Warning Signs the Fog Light is Failing
- The fog light doesn't turn on.
- The fog light is dim or flickering.
- The fog light lens is cracked or broken.
- Moisture is inside the fog light lens.
- The fog light bulb burns out frequently.
How to Test if This Part is the Problem
- Check the bulb: Make sure the fog light bulb isn't burned out. Replace it with a new bulb to see if that fixes the problem.
- Inspect the wiring: Look for any damaged or corroded wires connected to the fog light. Repair or replace any damaged wiring.
- Test the fog light switch: Use a multimeter to check if the fog light switch is sending power to the fog light.
- Check the fog light relay: Locate the fog light relay in the fuse box and test it to see if it's working properly. A faulty relay can prevent the fog light from turning on.
- Inspect the fog light connector: Check the connector that plugs into the fog light assembly for corrosion or damage.
Common Failure Causes for This Part
- Bulb burnout: This is the most common reason for fog light failure.
- Impact damage: Rocks or debris can crack or break the fog light lens.
- Moisture intrusion: Water can get inside the fog light assembly and corrode the electrical components.
- Wiring problems: Damaged or corroded wiring can prevent the fog light from working.
- Relay failure: A faulty fog light relay can prevent power from reaching the fog light.