Interior Backlighting Does Not Dim
WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. 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: Master Electrical Component List |
|||
| 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 | Do the instrument panel (I/P) lamps dim? | Go to Step 13 | Go to Step 4 |
| 4 | Do the class 2 lamps dim? | Go to Step 5 | Go to Step 6 |
| 5 | Test for a short to battery positive voltage in the I/P lamps supply voltage circuit. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 14 | Go to Step 13 |
| 6 | Disconnect the lamp switch assembly. Does all the illumination of the backlight components turn OFF? |
Go to Step 8 | Go to Step 7 |
| 7 | Test for a short to battery positive voltage on the I/P dimming control circuit. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 14 | Go to Step 8 |
| 8 | Test for a poor connection, an open or a short to ground in the I/P dimming control circuit. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 14 | Go to Step 9 |
| 9 | Test for a poor connection or an open in the I/P dimming return circuit. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 14 | Go to Step 10 |
| 10 |
|
Go to Step 13 | Go to Step 11 |
| 11 | Test for an open or a short to battery positive voltage in the I/P dimming voltage reference circuit. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 14 | Go to Step 12 |
| 12 | Replace the lamp switch assembly. Refer to Headlamp Switch Replacement . Did you complete the replacement? |
Go to Step 14 | - |
| 13 | Replace the BCM. Refer to Control Module References
for replacement, setup and programming. Did you complete the replacement? |
Go to Step 14 | - |
| 14 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 2 |