Rear Fog Lamps

NOTE:

For vehicles so equipped, the rear fog lamps are designed to operate ONLY while the front fog lamps are illuminated. If the front fog lamps do not illuminate, diagnose and repair that problem before attempting to repair the rear fog lamp system. Refer to the appropriate diagnostic information.

CONDITION	POSSIBLE CAUSES	CORRECTION
REAR FOG LAMP DOES NOT ILLUMINATE	1. Ineffective or missing bulb.	1. Test and replace rear fog lamp bulb if required.
	2. Ineffective ground circuit.	2. Test and repair open rear fog lamp ground circuit if required.
	3. Ineffective feed circuit.	3. Test and repair open rear fog lamp relay output circuit if required.
	4. Ineffective or missing relay.	4. Test and replace rear fog lamp relay if required.
	5. Ineffective EMIC (CCN) inputs or outputs.	5. Use a diagnostic scan tool to test the EMIC (CCN) inputs and outputs. Refer to the appropriate diagnostic information.
	7. Incorrect BCM configuration.	7. Use a diagnostic scan tool to check and correct the BCM configuration settings if required. Refer to the appropriate diagnostic information.
	8. Ineffective BCM inputs or outputs.	8. Use a diagnostic scan tool to test the BCM inputs and outputs. Refer to the appropriate diagnostic information.
REAR FOG LAMP DOES NOT EXTINGUISH	1. Ineffective feed circuit.	1. Test and repair shorted rear fog lamp relay output circuit if required.
	2. Ineffective relay.	2. Test and replace rear fog lamp relay if required.
	3. Ineffective EMIC (CCN) inputs or outputs.	3. Use a diagnostic scan tool to test the EMIC (CCN) inputs and outputs. Refer to the appropriate diagnostic information.
	4. Ineffective BCM inputs or outputs.	4. Use a diagnostic scan tool to test the BCM inputs and outputs. Refer to the appropriate diagnostic information.