Isuzu N-Series. Manual - part 1081

8-36 CAB AND CHASSIS ELECTRICAL

For 24 Volt-4HK1 Engine

HEATER &

A/C RELAY

10A

HEAD LIGHT LH

F-24

10A

HEAD LIGHT RH

F-23

10A

STARTER

F-22

10A

ABS (IG)

F-21

15A

HORN, HAZARD

F-20

10A

ENG. (BACK UP) HSA

F-19

F-18

F-17

10A

METER

NEES (B)

NEES (IG)

SRS

F-16

15A

AUDIO (IG), CIGAR LIGHTER

F-15

F-14

F-13

10A

H/LAMP LEVEL

10A

F-12

10A

TURN LIGHT

15A

F-11

15A

FRONT WIPER & WASHER

F-10

10A

F-9

10A

FRT FOG LIGHT

F-8

10A

TAIL LIGHT

ENG. (IG)

F-7

F-25

20A

POWER WINDOW

F-6

10A

STOP LIGHT

F-5

15A

AUDIO (B), DOOR LOCK

F-4

15A

REAR HEATER

F-3

10A

FUEL HEATER

F-2

15A

HEATER, AIR CON

F-1

FL-26

30A

HEAD LAMP

FL-4

FL-25

INDICATION ON LABEL

INDICATION ON LABEL

HSA

KEY ON

RELAY

HEATER

RELAY

TAIL

RELAY

HEAD LIGHT

RELAY

COMBINATION SWITCH

STARTER

STARTER

RELAY

CONDENSER FAN

ABS UNIT

GLOW PLUG

RELAY

CONDENSER FAN

RELAY

KEY SW OFF

ACC

ON

ST

60A

GLOW

FL-3

40A

ABS

FL-9

60A

STARTER

FL-8

40A

KEY

FL-2

REAR FOG

RELAY

COMBINATION

SWITCH

CHARGE

WARNING

RELAY

100A or 120A

MAIN

FL-1

MARKER

LIGHT

RELAY

15A

F-26

10A

F-27

GENERATOR

GENERATOR B

RR FOG

COND. FAN

MARKER LAMP

METER

(BOOST IND)

10A

F-28

10A

10A

ECM MAIN

RELAY

40A

ECM. ENG.

FL-5

STARTER CUT

RELAY

NEUTRAL SWITCH

TCM

GEAR SHIFTER

RELAY

TCM

60A

NEES

FL-7

CERAMIC HEATER

60A

CERAMIC HEATER

FL-6

REAR FOG

MARKER LIGHT

ECM. ENG.

GLOW PLUG

ECM

ECM

ECM

ECM

ECM

N8A5589E

CAB AND CHASSIS ELECTRICAL 8-37

Reference Table of Fuse and Circuit Breaker

Fuse

12 Volt 4JB1 / 4JG2 Engine

Fuse No.

Capacity

Indication on label

Main parts (Load)

F-1

10 A

AIR CON

A/C switch, A/C thermo relay, Pressure switch, Magnetic
clutch, VSV: FICD, Electronic thermostat

F-2

15 A

EXH. BRAKE, FUEL 

HEATER

Exhaust brake switch, Exhaust brake control relay, Exhaust
brake magnetic valve, Clutch switch, Accel switch, Fuel heater 

F-3

15 A

REAR HEATER

Rear heater, Rear heater switch

F-4

15 A

AUDIO (B), DOOR 

LOCK

Radio & clock, Dome light switch, Dome light, Door switch
(RH & LH), Door lock switch, Door lock actuator, Door lock
controller, Speedometer, Key cylinder switch, Key remind
buzzer

F-5

10 A

STOP LIGHT

Stoplight switch, Stoplight

F-6

10 A

FRT FOG LIGHT, 

CORNERING LAMP

Fog light switch, Fog light, Lighting switch, Cornering light
relay, Cornering light, Cornering light switch

F-7

10 A

TAIL LIGHT

Tail relay, Illumination light(s), Clearance light(s), Tail light(s)

