Isuzu N-Series. Manual - part 1137

8-260 CAB AND CHASSIS ELECTRICAL

Connector List

No.

Connector Face

B-8

B-9

B-11

B-11

B-67

B-67

B-69

B-69

002-009

1

2

008-012

1

2

3

4

5

6

7

8

006-001

1

2

3

4

5

6

006-016

3
6

2
5

1
4

004-001

1

2

3

4

004-002

2
4

1
3

008-001

1
5

2
6

3
7

4
8

008-002

1
5

2

3

6

7

4

8

P-1

(12V)

P-2

P-1

(24V)

P-4

P-2

(24V)

P-3

P-5

(12V)

P-5

(24V)

No.

Connector Face

000-003

000-004

000-004

000-004

000-006

000-006

000-007

000-002

CAB AND CHASSIS ELECTRICAL 8-261

H-7

Diagnosis

Quick Chart for Check Point
1. Windshield Wiper and Washer

Notice:
Figure in parenthesis “( )” indicates the order of inspection.

X-11

X-1

No.

Connector Face

005-006

005-006

1

2

1

2

1 2 3 4

5 6 7 8

9 10 11 12 13

14 15 16 17 18

2

1

2

1

4 3 2 1

8 7 6 5

13 12 11 10 9

18 17 16 15 14

H - 6

H - 7

H - 8

N8A5489E

Check point

Fuse

F-10

(15A)

Wiper& 
washer

SW

Intermit-

tent relay

Wiper 

motor

Washer 

motor

Cable 

harness

Trouble 

mode

1. Windshield wiper does not op-

erate at any switch position

❍

(1)

❍

(3)

❍

(4)

❍

(2)

2. Windshield wiper does not op-

erate at “INT” position

❍

(1)

❍

(3)

❍

(2)

3. Windshield wiper does not op-

erate at “LO” position

❍

(1)

❍

(3)

❍

(2)

4. Windshield wiper does not op-

erate at “HI” position

❍

(1)

❍

(2)

❍

(3)

5. Auto-stop function of the 

windshield wiper motor does 
not operate

❍

(1)

❍

(4)

❍

(2)

❍

(3)

6. Rotation of the windshield 

wiper motor does not stop

❍

(1)

❍

(2)

7. Windshield washer motor 

does not operate

❍

(1)

❍

(3)

❍

(2)

8-262 CAB AND CHASSIS ELECTRICAL

1. Windshield Wiper and Washer
1-1. Windshield Wiper Does Not Operate at Any Switch Position

• IS FUSE  F-10  (15A) NORMAL?

NO

• DISCONNECT THE CONNECTOR OF THE WINDSHIELD

WIPER & WASHER SWITCH

• TURN THE STARTER SWITCH ON

• IS THE BATTERY VOLTAGE APPLIED BETWEEN THE

SWITCH HARNESS SIDE CONNECTOR 1  B-69  AND THE
GROUND?

REPLACE THE FUSE

• DISCONNECT THE CONNECTOR OF THE WINDSHIELD

WIPER MOTOR WITH THE MOTOR CONNECTOR 2  B-11
CONNECTED TO THE BATTERY (+) TERMINAL, AND THE
CONNECTOR 1  B-11  TO THE (-) TERMINAL, DOES THE
MOTOR ROTATE AT A LOW SPEED?

• AND WITH THE CONNECTOR 3  B-11  CONNECTED TO

THE (+) TERMINAL, DOES THE MOTOR ROTATE AT A
HIGH SPEED?

GROUND IT SECURELY

YES

NO

• IS CONTINUITY IN THE WINDSHIELD WIPER & WASHER

SWITCH NORMAL?

REPAIR A POOR CONNECTION AT THE
CONNECTORS OR AN OPEN CIRCUIT BETWEEN
THE FUSE  F-10  (15A) AND 1  B-69  

YES

NO

• IS  B-7  GROUNDED SECURELY?

REPAIR OR REPLACE THE SWITCH

YES

NO

YES

NO

REPAIR A POOR CONNECTION AT THE CONNECTORS OR
AN OPEN CIRCUIT BETWEEN 1  B-11  AND  B-7

REPAIR OR REPLACE THE WINDSHIELD WIPER
MOTOR

YES

N8A0254E

CAB AND CHASSIS ELECTRICAL 8-263

1-2. Windshield Wiper Does Not Operate at “INT” Position

1-3. Windshield Wiper Does Not Operate at “LO” Position

NO

• DISCONNECT THE CONNECTOR OF THE

INTERMITTENT RELAY

• IS THERE CONTINUITY BETWEEN THE RELAY AND

THE WINDSHIELD WIPER & WASHER SWITCH
HARNESS SIDE CONNECTOR 6  B-9  AND 8  B-69  ,
OR 3  B-9  AND 3  B-69  RESPECTIVELY?

REPAIR OR REPLACE WINDSHIELD WIPER &
WASHER SWITCH

YES

NO

REPLACE THE INTERMITTENT RELAY

REPAIR A POOR CONNECTION OR AN OPEN
CIRCUIT BETWEEN THE CIRCUITS

YES

• IS CONTINUITY IN THE WINDSHIELD WIPER &

WASHER SWITCH NORMAL?

N8A0255E

NO

• DISCONNECT THE WINDSHIELD WIPER MOTOR

CONNECTOR

• CONNECT THE BATTERY (+) TERMINAL TO THE

WINDSHIELD WIPER MOTOR CONNECTOR 2  B-11   AND
THE (-) TERMINAL TO 1  B-11  

• DOES THE MOTOR ROTATE AT A LOW SPEED?

REPAIR OR REPLACE THE WINDSHIELD WIPER &
WASHER SWITCH

YES

NO

REPAIR A POOR CONNECTION AT THE CONNECTORS OR
AN OPEN CIRCUIT BETWEEN THE CONNECTORS 7  B-69
AND 2  B-11  

REPAIR OR REPLACE THE WINDSHIELD WIPER
MOTOR

YES

• IS CONTINUITY IN THE WINDSHIELD WIPER & WASHER

SWITCH NORMAL?

N8A0256E