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.
Diagnostic Aids
The following conditions may cause an intermittent:
- Intermittent short to ground or open in White wire between BCM and rear defogger relay.
- Poor connections at BCM, instrument panel electrical center or rear defogger relay.
- Internal open or short in rear defogger relay.
If White wire between BCM and rear defogger relay is shorted to ground, rear defogger will stay on at all times. If White wire between BCM and rear defogger relay is open, rear defogger will stay off at all times.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.