Isuzu N-Series. Manual - part 1143

8-284 CAB AND CHASSIS ELECTRICAL

Removal
Preparation:
Disconnect the battery ground cable.

1. Door Pad

Refer to “FRONT DOOR TRIM PAD” of section 2.

2. Speaker Panel

Disconnect the speaker connector.

3. Speaker
4. Waterproof Sheet

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

Cigar Lighter

Removal
Preparation:
Disconnect the battery ground cable.

1. Center Cluster

Refer to “RADIO” in this section.

2. Cigar Lighter Assembly

Remove the nut, then remove cigar lighter assem-
bly, bezel and outer case.

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

Meter and Warning/indicator Light

General Description

The circuit consists of the starter switch, meter assem-
bly, vacuum tank switch, seat belt switch, oil pressure
switch, fuel sedimenter switch, brake fluid switch, park-
ing brake switch, vehicle speed sensor, fuel tank unit,
thermo unit and engine speed sensor.
The meter assembly contains the speedometer, ta-
chometer, fuel meter, thermometer and the warning/in-
dicator light.
The meter warning/indicator lights and their bulb sock-
ets are a unit, they are installed from the back of the
speedometer assembly.

Legend

1. Trim Panel
2. Speaker Panel
3. Speaker
4. Waterproof Sheet

N8A5341E

Legend

1. Center Cluster
2. Cigar Lighter Assembly

N8A5342E

CAB AND CHASSIS ELECTRICAL 8-285

Parts Location

For 12 Volt

F-4, F-7, F-16

J-128 HBB

LEVEL SW

(Except 4JH1)

B-236 AIR

PRESSURE SW

N-5 SEAT BELT SW

H-5~H-7

X-13

BUZZER CANCEL RELAY

X-5 ABS

INDICATOR RELAY

B-18 DIODE

X-33 DIODE

B-338

TACHOGRAPH

(IN INST)

N8A5603E

8-286 CAB AND CHASSIS ELECTRICAL

For 24 Volt

X-33

DIODE

X-5 INDICATOR RELAY

N-5 SEAT BELT SW

F-4, F-7, F-16

H-5~H-8

N8A5604E

CAB AND CHASSIS ELECTRICAL 8-287

Circuit Diagram

Except 4JH1 / 4HK1 Engine

B-51

B-52

0.3BR/Y

0.3BR

B-52

3

0.5W/L

RELAY; CHARGE (5)

B-85

B-85

B-51

14

2

1

0.3W/B

0.5B

0.5B/Y

0.3W/B

0.3W/B

0.3W/B

0.3W/B

0.3B

SHORT CONNECTOR (WITH HBB)

RELAY;
BUZZER CANCEL

BRAKE FLUID SWITCH

3B

11

3

5

X-13

X-13

X-13

X-13

2

4

1

HBB LEVEL
SW

J-128

J-128

2

J-128

J-128

4

12

TACHOMETER

SPEEDOMETER

CHARGE

SEAT BELT (SAUDI ARABIA)

GLOW

COOLANT 
TEMPERATURE GAUGE

TURN - RH

BOOST

TURN - LH

HIGH BEAM

EXHAUST BRAKE

SPEED WARNING

(SAUDI ARABIA)

VACUUM

BRAKE FLUID LEVEL

ILLUMINATION (X5)

WATER

SEDIMENTER

OIL PRESSURE

BUZZER

REAR FOG

H-14

H-14

E-2

E-2

H-5

H-5

B-52

B-52

39

38

10

9

1

2

ENGINE 
SPEED
SENSOR

0.3L/O

0.5B/L

9

8

H-5

H-14

E-7

B-55

4

23

6

1

0.3Y/B

FUEL GAUGE

FUEL LEVEL

J-28

J-28

3

B-55

B-51

H-5

H-5

10

5

14

21

2

1

J-28

0.3BR/R

0.3Y/R

B-55

H-5

J-32

J-32

B-55

H-5

B-52

H-5

B-55

J-32

7

2

31

19

31

25

2

1

3

0.85B

0.3Y/G

0.3B/Y

0.5B

WATER SEDIMENTER SW

SEAT BELT SW

N-5

N-5

H-12

3B

B-51

H-12

2

10

3

4

3

1

5

1

0.5B

0.3W/G

0.3W/G

J-53

J-54

B-51

H-5

12

30

1

1

0.3BR/W

0.5BR/W

B-51

6

0.3O/L

0.5W

2B

0.5B

0.3W/V

0.5B/Y

QOS-III CONTROL UNIT (13)

ABS

B-51

7

0.5L/O

0.5B/L

0.5L/O

0.5B/L

0.5Y/B

0.5Y/B

THERMO UNIT

0.5BR/R

0.5Y/R

FUEL TANK UNIT

0.5Y/G

0.5B/Y

0.5B

 

SIG

+

OIL PRESSURE SW (55, 69, 66)

J-8

B-52

H-5

1

20

1

0.3SB

0.5SB

QOS-II CONTROL UNIT (7)

9

TIMER

B-52

12

B-55

B-55

B-55

B-51

EXHAUST BRAKE SW
 B-69   (2)

B-51

8

B-52

5

HEAD LIGHT (LH)

TURN SIGNAL LIGHT SW
 B-70   (5)

TURN SIGNAL LIGHT SW
 B-70   (13)

RELAY:
RR FOG LIGHT(5)

FUSE NO. 9

RELAY; TAIL (5)

H-7

B-67

B-67

B

ST

ACC

ON

OFF

2

P-1

P-2

P-3

P-4

P-5

2

1

3

FRAME

FL-1  

3B/Y

STARTER SW

(24V MODEL)

F-16  10A

METER

H-6

3W/L

MAIN

FL-2

100A or 120A

40A(24V)

50A(12V)

KEY SW

8W

0.5B/Y

F-4  15A

AUDIO(B), DOOR LOCK

0.5LG/R

(24V)

0.5LG/L

11

8

10

1

0.5R/G

0.5G/B

0.5G/W

0.5R/B

B-55

2

0.3W

0.5R

0.85R

5W/B (24V)

8W/B (12V)

B-7

J-9

HEADLIGHT

BRACKET (LH)

FRAME-LH

(CENTER)

B-1

FRAME-LH

(FRONT)

0.5B

VEHICLE SPEED SENSOR

DSW

QOS-III CONTROL UNIT (9)

2B

SENSOR

POWER SOURCE

CIRCUIT

B-52

4

EHCU ; ABS

ABS INDICATOR RELAY

X-5

X-5

X-5

X-5

SHORT CONNECTOR (W/O HBB)

1

5

4

3

10

6

2

0.3W/B

PARKING BRAKE
SW

0.3W/B

3

1

H-12

H-5

N-6

0.3W/L

0.3BR

9

3

78

X-33

X-33

X-33

DIODE

0.3

W/R

0.3W/B

H-5

H-5

0.5BR

0.5W/B

13

98

0.5W/R

23

4

B-18

B-18

VACUUM TANK
SW

1

DIODE

AIR PRESSURE
SW

B-236

B-236

2

1

0.3BR

0.3
BR

0.3BR

0.3

BR/Y

B-71

B-18

N8A0527E