Interior Backlighting Inoperative
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
Interior Backlighting Inoperative Diagnostic Test
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Interior Lights Dimming Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems |
|||
| 1 | Did you perform the Lighting Systems Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Lighting Systems |
| 2 | Verify that the interior backlighting is inoperative. Does the interior backlighting operate normally? |
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Are all of the interior backlighting lamps inoperative? | Go to Step 5 | Go to Step 4 |
| 4 | Test for an open or high resistance in the following circuits. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems.
Did you find and correct a condition? |
Go to Step 10 | Go to Step 6 |
| 5 | Test for the following conditions. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems.
Did you find and correct a condition? |
Go to Step 10 | Go to Step 7 |
| 6 | Inspect for poor connections at the harness connector of the affected lamp. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 10 | Go to Step 8 |
| 7 | Inspect for poor connections at the harness connector of the body control module. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 10 | Go to Step 9 |
| 8 | Replace the affected lamp or internal lamp component. Did you complete the replacement? |
Go to Step 10 | - |
| 9 |
IMPORTANT:
Perform the setup procedure for the body control module (BCM). Replace the BCM. Refer to Body Control Module Replacement
in Body Control System.Did you complete the replacement? |
Go to Step 10 | - |
| 10 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 3 |