Isuzu N-Series. Manual - part 1114

8-168 CAB AND CHASSIS ELECTRICAL

Installation
To install, follow the removal steps in the reverse order,
noting the following point.

1. Tighten the steering shaft nut to the specified

torque.

Tighten:
Shaft nut to 49 N

⋅m (5 kg⋅m / 36 lb⋅ft)

Headlight Leveling

General Description

The circuit consists of starter SW, headlight leveling SW
and headlight leveling actuator.
When the headlight leveling SW is operated with the
starter SW at ON position, the actuator is operated to
change the angle of the optical axis of the headlight.

Operation of The Circuit

Notice:
Arrow marks indicate the direction of current.

1. When headlight leveling SW is turned to “1” posi-
tion

2. When headlight leveling SW is turned to “0” posi-
tion

N8A5163E

0

1

2

3

HEADLIGHT LEVELING

ACTUATOR - LH

HEADLIGHT LEVELING

ACTUATOR - RH

STARTER SW "ON"

HEADLIGHT
LEVELING SW

N8A0145E

0

1

2

3

HEADLIGHT LEVELING

ACTUATOR - LH

HEADLIGHT LEVELING

ACTUATOR - RH

STARTER SW "ON"

HEADLIGHT
LEVELING SW

N8A0146E

CAB AND CHASSIS ELECTRICAL 8-169

Parts Location

N8A5165E

8-170 CAB AND CHASSIS ELECTRICAL

Circuit Diagram

For 12 Volt

B

ST

ACC

ON

P-1

P-2

P-5

FRAME

FL-1  

MAIN

FL-2  

KEY SW

STARTER SWITCH

1

30B

8B

ACG B

H-7

3W/B

2

B-67

X-1

X-1

3

B-67

X-1

X-1

P-3

P-4

OFF

2L

100A

50A

4JH1

2L

FUSE BLOCK

RELAY KEY ON

F-12

10A

H/LAMP

LEVEL

3L

0.5B

3B/Y

3B/Y

3W/L

2

B-421

3

B-421

4

B-421

5

B-421

6

2

3

4

5

6

0.5O/G

0.5O/B

0.5O/W

0.5O/L

0.5O

B-421

1

B-421

14

B-421

4

B-156

10

B-156

6

B-156

7

3

2

4

0

1

B-156

8

B-156

9

B-156

R5

R6

RESISTOR;

H/L LEVELING

R4

R3

R2

R1

0.5R/W

0.5R/W

0.5R/W

0.5B

2

B-155

3

B-155

1

0.5B

0.5B

B-155

ACTUATOR; HLL (LH)

(DR SIDE HEAD LAMP)

2

B-152

3

B-152

1

B-152

ACTUATOR; HLL (RH)

(AS SIDE HEAD LAMP)

0.5R/W

0.5R/Y

0.5R/Y

SW; H/L LEVELING

1

3

2

5

1

N8A5166E

CAB AND CHASSIS ELECTRICAL 8-171

For 24 Volt

X-11

X-11

X-11

X-11

B

ST

ACC

ON

P-1

P-2

P-5

FRAME

FL-1  

MAIN

FL-2  

KEY SW

STARTER SWITCH

1

30B

8B

ACG B

H-7

3W/B

5W/B

3W/B

2

B-67

3

B-67

P-3

P-4

OFF

2L

100A

or

120A

40A

2L

FUSE BLOCK

RELAY KEY ON

F-12

10A

H/LAMP

LEVEL

3L

0.5B

3B/Y

3B/Y

3W/L

2

B-421

3

B-421

4

B-421

5

B-421

6

0.5O/G

0.5O/B

0.5O/W

0.5O/L

0.5O

B-421

1

B-421

14

B-421

1

B-420

6

B-420

3

B-420

2

B-420

4

B-156

10

B-156

6

B-156

7

3

2

4

0

1

B-156

8

B-156

9

B-156

R5

R6

RESISTOR;

H/L LEVELING

R4

R3

R2

R1

0.5R/W

0.5B/W

2

B-155

3

B-155

1

B-155

ACTUATOR; HLL (LH)

(DR SIDE HEAD LAMP)

2

B-152

3

B-152

1

B-152

ACTUATOR; HLL (RH)

(AS SIDE HEAD LAMP)

0.5R/W

0.5B/W

0.5R/Y

0.5R/Y

SW; H/L LEVELING

CONVERTER;

DC-DC(HLL)

0.5L/O

0.5R/W

0.5B/W

1

3

2

5

2

3

4

5

6

1

N8A5480E