Isuzu N-Series. Manual - part 1036

CAB AND CHASSIS ELECTRICAL 8-249

Circuit Diagram

B-11

B-11

B-11

B-11

B-11

B-69

B-69

B-69

B-69

B-69

B-69

B-9

B-9

B-9

B-9

B-9

B-9

B-8

B-8

B-7

B

ST

ACC

ON

B-67

B-67

P-1

P-2

P-3

P-4

P-5

 (24V MODEL)

 (12V)

2

3

8

3

6

7

4

2

B

PS

I

PM

W

E

B

P

4

5

2

3

LO

HI

1

3

8

7

4

6

1

P

OFF

I

H

W

L

1

2

HEADLIGHT BRACKET (LH)

3B

0.5B

0.5B(24V)

1.25B(12V)

0.5L/B

0.5BR/Y(24V)

0.85BR/Y(12V)

0.5L(24V)

1.25L(12V)

0.5L/B

0.5L/O(24V)

0.85L/O(12V)

0.5L/R(24V)

0.85L/R(12V)

0.5BR/W(24V)

0.85BR/W(12V)

0.5BR/R(24V)

1.25BR/R(12V)

WIPER, WASHER SW
(COMBINATION SW)

0.5L(24V)

0.85L(12V)

0.5L(24V)

1.25L(12V)

0.5L(24V)

3L

1.25L(12V)

3B/Y

3W/L

FL-1 60A or 100A(24V)

80A(12V)

MAIN

FL-2 40A(24V)

50A(12V)

KEY SW

STARTER SW

F-10  15A

WIPER, WASHER

WIPER MOTOR

WASHER MOTOR

0.5B

H-7

3W/B

1

RELAY; INTERMITTENT

FRAME

2L

P-3

P-4

4JH1

FUSE BLOCK

X-1

X-1

X-1

X-1

RELAY
TAIL ON

 (24V)

X-11

X-11

X-11

X-11

RELAY
TAIL ON

0.5B

3W/L

5

2

3

1

5

2

3

1

N8A0252E

8-250 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 8-251

H-7

Diagnosis

Quick Chart for Check Point
1. Windshield Wiper and Washer

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

X-1

X-11

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

Intermitt

ent 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)

8-252 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