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.
Circuit/System Description
The body control module (BCM) controls the park lamp relay to ground the control circuit on the park lamp relay when the headlamp switch portion of the turn signal multifunction switch is turned to the PARK or the HEAD position. This energizes the park lamp relay, illuminating the park lamps. The park lamp relay is directly soldered to the underhood fuseblock circuit board. The replacement of the underhood fuseblock needs to be done to replace the park lamp relay.
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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.