Backup Lamps Inoperative
WARNING: This page is about a different car, the 2004 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
Backup Lamps Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Exterior Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems |
|||
| 1 | Did you perform the Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Lighting Systems |
| 2 |
|
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Is only one lamp inoperative? | Go to Step 9 | Go to Step 4 |
| 4 | Do the INTERIOR lamps dim normally? | Go to Step 6 | Go to Step 5 |
| 5 |
|
Go to Step 8 | Go to Step 7 |
| 6 | Test the backup lamps voltage supply circuit for a short to ground or an open. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 11 | Go to Step 8 |
| 7 | Test the CHMSL/BACKUP Fuse voltage supply circuit for a poor connection open or an short to ground. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 11 | Go to Step 10 |
| 8 |
IMPORTANT:
Perform the setup procedure for the BCM. Refer to Body Control System Schematics
in Body Control System. Replace the BCM. Refer to Body Control Module Replacement
in Body Control System.Did you complete the repair? |
Go to Step 11 | - |
| 9 | Repair the open or the high resistance in the inoperative backup lamp power supply or the ground circuit. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 11 | - |
| 10 | Replace the accessory wiring junction block. Refer to Junction Block Replacement - Accessory Wiring
in Wiring Systems. Did you complete the repair? |
Go to Step 11 | - |
| 11 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 2 |