Interior Backlighting Inoperative
WARNING: This page is about a different car, the 2004 Buick Regal and 2004 Buick Century. 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 Connector End View Reference: Master Electrical Component List in Wiring Systems |
|||
| 1 | Did you perform the Lighting System 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 | Are all of the incandescent backlighting lamps inoperative? | Go to Step 5 | Go to Step 4 |
| 4 | Is only one of the incandescent backlighting components inoperative? | Go to Step 9 | Go to Step 11 |
| 5 | Check the PANEL DIMMING fuse for an open. Is the PANEL DIMMING fuse open? |
Go to Step 20 | Go to Step 6 |
| 6 |
|
Go to Step 7 | Go to Step 19 |
| 7 |
|
Go to Step 8 | Go to Step 16 |
| 8 |
|
Go to Step 12 | Go to Step 17 |
| 9 |
|
Go to Step 10 | Go to Step 15 |
| 10 | Using a test lamp connected to battery positive voltage, probe the ground circuit of the inoperative component. Does the test lamp illuminate? |
Go to Step 13 | Go to Step 18 |
| 11 | If the vacuum florescent lighting does not illuminate in a component, determine if the component is operating properly. Refer to the appropriate Description and Operation:
Does the component operate properly |
Go to Step 13 | Go to Step 14 |
| 12 | Inspect for poor connections at the harness connector of the headlamp switch. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 23 | Go to Step 21 |
| 13 | Inspect for poor connections at the harness connector of the inoperative component or bulb. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 23 | Go to Step 22 |
| 14 | Refer to the appropriate procedure:
Did complete the repair? |
Go to Step 23 | - |
| 15 | Repair a high resistance or an open in instrument panel lamps dimmer switch signal circuit of the inoperative component. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 23 | - |
| 16 | Repair a high resistance or an open in the instrument panel lamps dimmer switch signal circuit of the headlamp switch. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 23 | - |
| 17 | Repair a high resistance or an open in the instrument panel lamp fuse supply voltage -1 circuit of the headlamp switch. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 23 | - |
| 18 | Repair a high resistance or an open in the ground circuit of the inoperative component. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 23 | - |
| 19 | Repair a high resistance or an open in the park lamps switch on signal circuit. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 23 | - |
| 20 | Repair a short to ground in the instrument panel lamp fuse supply voltage - 1 circuit or the instrument panel lamps dimmer switch circuit. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 23 | - |
| 21 | Replace the headlamp switch. Refer to Headlamp Switch Replacement in Instrument Panel, Gages, and Console. Did you complete the repair? |
Go to Step 23 | - |
| 22 | Replace the inoperative component or bulb. Did you complete the repair? |
Go to Step 23 | - |
| 23 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 2 |