ISUZU TROOPER 1998 Service Repair Manual

8DÐ308 WIRING SYSTEM
Diagnosis
Quick Chart for Check Points
Check pointFuse
C-5 (15A)Wiper &
washer
SWAlarm &
relay
control unitWiper
motorCable
harness
1 Windshield wiper does not operate at
any position Trouble mode
2 Windshield wiper does not operate at
“INT” position
3 Intermittent interval does not change
4 Windshield wiper does not operate at
“LO” position
5 Windshield wiper does not operate at
“HI” position
6 Auto-stop function of the windshield
wiper motor does not operate
7 Rotation of the front wiper motor does
not stop
Washer
motor
8 Windshield washer motor does not
operate

WIRING SYSTEM 8DÐ309
1 Windshield Wiper Does Not Operate At Any Switch Position
REPAIR OR REPLACE THE SWITCH ·IS FUSE C-5 (15A) NORMAL?
YES
·
·
·DISCONNECT THE CONNECTOR OF THE WINDSHIELD WIPER &
WASHER SWITCH
TURN THE STARTER SWITCH ON
IS THERE ANY BATTERY VOLTAGE APPLIED BETWEEN THE
SWITCH HARNESS SIDE CONNECTOR 3 B-52 AND THE
GROUND?REPLACE THE FUSE
NO
YESNO
·IS THE CONTINUITY IN THE WINDSHIELD WIPER & WASHER
SWITCH NORMAL?REPAIR A POOR CONNECTION AT THE
CONNECTORS OR AN OPEN CIRCUIT BETWEEN THE
FUSE C-5 (15A) AND 3 B-52
YESNO
·IS 2 C-39 GROUNDED SECURELY?
YESNO
·
·
·DISCONNECT THE CONNECTOR OF THE WINDSHIELD WIPER MOTOR
WITH THE MOTOR CONNECTOR 2 C-38 CONNECTED TO
THE BATTERY (+) TERMINAL, AND THE CONNECTOR 3 C-38 TO
THE (–) TERMINAL, DOES THE MOTOR ROTATE AT A LOW
SPEED?
AND WITH THE CONNECTOR 1 C-38 CONNECTED TO THE (+)
TERMINAL, DOES THE MOTOR ROTATE AT A HIGH SPEED?GROUND IT SECURELY
REPAIR A POOR CONNECTION AT THE CONNECTORS OR AN OPEN
CIRCUIT BETWEEN 3 C-38 AND THE GROUNDREPAIR OR REPLACE THE WINDSHIELD WIPER MOTOR
YESNO

8DÐ310 WIRING SYSTEM
2 Windshield Wiper Does Not Operate At ÒINTÓ Position
·
·
·DISCONNECT THE CONNECTORS OF THE WINDSHIELD WIPER &
WASHER SWITCH
SET THE SWITCH AT THE “INT” POSITION
IS THERE CONTINUITY BETWEEN THE SWITCH CONNECTOR
TERMINALS 3 B-52 AND 2 B-52 ?
YESNO
·
·
·DISCONNECT THE CONNECTOR OF THE ALARM & RELAY
CONTROL UNIT
SET THE WINDSHIELD WIPER & WASHER SWITCH AT THE "INT"
POSITION AND TURN THE STARTER SWITCH ON
IS THE BATTERY VOLTAGE APPLIED BETWEEN 20 B-7 AND
THE GROUND?REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 14 B-52 AND B-19
YESNO
·IS B-19 GROUNDED SECURELY?REPAIR OR REPLACE THE WINDSHIELD WIPER &
WASHER SWITCH
YESNO
GROUND IT SECURELY ·IS THERE CONTINUITY BETWEEN THE WINDSHIELD WIPER &
WASHER SWITCH HARNESS SIDE CONNECTOR TERMINALS
14 B-52 AND THE GROUND?
YESNO
REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 2 B-52 AND 20 B-7·IS THERE CONTINUITY BETWEEN 14 B-6 AND 8 B-52 ?
YESNO
REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 14 B-6 AND
8 B-52 REPLACE THE ALARM & RELAY CONTROL UNIT

