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 Circuit
Remove the relay from the engine room junction block and inspect the relay. See CONNECTOR IDENTIFICATION . See INSPECTING HEADLIGHT CONTROL RELAY CIRCUIT table. If the circuit is as specified, inspect the circuits connected to other parts.
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| 1 - Ground | Constant | B+ Voltage |
| 3 - Ground | Light Control Switch HEAD | Continuity |
| 4 - Ground | Constant | B+ Voltage |
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.