Losing functions on my car

Question edited for clarity, 'fuse', unless you light it 'fuze'.Question moved to sub category.

If the radio has an inline fuse, it will be within 82 of the plug at the rear. They are built into the harness. Unlikely because there are three fuses covering audio.

https://fuse-box.info/isuzu/isuzu-trooper-1992-2002-fuses-and-relays

C11 10 (AUDIO[ACC]) MIRROR Audio, Door mirror, Door mirror control SW, Door mirror folding SW, Digital clock, Speaker C12 20 CIGARETTE Cigarette lighter C13 10 ANTI THEFT Anti-theft controller C14 15 STOP A/T CONT Stoplight SW (w/o cruise control), Brake SW (w/cruise control), Rear wheel anti-lock brake controller, Stoplight, Transmission control module, Electronic brake control module, Trailer harness connector, Cruise control unit, A/T shift lock control unit, Lockup off relay C15 20 AUDIO[BJ] Horn, Horn relay, Horn SW, Hazard warning light SW, Flasher unit, Anti-theft horn, Hazard warning light, Audio C15 20 TELEPHONE Telephone C16 10 CLOCK[B] ROOM Digital clock, Audio, Dome light, Map light, Luggage room light, Courtesy light, Door SW (Front, rear, tail gate), Antenna, Anti-theft controller, Key remind SW, Seat belt, Key & light remind buzzer

Engine compartment

Toyota Matrix - fuse box - engine compartment

Instrument panel

Toyota Matrix - fuse box - instrument panel

Fuses (type A)

Fuse Ampere rating Description 1 FOG 15 Front fog lights 2 HEAD LH UPR 10 Left?hand headlight (high beam) 3 HEAD RH UPR 10 Right?hand headlight (high beam), high beam indicator light 4 SPARE 30 Spare fuse 5 SPARE 15 Spare fuse 6 SPARE 10 Spare fuse 7 ETCS (1ZZ?FE engine with two?wheel drive models only) 10 Electronic throttle control system 8 AMP 30 Car audio system 9 MAIN 30 Starting system, "AM2" fuse 10 DOME 15 Car audio system, clock, personal lights, interior light, trunk light, open door warning light, wireless remote control system 11 HORN 10 Horn 12 HAZARD 10 Emergency flashers, turn signal lights 13 EFI 15 Multiport fuel injection system/sequential multiport fuel injection system, emission control system, "EFI" fuse 14 ALT?S 5 Charging system 15 HEAD LH LWR 10 Left?hand headlight (low beam) 16 HEAD RH LWR 10 Right?hand headlight (low beam) 17 EFI2 (1ZZ?FE engine with two? wheel drive models only) 15 Multiport fuel injection system/ sequential multiport fuel injection system, emission control system 18 TAIL 15 Tail lights, license plate lights, instrument panel lights, instrument cluster lights, clock 19 OBD 7,5 On?board diagnosis system 20 WIPER 25 Windshield wipers 21 AM2 15 Charging system, multiport fuel injection system/sequential multiport fuel injection system, starting system, SRS airbag system 22 STOP 15 Stop lights, high mounted stoplight, anti?lock brake system, shift lock control system, multiport fuel injection system/sequential multiport fuel injection system, cruise control system 23 DOOR 25 Power door lock system, glass hatch opener switch 24 AM1 25 "CIG" fuse 25 ECU?IG 10 Electric cooling fan, anti?lock brake system, traction control system, vehicle stability control system, brake assist system, shift lock control system, cruise control system 26 RR WIPER 15 Rear window wiper 27 A/C 10 Air conditioning system 28 INV 15 Power outlet (115 VAC) 29 P/POINT 15 Power outlet (12 VDC/ in the rear console box) 30 ECU?B 10 Daytime running light system 31 CIG 15 Power outlet (on the instrument panel) or cigarette lighter, car audio system, clock, power rear view mirror control, shift lock control system 32 GAUGE 10 Gauges and meters, air conditioning system, daytime running light system, charging system, auto anti?glare inside rear view mirror, power windows, cruise control system, rear window defogger, back?up lights, front passenger's seat belt reminder light 33 WASHER 15 Windshield washer, rear window washer 34 M?HTR/DEF I?UP 10 Engine control system

Fuses (type B)

Fuse Ampere rating Description 35 ABS NO.1 30 Anti?lock brake system, vehicle stability control system, traction control system, brake assist system 36 RDI FAN 30 Electric cooling fan 37 ABS NO.2 40 (without vehicle stability
control system) Anti?lock brake system 50 (with vehicle stability
control system) Anti?lock brake system, vehicle stability control system, traction control system, brake assist system 38 HEAD MAIN 40 "HEAD LH UPR", "HEAD RH UPR", "HEAD LH LWR" and "HEAD RH LWR" fuses 39 AIR PUMP 50 (1ZZ?FE engine with four?wheel drive models and 2Z ?GE engine only) Emission control system 40 HTR 40 Air conditioning system 41 DEF 30 Rear window defogger, "M?HTR/DEF I?UP" fuse 42 POWER 30 Power windows, electric moon roof