F-8

10 A

EGR

ECM ignition

F-9

10 A

FUEL CUT

Fuel cut solenoid

F-10

15 A

FRONT WIPER & 

WASHER

Wiper & Washer switch, Wiper motor, Washer motor, Intermit-
tent relay

F-11

10 A

TURN LIGHT

Flasher unit, Front turn signal light, Rear turn signal light, Turn
signal light switch, Hazard warning switch

F-12

10 A

H/LAMP LEVEL

Headlight leveling switch, Headlight leveling motor (actuator)

F-13

—

—

—

F-14

—

—

—

F-15

15 A

AUDIO (IG), CIGAR 

LIGHTER

Radio, Cigar lighter

F-16

10 A

METER

Exhaust brake control relay, CSD Relay, Key remind buzzer,
Backup light switch, Backup light, Neutral switch, Starter relay,
QOS-II controller, QOS-III controller, Glow relay, Glow-1 relay,
Glow-2 relay, Glow indicator (Meter), Coolant temperature
gauge, Thermo unit, Vehicle speed sensor (Installed on the
meter assembly & Transmission), Meter assembly, Power
window relay, Cornering light relay

F-17

—

—

—

F-18

—

—

—

F-19

15 A

HORN, HAZARD

Horn, Horn relay, Horn switch, Flasher unit, Hazard warning
switch

F-20

10 A

ABS (IG)

ABS

F-21

15 A

GENERATOR

Generator

F-22

10 A

STARTER

Starter relay, QOS-II controller, QOS-III controller

F-23

10 A

HEAD LIGHT RH

Headlight (RH), Dimmer relay, High beam indicator light

F-24

10 A

HEAD LIGHT LH

Headlight (LH), Dimmer relay

F-25

15 A

MARKER LAMP

Marker light, Marker light relay

F-26

15 A

COND. FAN

Condenser fan

F-27

10 A

RR FOG

Rear fog light switch, Rear fog light relay

8-38 CAB AND CHASSIS ELECTRICAL

12 Volt 4JH1 Engine

F-28

—

—

—

Fuse No.

Capacity

Indication on label

Main parts (Load)

F-1

10 A

AIR CON

A/C switch, A/C thermo relay, Pressure switch, Magnetic
clutch, VSV: FICD, Electronic thermostat

F-2

15 A

FUEL HEATER

Fuel heater 

F-3

15 A

REAR HEATER

Rear heater, Rear heater switch

F-4

15 A

AUDIO (B), DOOR 

LOCK

Radio & clock, Dome light switch, Dome light, Door switch
(RH & LH), Door lock switch, Door lock actuator, Door lock
controller, Speedometer, Key cylinder switch, Key remind
buzzer

F-5

10 A

STOP LIGHT

Stoplight switch, Stoplight

F-6

10 A

FRT FOG LIGHT, 

CORNERING LAMP

Fog light switch, Fog light, Lighting switch, Cornering light
relay, Cornering light, Cornering light switch

F-7

10 A

TAIL LIGHT

Tail relay, Illumination light(s), Clearance light(s), Tail light(s)

F-8

15 A

ENG. (B1)

ECM battery

F-9

15 A

ENG. (B2)

ECM battery

F-10

15 A

FRONT WIPER & 

WASHER

Wiper & Washer switch, Wiper motor, Washer motor, Intermit-
tent relay

F-11

10 A

TURN LIGHT

Flasher unit, Front turn signal light, Rear turn signal light, Turn
signal light switch, Hazard warning switch

F-12

10 A

H/LAMP LEVEL

Headlight leveling switch, Headlight leveling motor (actuator)

F-13

—

—

—

F-14

—

—

—

F-15

15 A

AUDIO (IG), CIGAR 

LIGHTER

Radio, Cigar lighter

F-16

10 A

METER

Key remind buzzer, Backup light switch, Backup light, Starter
relay, Glow indicator (Meter), Coolant temperature gauge,
Thermo unit, Vehicle speed sensor (Installed on the meter
assembly & Transmission), Meter assembly, Power window
relay, Cornering light relay

F-17

—

—

—

F-18

—

—

—

F-19

15 A

HORN, HAZARD

Horn, Horn relay, Horn switch, Flasher unit, Hazard warning
switch

F-20

10 A

ABS (IG)

ABS

F-21

—

—

—

F-22

10 A

STARTER

Starter relay, QOS-II controller, QOS-III controller

F-23

10 A

HEAD LIGHT RH

Headlight (RH), Dimmer relay, High beam indicator light

F-24

10 A

HEAD LIGHT LH

Headlight (LH), Dimmer relay

F-25

15 A

MARKER LAMP

Marker light, Marker light relay

F-26

15 A

COND. FAN

Condenser fan

F-27

10 A

RR FOG

Rear fog light switch, Rear fog light relay

F-28

—

—

—

Fuse No.

