Fog Lamp Circuit Malfunction
What does B1008 mean?
The B1008 code means the vehicle's onboard diagnostic system has detected: Fog Lamp Circuit Malfunction. This is a low severity code.
Common Symptoms
- Fog lights not turning on
- Fog light indicator on dash not activating
- One or both fog lights inoperative
- Fog lights flicker or cut out
- Fog light switch not responding
Probable Causes (Ranked by Likelihood)
- Burned out fog light bulb Very High
- Blown fog light fuse or relay High
- Corroded fog light connector or socket Moderate
- Damaged wiring from road debris Moderate
- Faulty fog light switch Low
Step-by-Step Diagnostic Procedure
-
Check fog light bulbs visually
-
Test fog light fuse and relay
-
Inspect fog light connectors for corrosion or damage
-
Check wiring from fuse box to fog lights for damage
-
Test fog light switch operation
Frequently Asked Questions
Are fog lights required for my vehicle?
Fog lights are not required by law on most vehicles. However, if your vehicle is equipped with them, they should be maintained in working condition.
Why do fog light bulbs burn out faster than headlights?
Fog lights sit lower on the vehicle and are more exposed to road spray, debris, and water, which can reduce bulb life due to thermal shock and physical damage.
Can road salt cause fog light issues?
Yes. Road salt spray corrodes fog light connectors, mounting hardware, and wiring, especially since fog lights are mounted low and exposed to road spray.