| 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 fog lamp relay control rear circuit if required. |
| 4. Incorrect BCM configuration. |
4. Use a diagnostic scan tool to check and correct the BCM configuration settings if required. Refer to the appropriate diagnostic information. |
| 5. Ineffective BCM inputs or outputs. |
5. 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 fog lamp relay control rear circuit if required. |
| 2. Ineffective BCM inputs or outputs. |
2. Use a diagnostic scan tool to test the BCM inputs and outputs. Refer to the appropriate diagnostic information. |