Isuzu N-Series. Manual - part 1107

8-140 CAB AND CHASSIS ELECTRICAL

Headlight, Fog Light, Rear Fog Light and Cornering Light

General Description

The circuit consists of headlight, fog light, cornering light, starter switch, combination switch (Lighting switch, dimmer
/ passing switch, cornering light switch), fog light switch, high beam indicator light and relay.
When the lighting SW is turned on by setting it at headlight position, the lighting relay is actuated to turn on the head-
light. The optical axis of the headlight can be turned up or down by operating the dimmer SW while headlight is on.
The passing SW is independent of the lighting SW, and the optical axis of the passing light can be turned up only
while the switch lever is pulled up and held in this state.
Fog light turns on by switching it to “ON” position to activate relay only while lighting SW is on.
When the headlight is on, turn the turn-signal switch left or right, and then the cornering switch built in the combination
switch turns on, followed by the cornering light turning on.

Lighting Circuit

Notice:
Arrow marks indicate the direction of current.

CORNERING LIGHT

HEADLIGHT

FOG LIGHT

REAR FOG LIGHT

Starter sw.(ON)

Cornering
light relay

Dimmer 
relay

Cornering
light

Cornering
light sw.

Lighting sw.

Dimmer sw.

Fog light
sw.

Fog light

LO

HI

L

H

OFF

RR FOG

Rear
fog light

Rear
fog light
relay

Headlight

Headlight 
relay

Tail 
relay

Battery (+)

N8A5573E

CAB AND CHASSIS ELECTRICAL 8-141

Parts Location

Except NKR For Indonesia

N8A5130E

8-142 CAB AND CHASSIS ELECTRICAL

 NKR For Indonesia

N8A0449E

CAB AND CHASSIS ELECTRICAL 8-143

Circuit Diagram

For 12 Volt

X-9

X-4

H-6

B-67

B-67

B-17

B-17

X-6

B-55

B-52

B-72

B-3

B-72

B-87

B-73

B-73

B-4

X-3

H-7

OFF

ON

ACC

ST

B

B-1

B-74

B-5

B-70

B-70

B-74

B-5

B-7

OFF

H

T

HIGH

LO

E2

PASS

B-70

P-5

P-1

P-2

P-3

P-4

2

X-3

X-3

X-3

21

45

1

2

3

X-4

X-4

X-4

1

2

45

X-9

X-9

X-9

21

45

B-4

B-4

B-73

12

3

21

3

B-87

B-87

B-87

32

65

B-3

1

2

1

2

10

10

X-6

X-6

X-6

X-6

21

3

45

11

33

11

9

LH

RH

B-70

B-70

B-70

Hu

2

4

10

7

B-70

B-70

8

1

B-17

1

3

2

KEY SW

FL-2   50A

MAIN

FL-1   100A

MAIN

HEAD LAMP

FL-4   30A

3W/L

8W

5W

2

H-7

2W/R

RELAY; HEADLIGHT

0.3R

DIODE

LIGHTING SWITCH

0.3L/R

0.3R

CORNERING LIGHT SWITCH

COMBINATION SWITCH

0.3L

0.5R/W

0.5P

0.85B

0.5P/B

3B

FRAME-LH (FRONT)

HEADLIGHT

BRACKET (LH)

0.85B

1.25B

0.3R/L

RELAY; DIMMER

1.25B

0.85B

0.85B

0.5B

0.5B

0.5R/G

0.85R/G

0.85R/G

0.5B

1.25R/Y

0.85R/G

0.85R/G

1.25R/Y

0.5R/B

RELAY;
CORNERING LIGHT

0.5G/O

0.5R/L

0.5B/Y

STARTER SWITCH

F-16   10A

METER

3W/B

3W/B

3W/B

8W/B

RELAY; TAIL

0.5LG/R

F-24

HEAD LIGHT
(LH)

F-23

10A

10A

HEAD LIGHT
(RH)

FOG LIGHT SWITCH

HEADLIGHT

HEADLIGHT

2R

2R

CORNERING LIGHT

(RH)

(LH)

HL

0.85R

0.85R/L

HIGH BEAM INDICATOR

LIGHT (METER)

FOG LIGHT (LH)

FOG LIGHT (RH)

2

FRAME

3B

F-7

15A

TAIL LIGHT

F-6

10A

4JH1:3.0W

4JB1, 4JB1-TC:3.0L

FRT FOG LIGHT,
CORNERING LAMP

0.85V

3B

H

 

I

LO

H

 

I

LO

2L

4JH1

3W/B

2W/R

N8A5131E