Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA19904RUNNER 2D UTILITY, 3.0 V, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMEPOWER WINDOWSCOMPONENT TESTINGPOWER WINDOW SWITCHBACK DOOR POWER WINDOW CONTROL SYSTEM
1990 Toyota 4Runner 2D Utility, 3.0 V, Automatic
Back Door Power Window Control System
1990 Toyota 4Runner 2D Utility, 3.0 V, AutomaticSECTION Back Door Power Window Control System
POWER WINDOW & BACK DOOR WARNING LIGHT TROUBLE SHOOTING
| Problem/Possible Cause | Remedy | |
|---|---|---|
| Power Window Does Not Work | ||
| Fusible Link Blow | Replace Fusible Link | |
| Circuit Breaker Off | Reset breaker and check for short | |
| WIPER fuse blown | Replace fuse and check for short | |
| Power window & wiper relay faulty | Check relay | |
| Power window regulator switch faulty | Check switch | |
| Window lock switch faulty | Check switch | |
| Back door control switch faulty | Check switch | |
| Door lock detection switch faulty | Check switch | |
| Power window motor faulty | Check motor | |
| Rear wiper motor faulty (w/rear wiper) | Check motor | |
| Wiring or ground faulty | Repair as necessary | |
| BACK DOOR Warning Light Does Not Work (Ignition Switch ON) | ||
| GAUGE Fuse Blown | Replace fuse and check for short | |
| Light Bulb Burned out | Replace Bulb | |
| Door Lock detection switch faulty (Back door Open) | Check switch | |
| Back door unlock warning switch faulty (Back door unlocked) | Check switch | |
| Power window & wiper relay faulty | Check relay | |
| Wiring or ground faulty | Repair as necessary | |
| Back Door Unlock warning buzzer warning does not sound | ||
| Wiper Fuse blown | Replace fuse and check for short | |
| Door lock detection switch | Check switch | |
| Power window regulator switch faulty | Check switch | |
| Back door control switch faulty | Check switch | |
| Power window & wiper relay faulty | Check relay | |
| Wiring or ground faulty | Repair as necessary | |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.