wipers ISUZU TROOPER 1998 Service Repair Manual

WIRING SYSTEM 8DÐ303
Windshield Wiper/Washer
General Description
The circuit consists of windshield wiper/washer
switch, windshield wiper motor, windshield washer
motor and alarm & relay control unit.
When windshield wiper/washer switch is turned on
with starter switch on, battery voltage is applied to
windshield wiper motor to activate wipers.
When windshield washer switch is turned on with
starter switch on, battery voltage is applied to
windshield washer motor.
Windshield washer motor squirts glass cleaning
fluid while windshield washer switch is pushed and
at the same time, alarm & relay control unit activates
windshield wiper motor to wipe glass cleaning fluid
at low speed.

8D – 336 WIRING SYSTEM
Diagnosis
Quick Chart for Check Points
1. Headlight wipers and washer do not
operate on either side
2. Wiper on the left (or right) side does
not operate
3. Auto-stop function of the wiper on the
left (or right) side does not operate
4. Wiper on the left (or right) side does
not stop
5. Washer motor does not operate
Trouble modeCheck point
C-7 C-4Fuse
Headlight
wiper SWHeadlight
wiper
motorHeadlight
washer
motorCable
harness Alarm &
relay
control unit

WIRING SYSTEM 8D – 337
1. Headlight Wipers And Washer Do Not Operate On Either Side
•IS FUSE C-7 (10A) NORMAL?
YES
REPLACE THE FUSE C-7 (10A)
NO
•TURN THE STARTER SWITCH ON
•IS THE BATTERY VOLTAGE APPLIED BETWEEN
FUSE C-7 AND HEADLIGHT WIPER MOTOR
CONNECTOR TERMINAL 6 AND THE GROUND?
YESNO
•IS B-19 GROUNDED SECURELY?REPAIR A POOR CONNECTION AT THE
CONNECTORS OR AN OPEN CIRCUIT
BETWEEN FUSE C-7 AND HEADLIGHT
WIPER MOTOR
YES
GROUND IT SECURELY
NO
•DISCONNECT THE HEADLIGHT WIPER
SWITCH CONNECTOR
•IS THE CONTINUITY IN THE SWITCH
NORMAL?
YESNO
REPAIR OR REPLACE THE HEADLIGHT
WIPER SW REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 6 I-4 AND B-19