Isuzu N-Series. Service manual — part 1038
CAB AND CHASSIS ELECTRICAL 8-257
1-7. Windshield Washer Motor Does Not Operate
NO
NO
NO
NO
NO
• TURN THE STARTER SWITCH ON
• IS THE BATTERY VOLTAGE APPLIED BETWEEN THE
WINDSHIELD WIPER & WASHER SWITCH HARNESS
SIDE CONNECTOR TERMINAL 1 B-69 AND THE
GROUND?
• DISCONNECT THE CONNECTOR OF THE WINDSHIELD
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 B-8
AND THE GROUND?
• IS B-7 GROUNDED SECURELY?
• CONNECT THE MOTOR SIDE CONNECTOR 1 B-8 OF
THE WINDSHIELD WASHER MOTOR TO THE BATTERY
(+) TERMINAL, AND THE CONNECTOR 2 B-8 TO THE (-)
TERMINAL
• DOES THE MOTOR ROTATE?
REPAIR A POOR CONNECTION AT THE CONNECTORS OR
AN OPEN CIRCUIT BETWEEN 2 B-8 AND B-7
REPAIR OR REPLACE THE WINDSHIELD WIPER &
WASHER SWITCH
REPAIR A POOR CONNECTION AT THE
CONNECTORS OR AN OPEN CIRCUIT BETWEEN
FUSE F-10 (15A) AND 1 B-69
REPAIR A POOR CONNECTION AT THE
CONNECTORS OR AN OPEN CIRCUIT BETWEEN 1
B-8 AND 6 B-69
GROUND IT SECURELY
REPAIR OR REPLACE THE WINDSHIELD WASHER
MOTOR
YES
YES
YES
YES
YES
• IS CONTINUITY IN THE WINDSHIELD WIPER & WASHER
SWITCH NORMAL?
N8A0260E
8-258 CAB AND CHASSIS ELECTRICAL
Starter Switch
Refer to “START AND CHARGING” in this section.
Windshield Wiper & Washer Switch
With the starter switch on, the windshield wiper and
washer switch controls the start and stop operation as
well as the change of operating speeds.
Both the windshield washer motor and the wiper
motor jointly operate while the washer button is
pushed.
Inspection
Check the continuity between the connector terminals of the switch.
Repair or replace the switch when the result of inspection is found abnormal.
Removal and Inspection
Refer to “HEADLIGHT, FOG LIGHT AND CORNERING
LIGHT” in this section.
N8A0261E
Terminal No.
Washer SW
Wiper SW
3
7
1
4
8
6
OFF
OFF
INT
LO
HI
ON
MIST,OFF
INT,LO,HI
B-69
Switch side
1
5
2
6
3
7
4
8
N8A0262E
CAB AND CHASSIS ELECTRICAL 8-259
Windshield Wiper Motor
Inspection
1. Operation in low speed
With the motor connector terminal 2
connect-
ed to the battery (+) terminal and the connector 1
to the (
−) terminal, check to see if the motor
rotates in low speed.
2. Operation in high speed
With the motor connector terminal 3
connect-
ed to the battery (+) terminal and the connector 1
to the (
−) terminal, check to see if the motor
rotates in low speed.
3. Stop operation
After stopping the windshield wiper in the position
on the way by confirming the operation at the low
speed in item No. 1.
When the connectors 2
and 5
are con-
nected, while connecting the motor connector ter-
minal 4
to the battery (+) terminal, check to
see, if the motor rotates at low speed and stops at
the auto-stop position.
Repair or replace the motor when the results of the
above inspections are found abnormal.
Removal
Preparation:
Disconnect the battery ground cable.
1. Glove Box
Refer to “INSTRUMENT PANEL” of section 2.
2. Windshield Wiper Motor
1) Disconnect the connector.
2) Remove four screws.
3) Remove the ball joint between crank arm and
wiper link.
Installation
To install, follow the removal steps in the reverse order,
noting the following points.
• Windshield Wiper Motor
When the crank arm is removed from the wind-
shield wiper motor, tighten the motor shaft nut with
the specified torque.
Tighten:
Shaft nut to 17 N
⋅m (170 kg⋅cm/147 lb⋅in)
• Temporarily fit the motor by using one of the four
wiper motor fixing screws.
• Put the crank arm ball joint in the wiper link hole
and fix them together while pulling the wiper link.
N8A0263E
B-11
B-11
B-11
B-11
B-11
B-11
B-11
N8A0264E
8-260 CAB AND CHASSIS ELECTRICAL
Windshield Washer Motor
Inspection
With the battery (+) terminal connected to the washer
motor connector terminal 1
and the (
−) terminal to
the connector 2
, check to see if the cleaning fluid
pushes out.
Replace the tank/motor when the result of inspection is
found abnormal.
Removal
Preparation:
Disconnect the battery ground cable.
1. Instrument Panel Under Cover
Refer to “INSTRUMENT PANEL” of section 2.
2. Washer Tank
1) Disconnect the washer motor connector.
2) Disconnect the washer hose.
3) Remove three fixing screws.
3. Clip Band
4. Windshield Washer Motor
Hold the motor and pull it out from the washer tank.
Installation
To install, follow the removal steps in the reverse order.
B-8
B-8
1
2
B-8
N8A0265E
3
4
2
1
N8A0266E
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