Fuses (type C)

Fuse Ampere rating [A] Description 43 ALT 100 Charging system, "ABS NO.1", "ABS NO.2", "RDI FAN", "FOG", "HTR", "AM1", "POWER", "DOOR", "ECU?B", "TAIL", "STOP", "P/POINT", "INV" and "OBD" fuses WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

Have you checked the connection under the air bag on the steering wheel but you must remember to disconnect the battery leads then leave the car for 30 minutes for the air bag to discharge before doing that I would pull the radio out from the dashboard and check all the multi plugs on the back of it first there are normally a fuse for multifunctional steering wheel control just check make sure you tested the right fuse

I'll guess that your air bag light is on as well? Sounds Like you need a new clockspring in the steering wheel. This device replaced the old copper slip rings when air bags come out.

Sound to me like you have blown a fuse. Anything else not working?

The air bag light has to do with the air bag sensors in the bumper being bad, or the air bag module being bad.

The cruise control not working has to do with a broken cable from the cruise control mechanism, or a blown fuse for cruise control, or the cruise control being turned off.

Your issue is most likely the clock spring which is part of the air bag system.

All of the signals controlling these functions are routed through the clock spring.

Should cost around 200-300 to have it done, or more like 100-150 if you do it yourself. You must know what you are doing though as the airbag system is not to be taken lightly.

The clockspring behind the steering wheel is possibly defective or unplugged. It is the one and only component that all of your symptoms have in common.

1996 is all I have. Look on back of cover for fuse chart.

Location
The fuse junction panel is located to the left of the steering column. To expose the fuse junction panel, remove the fuse panel cover (14A003) as outlined.


Fuse Loc. Number Fuse Amp Rating Fuse Color Circuit Protected 1 — — Not Used 2 5A Tan Instrument Illumination 3 10A Red Left Low Beam Headlamp 4 10A Red Right Low Beam Headlamp 5 5A Tan Brake/Shift Interlock Rear Window Defrost 6 15A Lt Blue Back-Up Lamps/Air Conditioning, Speed Control, TR Sensor 7 10A Red Starter Relay Power, TR Sensor 8 5A Tan Radio Mute, Power Antenna, GEM Module 9 10A Red Anti-Lock Brake System, Central Temperature Monitor 10 20A Yellow Electronic Engine Control (EEC) Relay, Ignition Coil, PATS, Radio 11 5A Tan Air Bags, Alternator Indicator Lamp 12 5A Tan Gauges, Warning Lamps, Transmission Control Switch, GEM Module, Integrated Control Panel Autolamps 13 5A Tan Air Bags, Blower Motor, Electronic Automatic Temperature Control 14 5A Tan Light-Out Module 15 10A Red Multi-Function Switch (Turn Signals) 16 — — Not Used 17 30A Lt Green Front Windshield Wipers/Washers 18 5A Tan Headlamp Switch Illumination 19 15A Lt Blue Rear Window Wiper/Washer 20 5A Tan Radio Memory, Phone, Remote Anti-Theft Personality (RAP) Module, Integrated Control Panel (ICP) 21 20A Yellow Cigar Lighter 22 5A Tan Power Rearview Mirrors, Antenna, Decklid Lamps, Autolamp 23 5A Tan Generic Electronic Module (GEM) Power, Remote Anti-Theft Personality (RAP) Module, Passive Anti-Theft System (PATS) Module 24 5A Tan Integrated Control Panel, Radio, Speedometer 25 10A Red Diagnostics (Data Link Connector) (DLC) 26 15A Lt Blue Decklid Release 27 10A Red Battery Saver System 28 15A Lt Blue Stoplamps, Speed Control 29 15A Lt Blue Multi-Function Switch (Hazard Lamps) 30 15A Lt Blue Highbeam Headlamps, Daytime Running Lamps (DRL), Instrument Cluster 31 5A Tan Tail Lamps 32 5A Tan Heated O/S Rear View Mirrors, Integrated Control Panel (ICP) 33 5A Tan Power Window and Lock Switch Illumination 34 — — Battery Saver Relay 35 — — Driver Unlock Relay 36 — — Rear Defrost Relay 37 — — Interior Lamp Relay 38 — — Driver Power Window Relay (One Touch Down) 39 — — Accessory Delay Relay

Bet switches in steering wheel are bad...Very common. Especially if it has a air bag and the air bag light is on...I would clean the switches or if it has a air bag and the light is on replace the clock spring for the air bag and the light will go off and cruise will work again......