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.
Light Failure Sensor
Disconnect light failure sensor 12-pin connector in trunk. Check for continuity or voltage between ground and specified terminals. See LIGHT FAILURE SENSOR TEST table. See Fig 1. If values are as specified, replace light failure sensor. If values are not as specified, check and repair wiring harness as necessary. See appropriate wiring diagram in WIRING DIAGRAMS .
| Terminal | Condition | Value |
|---|---|---|
| 1 | Always | Continuity |
| 2 | Always | Continuity |
| 3 | Always | Continuity |
| 5 | Always | Continuity |
| 9 | Always | Continuity |
| 11 | Always | Continuity |
| 3 | Light Control Switch Off | Zero Volts |
| " | Head Or Tail Lights On | Battery Voltage |
| 4 | Ignition; Lock Or ACC | Zero Volts |
| " | Ignition On | Battery Voltage |
| 7 | Stoplight Switch Off | Zero Volts |
| " | Stoplight Switch On | Battery Voltage |
| 8 | Ignition; Lock Or ACC | Zero Volts |
| " | Ignition On | Battery Voltage |
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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.