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Diagnosis And Testing - Fog Lamp

WARNING: This page is about a different car, the 2006 Chrysler PT Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
FOG LAMP DIAGNOSIS

CONDITION  POSSIBLE CAUSES  CORRECTION 
FRONT FOG LAMP DOES NOT ILLUMINATE 1. Ineffective or missing bulb. 1. Test and replace front fog lamp bulb as required.
2. Ineffective ground circuit. 2. Test and repair front fog lamp ground circuit as required.
3. Ineffective feed circuit. 3. Test and repair open front fog lamp feed circuit as required.
4. Ineffective switch. 4. Test and replace headlamp switch as required. Check TIPM for DTC's.
5. Ineffective instrument cluster inputs or outputs. 5. Use a diagnostic scan tool to test the instrument cluster inputs and outputs as required. Refer to the appropriate diagnostic information.
6. Ineffective TIPM inputs or outputs. 6. Use a diagnostic scan tool to test the TIPM inputs and outputs as required. Refer to the appropriate diagnostic information. Check TIPM for DTC's.
7. Ineffective CCN inputs or outputs. 7. Use a diagnostic scan tool to test the TIPM inputs and outputs as required. Refer to the appropriate diagnostic information. Check TIPM for DTC's.
8. Ineffective SCCM outputs. 8. Use diagnostic scan tool to diagnose LIN data bus. Refer to the appropriate diagnostic information. Check CCN for DTC's.
FRONT FOG LAMP DOES NOT EXTINGUISH. 1. Ineffective feed circuit. 1. Test and repair shorted front fog lamp feed circuit as required.
2. Ineffective switch. 2. Test and replace headlamp switch as required.
3. Ineffective CCN inputs or outputs. 3. Use a diagnostic scan tool to test the instrument cluster inputs and outputs as required. Refer to the appropriate diagnostic information.
4. Ineffective TIPM inputs or outputs. 4. Use a diagnostic scan tool to test the TIPM inputs and outputs as required. Refer to the appropriate diagnostic information.
5. Ineffective SCCM outputs. 5. Use diagnostic scan tool to diagnose LIN data bus. Refer to the appropriate diagnostic information. Check CCN for DTC's.
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