Interior Backlighting Does Not Dim
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 Does Not Dim
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Interior Lights Dimming 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 does not dim. Does the interior backlighting operate normally? |
Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
| 3 | Use the scan tool output controls to operate the interior backlighting. Can you control the dimming level of an activated control switch indicator with the scan tool? |
Go to Step 4 | Go to Step 5 |
| 4 | Test for an open, high resistance or short to ground in the following circuits. Refer to Circuit Testing
and Wiring Repairs
.
Did you find and correct a condition? |
Go to Step 10 | Go to Step 6 |
| 5 | Test for a short to voltage in the light emitting diode (LED) dimming circuit. Refer to Circuit Testing
and Wiring Repairs
. 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 headlamp switch. Refer to Circuit Testing
and Wiring Repairs
. 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
. Did you find and correct the condition? |
Go to Step 10 | Go to Step 9 |
| 8 | Replace the headlamp switch. Refer to Headlamp Switch Replacement . Did you complete the replacement? |
Go to Step 10 | - |
| 9 | Replace the BCM. Refer to Control Module References
for replacement, setup, and programming. 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 |