| BACKUP LAMP DOES NOT ILLUMINATE |
1. Ineffective or missing bulb. |
1. Test and replace backup lamp bulb as required. |
| 2. Ineffective ground circuit. |
2. Test and repair backup lamp ground circuit as required. |
| 3. Ineffective feed circuit. |
3. Test and repair open back-up lamp feed circuit as required. |
| 4. Ineffective switch. |
4. Test and replace backup lamp switch (manual transmission) or transmission range sensor (automatic transmission) as required. |
| 5. Ineffective TIPM inputs or outputs. |
5. Use a diagnostic scan tool to test the TIPM inputs and outputs. Refer to the appropriate Diagnostic Information. Check TIPM for DTC's. |
| BACKUP LAMP DOES NOT EXTINGUISH |
1. Ineffective feed circuit. |
1. Test and repair shorted back-up lamp feed circuit as required. |
| 2. Ineffective switch. |
2. Test and replace backup lamp switch (manual transmission) or transmission range sensor (automatic transmission) as required. |
| 3. Ineffective TIPM inputs or outputs. |
3. Use a diagnostic scan tool to test the TIPM inputs and outputs. Refer to the appropriate Diagnostic Information. |