIPER)
DK GR
B
WINDSHIELD
WIPER
MOTOR
DEFROSTER
MOTOR
HIGH
HIGH
LOW
LOW
PARK
DK GRN DK GRN
R R R
R R R
DK GRN
B B B
O O O
B
B
LT GR/T
LT BL
BR BR
BY BY
GY
R/TR/T
R/B
R/B
B
R/T
DK GRN
P
P
W/Y
R
R
P
P
DK GRN
O
PU
B
A
B
I
L
J
K
H
G
F
C
D
E
J
R/T
PU
R/T
R/T
HEATER
B
P
P
P
LT GN/B
PU/O
DK GR
BR
I
R/W
W/PU
B
B
Y/B
TO CAB
- BATTERIES +
2-12 VOLT
B
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
HYDRAULIC OIL
LOW LEVEL SWITCH
N.O.
RIGHT
CONTROL
LEFT
CONTROL
ACTUATOR SOLENOIDS
FOR ROTATING CLAM OR
BOTTOM DUMP BUCKET
CIRCUIT
BREAKER
(SEE LEGEND)
STARTER
RELAY
STARTER
ENGINE OIL
PRESSURE
SWITCH
N.O.
AIR FILTER
SWITCH
N.C.
REAR
HORN
STARTING AID
TEMPERATURE
SWITCH
N.C.
ETHER AID
SOLENOID
ALTERNATOR
AIR CONDITIONER
COMPRESSOR
ELECTRICAL SCHEMATIC
ABBREV. COLOR SYMBOL DESCRIPTION
HYDRAULIC OIL
TEMPERATURE
COMPENSATOR
SWITCH
N.C.
W/DK GR
HYDRAULIC
OIL FILTER
SWITCH
N.C.
BOOM LAMPS
FRONT LAMPS
WIPER/WASH
DEFROSTER
WARNING CIRCUIT
HORN/LIGHTER
ELEC CONT/START SW
WARNING FLASHER
AIR CONDITIONER
TRAVEL
ALARM
BOOM LAMPS
AIR CONDITIONER
CONDENSER
WINDSHIELD WASHER
PUMP MOTOR
HEATER/DOME
N.O.
N.C.
NORMALLY OPEN
NORMALLY CLOSED
LT BL
R/W
R/W
R/W
B
B
W
W
W
Y/B
Y/B
PU
PU
PU
R
W/BW/B B
R
G
Y/B
Y/B
R/W
PU
GY
R
R/B
LT GR
P
T
Y/B
Y
B
B
R/W
O
A
B
C
D
W/DK GR
T/W
PU
W
LT BL
T/W
GY
LT GR
Y/B
Y
T
R/B
P
A
B
C
D
PU
W
R/P
B
W/B
W/B
W/B
W/B
W/B
R
R/B
W/B
PU/Y
W/Y
R/B
PU/Y
W/Y
B
C
D
A
R R
T/W
D
B
A
C
W/B
20
15
3MDX
5
5
5
15
10
5
30
D65637