Isuzu N-Series – fuse box diagram

Year of production:

Passenger compartment fuse box (4HG1 engine model (type 1), 4JJ1/4HK1 engine models)

No.	Circuit Protected	A
1	ELEC PTO (BATT)	20
2	RR P/WINDOW	20
3	ROOM LAMP, AUDIO	15
4	DOOR LOCK	15
5	FOG LAMP	10
6	P/WINDOW	20
7	ABS	10
8	WIPER	15
9	H/LAMP LO (LH)	10
10	ECU (BATT)	10
11	H/LAMP LO (RH)	10
12	STOP LAMP	10
13	IGNITION 2	15
14	H/LAMP HI (LH)	10
15	H/LAMP HI (RH)	10
16	ELEC PTO (KEY ST)	10
17	STARTER	10
18	IGNITION 1	15
19	SRS	10
20	ECM	10
21	METER	10
22	LAMPS (BATT)	10
23	AUDIO, ACC	15
24	MIRROR	15
25	HORN	15
26	TURN, HAZARD	15
27	TAIL LAMPS	10
28	ILLUMINATIONS	10
29	CORNERING LAMPS, RR FOG LAMP	10
30	BLOWER MOTOR	20
31	SPARE	—
32	SPARE	—
33	SPARE	—
Relay
1	STOP LAMP
2	BLOWER MOTOR
3	KEY ON
4	4HG1: BLANK 4JJ1, 4HK1: DOOR LOCK (LOCK)
5	4HG1: BLANK 4JJ1, 4HK1: REAR FOG LAMP
6	WIPER MAIN
7	HORN
8	WIPER (HIGH/LOW)
9	FOG LAMP
10	PTO MAIN
11	4HG1: BLANK 4JJ1, 4HK1: DOOR LOCK (UNLOCK)
12	POWER WINDOW
13	HEAD LAMP (LOW)
14	4JJ1, 4HK1, 4HG1: 4WD
15	HEAD LAMP (HIGH)
16	TAIL LAMP
17	4HG1: EXHAUST BRAKE CUT 4JJ1, 4HK1: PTO SOLENOID, M/T
18	4HG1: EXHAUST BRAKE 4JJ1, 4HK1: PTO CUT
19	4JJ1, 4HK1, 4HG1: TRANSFER IGNITION 1 4JJ1, 4HK1: CHARGE (ENGINE RUN)
20	4HG1: CHARGE (ENGINE RUN) 4JJ1, 4HK1: POWER WINDOW (REAR)
21	4HG1: PTO SOLENOID, M/T
22	4HG1: PTO CUT

Passenger compartment fuse box (4JB1-T engine model (type 1))

No.	Circuit Protected	A
1	RR P/WINDOW	25
2	FOG LAMPS	15
3	ROOM LAMP, AUDIO	10
4	DOOR LOCK	15
5	EXHAUST BRAKE	10
6	P/WINDOW	25
7	BACK UP LAMP	10
8	WIPER	25
9	H/LAMP LO (LH)	10
10	LAMPS (BATT)	10
11	H/LAMP LO (RH)	10
12	BRAKE LAMPS	10
13	STARTER	10
14	H/LAMP HI (LH)	10
15	H/LAMP HI (RH)	10
16	BLOWER (IG)	10
17	IGNITION 2	10
18	IGNITION 1	10
19	BLANK	—
20	ECM	10
21	METER	10
22	ECU (BATT)	10
23	MIRROR	10
24	ACCESSORIES, AUDIO	15
25	HORN	15
26	TURN, HAZARD	15
27	TAIL LAM PS	10
28	ILLUMINATIONS	10
29	CORNERING LAMPS	10
30	AIR CONDITIONER	10
31	CIGAR	20
32	SPARE	—
33	SPARE	—
34	SPARE	—
35	SPARE	—
Relay
1	STOP LAMP
2	FOG LAMP
3	KEY ON
4	BLANK
5	BLANK
6	WIPER MAIN
7	HORN
8	WIPER (HIGH/LOW)
9	EXHAUST BRAKE
10	RHD: BLANK LHD: POWER WINDOW (REAR)
11	BLANK
12	POWER WINDOW
13	HEAD LAMP (LOW)
14	BLANK
15	HEAD LAMP (HIGH)
16	TAIL LAMP
17	CIGAR
18	BLANK
19	BLOWER MOTOR
20	CHARGE

Passenger compartment fuse box (4HG1 engine model (type 2), 4HG1-T engine models)

