Isuzu N-Series. Manual - part 1023

CAB AND CHASSIS ELECTRICAL 8-197

Horn, Backup Light and Backup Buzzer

General Description

The circuit consists of the starter switch, horn, horn switch, backup light (Rear combination light), backup light switch,
back buzzer and the relay.
When the horn switch is turned on independent of the position of the starter switch, the relay is activated to sound the
horn. When the backup light switch turns on with the starter switch on, the backup light will operate.
Backup Light and Backup Buzzer Circuit

N8A5216E

8-198 CAB AND CHASSIS ELECTRICAL

Parts Location

X-2

J-49 (55, 69)

F-16, F-19, F-20

N8A0184E

CAB AND CHASSIS ELECTRICAL 8-199

Circuit Diagram

ON

ACC

ST

B

J-5

J-4

H-5

X-2

X-2

X-2

X-2

B-67

B-67

H-5

J-49

J-49

R-1

R-1

B-70

R-6

J-9

H-7

P-1

P-2

P-3

P-4

P-5

1

H-16

7

2

3

22

1

2

5

6

5

6

3

1

1

3

4

5

12

5W(24V)

8W(12V)

0.5G

3W/L

3B/Y

0.5G

0.5G/R

0.5B/Y

0.5B/Y

0.5R/L

1.25B

1.25B

0.5G/W

1.25B

2B

MAIN

STARTER SW

F-19

15A :4JH1, 4JB1, 4JB1-TC

F-20

15A :24V, 4HG1-T(12V)

HORN, HAZARD

FRAME

RELAY; HORN

HORN (LH)

FRAME-LH (CENTER)

HORN SW
(COMBINATION SW)

F-16  10A

METER

METER B-51 (8)

BACKUP LIGHT

SW

FL-1

100A or 120A(24V)

100A(12V)

KEY SW

FL-2

40A(24V)

50A(12V)

 (24V MODEL)

H-6

5W

0.5R/L

HORN CONTACT

(EXCEPT DUMP VEHICLE)

2

BACKUP LIGHT

(REAR COMBINATION LIGHT-RH)

BACKUP LIGHT

(REAR COMBINATION LIGHT-LH)

(EXCEPT DUMP VEHICLE)

HORN (RH)

R-6

3W/B

H-16

6

J-65

J-65

5

6

BACKUP LIGHT

(REAR COMBINATION LIGHT-LH)

(DUMP VEHICLE)

0.5B/Y

0.5R/L

2L

P-3

P-4

4JH1

N8A0185E

8-200 CAB AND CHASSIS ELECTRICAL

Connector List

No.

Connector Face

X-2

B-70

B-70

E-10

E-10

J-49

J-49

H-14

005-006

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

002-026

2 1

016-003

1

2

3

4

5

6

7

8

9

11 12 13 14

15

16

10

H-14

H-16

H-16

J-62

J-62

J-65

J-65

J-4

No.

Connector Face

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

006-010

1

2

3

4

5

6

006-015

1

2

3

4

5

6

006-010

1

2

3

4

5

6

006-015

1

2

3

4

5

6

001-018

1