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.
Theory Of Operation
The Fog Lamp Switch is integral to the Headlamp Switch. When the Body Control Module (BCM) receives an input signal from the Headlamp Switch, requesting Front Fog Lamp illumination, the BCM provides a voltage signal, through the Left and Right Front Fog Lamp Control Circuits, to activate the Left and Right Front Fog Lamps. A separate ground circuit is provided to the Left and Right Front Fog Lamps through the wiring harness to the body sheet metal.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.