No.	Circuit Protected	A
1	LAMPS BATT	10
2	EGR	10
3	ROOM LAMP AUDIO	15
4	DOOR LOCK	15
5	FOG LAMP	10
6	P/WINDOW	20
7	H/LAMP HI (LH)	10
8	H/LAMP HI (RH)	10
9	STOP LAMP	10
10	H/LAMP LO (LH)	10
11	H/LAMP LO (RH)	10
12	BLANK	—
13	TAIL LAMPS	10
14	CORNERING LAMPS	10
15	IGNITION 2	15
16	STARTER	10
17	IGNITION 1	15
18	METER	10
19	ACC AUDIO	15
20	BLANK	—
21	BLOWER	20
22	HORN	15
23	TURN HAZARD	15
24	WIPER	15
25	SPARE	—
26	SPARE	—
27	SPARE	—
Relay
1	TAIL LAMP
2	HEAD LAMP (HIGH)
3	HEAD LAMP (LOW)
4	CHARGE (ENGINE RUN)
5	STOP LAMP
6	BLOWER MOTOR
7	KEY ON
8	EXHAUST BRAKE
9	WIPER MAIN
10	WIPER (HIGH/LOW)
11	BLANK
12	HORN
13	A/C COMPRESSOR
14	POWER WINDOW
15	FOG LAMP

Passenger compartment fuse box (4JB1-TC engine model (type 2), 4JB1 engine models)

No.	Circuit Protected	A
1	BLANK	—
2	ROOM LAMP AUDIO	10
3	EXH BRAKE	10
4	DOOR LOCK	15
5	FOG LAMP	15
6	P/WINDOW	25
7	H/LAMP HI (LH)	10
8	H/LAMP HI (RH)	10
9	STOP LAMP	10
10	H/LAMP LO (LH)	10
11	H/LAMP LO (RH)	10
12	TAIL LAM PS	10
13	LAMPS BATT	10
14	IGNITION 2	10
15	STARTER	10
16	ENGINE STOP	10
17	IGNITION 1	10
18	BACK UP LAMPS	10
19	METER	10
20	ACC AUDIO	15
21	AIR CON	10
22	HORN	15
23	TURN HAZARD	15
24	WIPER	25
25	SPARE	—
26	SPARE	—
27	SPARE	—
Relay
1	TAIL LAMP
2	HEAD LAMP (HIGH)
3	HEAD LAMP (LOW)
4	POWER WINDOW
5	STOP LAMP
6	CHARGE (ENGINE RUN)
7	KEY ON
8	EXHAUST BRAKE
9	WIPER MAIN
10	WIPER (HIGH/LOW)
11	FOG LAMP
12	HORN
13	BLANK
14	BLOWER MOTOR

Fuse and Relay Location (Cab Exterior)

No.	Circuit Protected	A
1	MARKER LAMP 4HG1: Not used	10
1	4JB1-TC: FUEL HEATER	15
2	ECM MAIN 4JB1-TC, 4HG1: Not used	10
3	BATTERY	10
3	4JB1-TC: BATTERY	15
4	A/C 4JB1-TC: Not used	10
5	4HK11,2), 4JJ1: Not used 4JB1-TC: MARKER LAMP 4HG1: FUEL HEATER	20
6	4HK1, 4JJ1: Not used 4JB1-TC: A/C 4HG1: ENGINE STOP	15
Relay
1	STARTER
2	4HK1, 4JJ1: ECM 4JB1-TC, 4HG1: Not used
3	GLOW PLUG
4	A/C COMPRESSOR
5	CONDENSER FAN
6	4HK1, 4JJ1: STARTER CUTOFF 4JB1-TC: EXHAUST BRAKE 4HG1: ENGINE STOP
7	4HK11), 4JJ1: MARKER LAMP (MODEL WITH REAR FOG LAMP) 4HK12): EXHAUST BRAKE 4JB1-TC, 4HG1: FUEL HEATER
8	GEARSHIFTER
9	4WD (NPS MODEL)
10	FUEL HEATER (MODEL WITH FUEL HEATER)
11	TRANSFER GEAR CONTROL (NPS MODEL)
12	ENGINE RUN> (MODEL WITH FUEL HEATER)
13	4HK12):  MARKER LAMP (MODEL WITH REAR FOG LAMP)
1) 4HK1 engine model (Euro IV emission standards), 4JJ1 engine model 2) 4HK1 engine model (Euro II emission standards or Euro III emission standards)

Fuse and Relay Location (Cab Exterior; 4HG1-T, 4JB1, 4JB1-TC (type 2), 4HG1 (type 2))

No.	Circuit Protected	A
1	4JB1-TC (type 2), 4JB1: POWER SOURCE	15
1	4HG1 (type 2), 4HG1-T: ENG STOP	10
2	4JB1-TC (type 2), 4JB1: FUEL HEATER	15
2	4HG1 (type 2), 4HG1-T: BAT SPARE	10
3	4JB1-TC (type 2), 4JB1: A/C	20
3	4HG1 (type 2), 4HG1-T: FUEL HEATER	10
4	4JB1-TC (type 2), 4JB1: CONDENSER FAN	20
4	4HG1 (type 2), 4HG1-T: A/C	10
Relay
1	GLOW
2	STARTER
3	4HG1 (type 2), 4HG1-T: CSD 4JB1-TC (type 2), 4JB1: Not Used
4	FUEL HEATER
5	CONDENSER FAN
6	EXT BRAKE
7	4HG1 (type 2), 4HG1-T: Not Used 4JB1-TC (type 2), 4JB1: CSD

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.