WIRING SYSTEM 8DÐ311
3 Intermittent Interval Does Not Change
·
·DISCONNECT THE CONNECTOR OF THE WINDSHIELD
WIPER & WASHER SWITCH
WHEN THE INTERMITTENT KNOB IS TURNED, DOES THE
RESISTANCE VALUE BETWEEN THE SWITCH CONNECTOR
TERMINALS 8 B-52 AND 14 B-52 VARY BETWEEN 0W- 2 KW?
YESNO
REPAIR OR REPLACE THE SWITCH
IS THERE SHORT CIRCUIT BETWEEN 14 B-6 AND 8 B-52 ?·
YESNO
REPAIR A SHORT CIRCUIT REPLACE THE ALARM & RELAY
CONTROL UNIT
4 Windshield Wiper Does Not Operate At ÒLOÓ Position
·
·
·DISCONNECT THE CONNECTORS OF THE WINDSHIELD WIPER &
WASHER SWITCH
TURN THE STARTER SWITCH ON
SHORT CIRCUIT THE WINDSHIELD WIPER & WASHER SWITCH HAR-
NESS SIDE CONNECTOR TERMINALS 3 B-52 - 5 B-52 AND
CHECK TO SEE IF THE WINDSHIELD WIPER MOTOR ROTATES AT A
LOW SPEED.
REPAIR OR REPLACE THE WIPER & WASHER SWITCH

8DÐ312 WIRING SYSTEM
5 Windshield Wiper Does Not Operate At ÒHIÓ Position
·
·DISCONNECT THE CONNECTOR OF THE WINDSHIELD WIPER &
WASHER SWITCH
WITH THE SWITCH SET AT “HI” POSITION, IS THERE
CONTINUITY BETWEEN THE SWITCH CONNECTOR TERMINALS
3 B-52 AND 4 B-52 ?
YESNO
·
·
·DISCONNECT THE CONNECTOR OF THE WINDSHIELD WIPER
MOTOR
CONNECT THE MOTOR CONNECTOR 1 C-38 TO THE BATTERY
(+) TERMINAL, AND 3 C-38 TO THE BATTERY (–) TERMINAL
DOES THE MOTOR ROTATE AT A HIGH SPEED?REPAIR OR REPLACE THE WINDSHIELD WIPER &
WASHER SWITCH
YESNO
REPAIR A POOR CONNECTION AT THE CONNECTORS OR AN
OPEN CIRCUIT BETWEEN 4 B-52 AND 1 C-38REPAIR OR REPLACE THE WINDSHIELD WIPER
MOTOR

WIRING SYSTEM 8DÐ313
6 Auto-Stop Function of The Windshield Wiper Motor Does Not Operate
·
·DISCONNECT THE CONNECTOR OF THE WINDSHIELD WIPER &
WASHER SWITCH
WITH THE SWITCH SET AT “OFF” POSITION, IS THERE
CONTINUITY BETWEEN THE SWITCH CONNECTOR TERMI-
NALS 5 B-52 AND 6 B-52 ?
YESNO
·
·
·DISCONNECT THE CONNECTOR OF THE WINDSHIELD WIPER
MOTOR
CONNECT THE MOTOR CONNECTOR 2 C-38 TO THE BATTERY
(+) TERMINAL AND 3 C-38 TO THE (–) TERMINAL, AND THEN
CHANGE THE CONNECTION OF THE BATTERY (+) TERMINAL
TO THE CONNECTOR 6 C-38 WHILE THE MOTOR ROTATING
AT A LOW SPEED
WHEN CONNECTING THE CONNECTOR TERMINALS 2 C-38 AND
5 C-38 IN THIS CONDITION, DOES THE MOTOR STOP AT AUTO-
STOP POSITION?REPAIR OR REPLACE THE WINDSHIELD WIPER &
WASHER SWITCH
REPLACE THE ALARM & RELAY CONTROL UNIT REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 5 C-38 AND
12 B-7
YESNO
YESNO
·
·TURN THE STARTER SWITCH ON
IS THERE ANY BATTERY VOLTAGE APPLIED BETWEEN THE
WINDSHIELD WIPER MOTOR HARNESS SIDE CONNECTOR
TERMINAL 6 C-38 AND GROUND?REPAIR OR REPLACE THE WINDSHIELD WIPER MOTOR
YESNO
·
·DISCONNECT THE CONNECTOR OF THE ALARM & RELAY
CONTROL UNIT
IS THERE CONTINUITY BETWEEN THE HARNESS SIDE
CONNECTOR 12 B-7 AND THE WINDSHIELD WIPER MOTOR
HARNESS SIDE CONNECTOR 5 C-38 ?REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN THE FUSE C-5 (15A)
AND 6 C-38

