Jimny fuses: what circuits are protected/controlled by what?

As these cars age a bit more, increasingly people are hitting blown fuses/circuits not working etc. This page is about trying to unravel what is controlled by what and where things are.

Fuse (and relay) box locations
Fuses and what they protect
- Under-bonnet
- Passenger compartment

Fuse (and relay) box locations

Need some photos here, but there are two main fuse locations

1. Under bonnet (with a bunch of relays; a couple hide off in an additional box to the side)

2. In the footwell of the car (passenger side)

Some modules can have independent fuses buried inside them or accessed on their back, and, there are very high current fusable links integrated into the battery terminal (pictured in a moment)

Fuses and what they protect

For compatibility, I’ve stuck to official Suzuki numbering that matches the labels on fuse covers.

Under-bonnet

Battery terminal fuses

Note that if you connect items with high current draw (e.g. winches) to the fused side of the terminal you risk blowing those fuses. Sucks to blow a main fuse during a winch pull… separately fused accessories can also go directly to the +ve battery terminal as their fuses will protect the wiring directly.

Fuse #	Circuits	Fuse rating
1	All electrical circuits Alternator	120 A
2	1st circuit: under bonnet fuse/relay box	100 A
3	Blank	80 A
4	2nd circuit: under bonnet fuse/relay box	100 A
5	Internal circuits: cabin, passenger’s side footwell fuse box	50 A

Fuse and relay box

The extra headlight relay box contains up to 4 relays; auto headlight on models appear to only populate and use 2 of these. Presumably this is because the BCM does the headlight switching, rather than the headlight switch on the steering column itself, and so it accommodates full negative switching directly of the headlights. These relays are not numbered in any official documentation for cross reference purposes hence no numbering here.

Relays

Relay number	Label	Circuit	Related fuse #
1	IG COIL	Ignition coils	Under bonnet 13 – 15A
2	RDTR2	Radiator cooling fan, relay #2 (high speed)	Under bonnet 19 (RDTR) – 40A
3	STOP	Brake light	Cabin 61? (BACK) – 10A
4	F/P	Fuel pump	Under bonnet 28 (FI?) – 15A
5	HORN	Horn	Cabin 56 (HORN) – 15A
6	BLW	Blower motor	Under bonnet 7 (BLW) – 30A
7	CPRSR	A/C compressor	Under bonnet 25 (CPRSR) – 10A
8	FI MAIN	Main relay	Under bonnet 28 (FI) – 15A
9	H/L HI	Headlight high beam	Under bonnet 30, 31 (H/L HI R, H/L HI L) – 15A
10	FR FOG	Fog lamp (front)	Under bonnet 23 (FR FOG) – 20A
11		BLANK
12	RDTR	Radiator cooling fan, relay #1 (low speed)	Under bonnet 19 (RDTR) – 40A
13	ST	Starter motor relay	Under bonnet 6 (ST) – 30A
14	RDTR3	Radiator cooling fan, relay #3 (high speed – grounding relay)	Earth’s the 4th pin on the radiator fan motor so no fuse needed

Fuses

Fuse #	Circuit	Label on lid	Capacity
6	Starter motor	ST	30A
7	Blower motor	BLW	30A
8	BLANK
9	ABS/ESP pump	ABS MOT	40A
10	Ignition	IGN	50A
11	Fuses 49, 50 and 51 in cabin fuse box	B/U	30A
12	Headlight high beam relay	H/L HI	25A
13	Ignition coils	IG COIl	15A
14	BLANK
15	ABS/ESP control module	ABS SOL	25A
16	Left headlight / headlight relay	H/L L	15A
17	Right headlight / headlight relay	H/L R	15A
18	Headlight levelling module	H/L CLNR	30A
19	Radiator fan power	RDTR	40A
20	BLANK
21	Power steering	P/S	40A
22	BLANK
23	Fog light(s)	FR FOG	20A
24	4wd module	4WD	10A
25	A/C compressor	CPRSR	10A
26	2nd interior circuit	IGN2	50A
27	A/T transmission control module	T/M	15A
28	Main relay	FI	15A
29	BLANK
30	Headlight high beam R	H/L HI R	15A
31	Headlight high beam L	H/L HI L	15A
32	ECU start signal	ST SIG	5A
33	BLANK

Headlight control relay box (LEDs/auto headlight cars)

Need to check up the things contained in this cause it is separate to the main fuse compartment…

Passenger compartment

Some of these circuits control relays inside the BCM/wiring junction box itself; presumably these are solid state and/or integrated to the circuitry.

Fuse #	Circuit	Label	Capacity
34	Power windows ESP off, hill descent switches	P/W	30A
35	Gauges	MTR	10A
36	ECU Immobiliser	IG	15A
37	Power steering control module	IG1 SIG1	5A
38	BLANK	SHIFT	20A
39	BLANK	S/R	20A
40	BLANK
41	Door locks	D/L	20A
42	BCM – brake light	STL	15A
43	BCM – hazards	HAZ	10A
44	BLANK	A-STOP	5A
45	Rear fog lamp (where fitted)	RR FOG	10A
46	ABS control module Steering angle sensor	ABS	5A
47	Seat heater (where fitted)	S/H	15A
48	Autonomous braking sensor	IG1 SIG3	5A
49	Interior ceiling light(s)	DOME2	10A
50	Gauges (lighting?)	DOME	5A
51	Infotainment/radio permanent power	RADIO	15A
52	CAN gateway module TPMS module (if fitted) Emergency call module (if fitted)	CONT	5A
53	Ignition switch	KEY 2	5A
54	Power window main switch Other switches in central switch panel	P/W T	20A
55	Ignition switch	KEY	5A
56	Horn relay	HORN	15A
57	Left tail light	TAIL L	5A
58	Right tail light	TAIL R	10A
59	Airbag	A/B	10A
60	4wd, transmission, CAN gateway modules TPMS/Emergency call modules (if fitted) Brake light switch Headlight switch	IG1 SIG	10A
61	Reverse light switch A/T gear position signals Headlight levelling module HVAC control unit – manual HVAC control panel – auto climate BCM (some circuits)	BACK	10A
62	BLANK	ACC3	10A
63	Rear window heater/demister	RR DEF	5A
64	Power mirrors: motors for adjustment/swivel HVAC control unit	MRR HTR	10A
65	Accessory power/cigarette lighter socket (Front and rear, if fitted)	ACC2	15A
66	Infotainment system (switched power?) Power mirror switch	ACC	5A
67	Rear wiper motor & relay	WIP	10A
68	Blower motor fan relay Rear demister relay	IG2 SIG	5A
69	Front, rear washer motors Headlight washer motor (if fitted)	WASH	15A
70	Front wiper motor	FR WIP	25A
71	Brake light relay Brake light switch	STOP	10A