Isuzu N-Series. Manual - part 1124

8-208 CAB AND CHASSIS ELECTRICAL

Circuit Diagram

H-16

ON

ACC

ST

B

J-5

J-4

H-5

X-2

X-2

X-2

X-2

B-67

B-67

H-5

H-16

J-49

J-49

R-1

R-1

J-65

J-65

B-70

R-6

R-6

J-9

H-7

P-1

P-2

P-3

P-4

P-5

1

2

3

22

1

2

5

6

5

6

7

5

6

3

1

1

3

4

5

12

6

5W(24V)

8W(12V)

0.5G

3W/L

3B/Y

0.5G

0.5G/R

0.5B/Y

0.5B/Y

1.25B

1.25B

1.25B

0.5G/W

1.25B

2B

MAIN

STARTER SWITCH

FRAME

RELAY; HORN

HORN (LH)

FRAME-LH (CENTER)

HORN SWITCH
(COMBINATION SWITCH)

F-16  10A

METER

METER B-51 (8)

(EXCEPT DUMP VEHICLE)

(DUMP VEHICLE)

BACKUP LIGHT

SWITCH

FL-1

KEY SW

FL-2

 (24V MODEL)

H-6

0.5B/Y

0.5R/L

HORN CONTACT

2

BACKUP LIGHT

(REAR COMBINATION LIGHT-RH)

BACKUP LIGHT

(REAR COMBINATION LIGHT-LH)

BACKUP LIGHT

(REAR COMBINATION LIGHT-LH)

(DUMP VEHICLE)

(EXCEPT DUMP VEHICLE)

HORN (RH)

J-62

J-62

5

6

2B

BACKUP LIGHT

(REAR COMBINATION LIGHT-RH)

0.5R/L

2L

P-3

P-4

4JH1

100A or 120A(24V)

100A(12V)

40A(24V)

50A(12V)

F-19

15A; (24V)

F-20

15A; (12V)

HORN, HAZARD

5W

N8A5218E

CAB AND CHASSIS ELECTRICAL 8-209

Connector List

No.

Connector Face

X-2

B-67

B-67

B-70

B-70

E-10

E-10

J-49

005-006

004-001

1

2

3

4

004-002

2
4

1
3

014-002

1 2 3

7 8 9 10

11

4

12

5

13

6

14

014-003

6 5 4

1413 12 11

3 2 1

9 8 7

10

002-025

1 2

002-026

2 1

002-025

1 2

J-49

H-14

H-14

H-16

H-16

J-4

J-5

J-62

No.

Connector Face

002-026

2 1

016-003

1

2

3

4

5

6

7

8

9

11 12 13 14

15

16

10

016-004

4

3

2

1

9

8

7

6

5

13 12 11 10

16

15

14

008-003

1

2

3

4

5

6

7

8

008-004

4

3

2

1

8

7

6

5

001-008

1

001-008

1

006-010

1

2

3

4

5

6

8-210 CAB AND CHASSIS ELECTRICAL

J-62

J-65

J-65

P-1

(12 V)

P-2

P-1

(24 V)

P-4

P-2

(24 V)

No.

Connector Face

006-015

1

2

3

4

5

6

006-010

1

2

3

4

5

6

006-015

1

2

3

4

5

6

000-003

000-004

000-004

000-004

000-006

P-3

P-5

(12 V)

P-5

(24 V)

R-1

R-1

R-6

R-6

No.

Connector Face

000-006

000-007

000-002

006-004

1

2

3

4

5

6

006-005

3

2

1

6

5

4

006-004

1

2

3

4

5

6

006-005

3

2

1

6

5

4

CAB AND CHASSIS ELECTRICAL 8-211

H-5

H-6, H-7

Diagnosis

Quick Chart for Check Point
1. Horn

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

2. Backup Light

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

1

2

3

7

8

9

13

14 15

19

20 21

25

26 27

31

32 33

34

35

36

37

4

5

6

10

11 12

16

17 18

22

23 24

28

29 30

38

39 40

6

5

4

12

11 10

18

17 16

24

23 22

30

29 28

40

39 38

3

2

1

9

8

7

15

14 13

21

20 19

27

26 25

33

32 31

34

35

36

37

N8A5488E

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-19, F-20 

(15 A)

Horn

Horn SW

Horn 
relay

Horn 

contact

Cable 

harness

Trouble
mode

1-1. Horn does not sound

❍

(1)

❍

(4)

❍

(6)

❍

(2)

❍

(5)

❍

(3)

1-2. Horn does not shut off

❍

(2)

❍

(1)

❍

(3)

Check point

Fuse

F-16 (10 A)

Backup light 

SW

(Inhibitor SW)

Backup 

light bulb

Backup 

buzzer

Cable 

harness

Trouble
mode

2-1. Both backup lights inoperative

❍

(1)

❍

(3)

❍

(2)

2-2. Backup light on the left (or right) 
side inoperative

❍

(1)

❍

(2)

2-3. Backup light remains on

❍

(1)