Capacity

Indication on label

Main parts (Load)

CAB AND CHASSIS ELECTRICAL 8-39

24 Volt 4HF1 / 4HG1 / 4HE1 Engine

Fuse No.

Capacity

Indication on label

Main parts (Load)

F-1

15 A

HEATER, AIR CON

Blower motor, Blower resistor, Fan switch, A/C switch, A/C
thermo relay, Pressure switch, A/C cut relay, Thermo switch
(A/C cut), VSV: FICD, Electronic thermostat

F-2

10 A

EXH. BRAKE, FUEL 

HEATER

Exhaust brake switch, Exhaust brake control relay, Exhaust
brake magnetic valve, Clutch switch, Accel switch, Fuel heater 

F-3

15 A

REAR HEATER

Rear heater, Rear heater switch

F-4

15 A

AUDIO (B), DOOR 

LOCK

Radio & clock, Dome light switch, Dome light, Door switch
(RH & LH), Door lock switch, Door lock actuator, Door lock
controller, Speedometer, Key cylinder switch, Key remind
buzzer

F-5

10 A

STOP LIGHT

Stoplight switch, Stoplight

F-6

20 A

POWER WINDOW

Power window

F-7

10 A

TAIL LIGHT

Tail relay, Illumination light(s), Clearance light(s), Tail light(s)

F-8

10 A

FRT FOG LIGHT, 

CORNERING LAMP

Fog light switch, Fog light, Lighting switch, Cornering light
relay, Cornering light, Cornering light switch

F-9

10 A

ENG. (IG)

ECM ignition (EXCEPT 4HF1-2)

FUEL CUT 

Fuel cut solenoid (4HF1-2)

F-10

15 A

FRONT WIPER & 

WASHER

Wiper & Washer switch, Wiper motor, Washer motor, Intermit-
tent relay

F-11

10 A

TURN LIGHT

Flasher unit, Front turn signal light, Rear turn signal light, Turn
signal light switch, Hazard warning switch

F-12

10 A

H/LAMP LEVEL

Headlight leveling switch, Headlight leveling motor (actuator)

F-13

10 A

ENG. STOP

Engine stop motor

F-14

—

—

—

F-15

15 A

AUDIO (IG), CIGAR 

LIGHTER

Radio, Cigar lighter

F-16

10 A

METER

Exhaust brake control relay, CSD Relay, Key remind buzzer,
Backup light switch, Backup light, Inhibitor Switch, Neutral
switch, Starter relay, QOS-II controller, QOS-III controller,
Glow relay, Glow-1 relay, Glow-2 relay, Glow indicator (Meter),
Coolant temperature gauge, Thermo unit, Vehicle speed sen-
sor (Installed on the meter assembly & Transmission), Meter
assembly, Power window relay, Cornering light relay

F-17

—

—

—

F-18

15 A

GENERATOR

Generator (Except Hong Kong)

10 A

SRS

SRS (For Hong Kong)

F-19

15 A

ENG. (B)

ECM battery (4HG1-T)

F-20

15 A

HORN, HAZARD

Horn, Horn relay, Horn switch, Flasher unit, Hazard warning
switch

F-21

10 A

ABS (IG)

ABS

F-22

10 A

STARTER

Starter relay, QOS-II controller, QOS-III controller

F-23

10 A

HEAD LIGHT RH

Headlight (RH), Dimmer relay, High beam indicator light

F-24

10 A

HEAD LIGHT LH

Headlight (LH), Dimmer relay

F-25

15 A

MARKER LAMP

Marker light, Marker light relay

F-26

15 A

COND. FAN

Condenser fan