8DÐ314 WIRING SYSTEM
7 Rotation of The Windshield Wiper Motor Does Not Stop
·IS THE CONTINUITY IN THE WINDSHIELD WIPER & WASHER
SWITCH NORMAL?
YESNO
REPAIR OR REPLACE THE WINDSHIELD WIPER &
WASHER SWITCHREPAIR OR REPLACE THE WINDSHIELD WIPER
MOTOR

WIRING SYSTEM 8DÐ315
8 Windshield Washer Motor Does Not Operate
·IS FUSE C-5 (15A) NORMAL?
YES
·
·DISCONNECT THE CONNECTOR OF THE WINDSHIELD WIPER &
WASHER SWITCH
WITH THE WASHER BUTTON DEPRESSED, IS THERE
CONTINUITY BETWEEN THE SWITCH SIDE CONNECTOR
TERMINALS 1 B-52 AND 7 B-52 ? REPLACE FUSE C-5 (15A)
NO
YESNO
·
·TURN THE STARTER SWITCH ON
IS THE BATTERY VOLTAGE APPLIED BETWEEN THE WIND-
SHIELD WIPER & WASHER SWITCH HARNESS SIDE CONNECTOR
TERMINAL 1 B-52 AND THE GROUND?REPAIR OR REPLACE THE WINDSHIELD WIPER &
WASHER SWITCH
REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN FUSE C-5 (15A) AND
1 B-52
YESNO
DISCONNECT THE CONNECTOR OF THE WINDSHIELD WIPER
WASHER MOTOR
TURN THE STARTER SWITCH ON
WITH THE WASHER BUTTON OF THE WINDSHIELD WIPER &
WASHER SWITCH DEPRESSED, IS THE BATTERY VOLTAGE
APPLIED BETWEEN THE WASHER MOTOR HARNESS SIDE
CONNECTOR TERMINAL 1 C-35 AND THE GROUND? ·
·
·
REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 7 B-52 AND
1 C-35
YESNO
IS 4 I-39 GROUNDED SECURELY? ·
GROUND IT SECURELY
YESNO
CONNECT THE MOTOR SIDE CONNECTOR 1 C-35 OF THE WIND-
SHIELD WASHER MOTOR TO THE BATTERY (+) TERMINAL, AND
THE CONNECTOR 2 C-35 TO THE (–) TERMINAL
DOES THE MOTOR ROTATE? ·
·
REPLACE THE WINDSHIELD WASHER MOTOR
YESNO
REPAIR A POOR CONNECTION AT THE CONNECTORS OR
AN OPEN CIRCUIT BETWEEN 2 C-35 AND THE GROUND

8DÐ316 WIRING SYSTEM
Rear Wiper/Washer
General Description
The circuit consists of rear wiper/washer switch,
alarm & relay control unit, rear wiper motor and rear
washer motor.
When rear wiper switch on rear wiper/washer
switch is depressed, battery voltage is applied to
rear wiper motor through alarm & relay control unit
and activates rear wiper motor.
When rear washer switch on rear wiper/washer
switch is depressed, battery voltage is applied to
rear washer motor and activates rear washer motor.
At the same time, the current as an input signal for
activating rear wiper motor flows to alarm & relay
control unit, then alarm & relay control unit
activates rear wiper motor to wipe glass cleaning
fluid.

WIRING SYSTEM 8DÐ317
Circuit Diagram (RHD)-1
ALARM & RELAY
CONTROL UNITRR WIPER/
WASHER SW
B-2
BODY-LH
A
B
4
B-77
I-16
8
B-7
B-7
2.0
B 0.85
B 0.5
L/B0.5
L/B0.5
L/B 0.5
L/B3.0
B/R
C-6 10A
RR WIPER&WASHER
9
B-18
BODY-RH2.0
B
B-7 AUTO STOP
0.5
LG/L2
CB-7 MOTORH-25
3 314
I-16H-16
I-16
0.5
LG/R0.5
LB
0.5
LG/W 0.5
LB
D 0.5
LG/W0.5
LG/W0.3
R/G 0.85
G/R
3 STARTER SW
(IG2)
ILLUMINATION
CONTROLLER(3)TAIL RELAY
(4)
I-16
I-16
18
B-7
WASHER WIPER22H-2511 862
H-26
RR
WASHER RR
WIPER
D08RW643