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
Battery voltage is applied at all times to the body control module (BCM) from the BCM 5 Fuse located in the underhood fuse block. When the brake pedal is applied, battery voltage is applied through the stop lamp switch and the stop lamp signal circuit to the BCM. The BCM then applies battery voltage through the stop lamp relay coil supply voltage circuit energizing the STOP LAMPS PCB Relay. With the relay energized, battery voltage is applied through the switch side of the relay and the control circuit to the auxiliary stop lamps.
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.