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.
Daytime Running Light Main Relay Circuit
Disconnect connector from relay and backprobe from wiring harness side. See Figure. See INSPECTING DAYTIME RUNNING LIGHT MAIN RELAY CIRCUITΒ table. If circuit test results are as specified, replace relay. If test results are not as specified, inspect and repair related circuit wiring. See WIRING DIAGRAMSΒ .
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| 2 - Ground | Light Control Switch OFF | No Continuity |
| 2 - Ground | Light Control Switch TAIL Or HEAD | Continuity |
| 4 - Ground | Light Control Switch OFF Or TAIL | No Continuity |
| 4 - Ground | Light Control Switch HEAD | Continuity |
| 6 - Ground | Headlight Dimmer Switch FLASH | Continuity |
| 8 - Ground | Engine Running | B+ Voltage |
| 7 - Ground | Constant | Continuity |
| 10 - Ground | Constant | Continuity |
| 13 - Ground | Headlight Dimmer Switch FLASH Or HI | Continuity |
| 12 - Ground | Constant | B+ Voltage |
| 1 - Ground | Ignition Switch OFF | No Voltage |
| 1 - Ground | Ignition Switch ON | B+ Voltage |
| 9 - Ground | Terminal No. 3 Ground | B+ Voltage |
| 11 - Ground | Rear Fog Light Switch ON, Terminal No. 3 Ground | B+ Voltage |
| 5 - Ground | Constant | B+ Voltage |
| 14 - Ground | Terminal No. 5 Ground | 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:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.