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.
Headlight Control Relay
Remove relay. See HEADLIGHT CONTROL RELAY LOCATION table. Apply battery voltage across specified terminals of relay connector. See HEADLIGHT CONTROL RELAY TEST table. See Fig 1. Check continuity between other specified terminals. If there is no continuity, replace relay.
| Application | Location |
|---|---|
| 4Runner | Right Side Engine Compartment, In Relay Block No. 2 |
| Application Type | Apply Voltage To These Terminals (1) | Continuity Between These Terminals (1) | ||
|---|---|---|---|---|
| 4Runner | 1 & 2 | 3 & 4 | ||
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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.