Isuzu N-Series. 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