Interior Backlighting Inoperative
WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
Interior Backlighting Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Interior Lights Dimming Schematics or Body Control System Schematics Connector End View Reference: Lighting Systems Connector End Views or Data Communication Connector End Views |
|||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 | Verify that the interior backlighting is inoperative. Does the interior backlighting operate normally? |
Go to Testing for Intermittent Conditions and Poor Connections | 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 of the inoperative lamp. Refer to Circuit Testing
and Wiring Repairs
.
Did you find and correct a condition? |
Go to Step 13 | Go to Step 8 |
| 5 | Is the TBC 2A Fuse in the I/P fuse block open? | Go to Step 6 | Go to Step 7 |
| 6 | Test the battery positive voltage circuit of the body control module (BCM) for a short to ground. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 13 | Go to Step 10 |
| 7 | Test for the following conditions. Refer to Circuit Testing
and Wiring Repairs
.
Did you find and correct the condition? |
Go to Step 13 | Go to Step 9 |
| 8 | Inspect for poor connections at the harness connector of the affected lamp. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 13 | Go to Step 11 |
| 9 | Inspect for poor connections at the harness connector of the BCM. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 13 | Go to Step 12 |
| 10 | Repair the controls illumination lamps dimming control circuit for a short to ground. Refer to Wiring Repairs
. Did you complete the repair? |
Go to Step 13 | - |
| 11 | Replace the affected lamp or internal lamp component. Did you complete the replacement? |
Go to Step 13 | - |
| 12 | Replace the BCM. Refer to Control Module References
for replacement, setup, and programming. Did you complete the replacement? |
Go to Step 13 | - |
| 13 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 3 |