Interior Backlighting Inoperative
Interior Backlighting Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Interior Lights Dimming Schematics (Pick Up) , Interior Lights Dimming Schematics (Utilities) | |||
| 1 | Did you perform the Lighting Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Lighting Systems |
| 2 |
|
Go to Testing for Electrical Intermittents in Wiring Systems | Go to Step 3 |
| 3 | Is only one lamp inoperative? | Go to Step 4 | Go to Step 6 |
| 4 | Test the instrument panel lamp supply voltage circuit of the inoperative lamp for high resistance or an open. Refer to Circuit Testing
, and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 17 | Go to Step 5 |
| 5 | Test the ground circuit of the inoperative lamp for high resistance or an open. Refer to Circuit Testing
, and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 17 | Go to Step 11 |
| 6 | Do the park lamps function properly? | Go to Step 7 | Go to Park Lamps Inoperative |
| 7 | Inspect the ILLUM fuse. Is the fuse open? |
Go to Step 12 | Go to Step 8 |
| 8 |
|
Go to Step 14 | Go to Step 9 |
| 9 | without disconnecting the switch, connect a test lamp between the instrument panel lamps dimmer switch signal circuit at the headlamp and panel dimmer switch and ground. Does the test lamp illuminate? |
Go to Step 13 | Go to Step 10 |
| 10 | Inspect for poor connections at the harness connector of the headlamp and panel dimmer 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 17 | Go to Step 16 |
| 11 | Inspect for poor connections at the harness connector of the inoperative 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 17 | Go to Step 15 |
| 12 |
|
Go to Step 17 | - |
| 13 | Repair the open in the instrument panel lamps dimmer switch signal circuit between the switch and the fuse. Refer to Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 17 | - |
| 14 | Repair the open in the instrument panel lamp supply voltage circuit. Refer to Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 17 | - |
| 15 | Replace the inoperative bulb. Did you complete the replacement? |
Go to Step 17 | - |
| 16 | Replace the headlamp and panel dimmer switch. Refer to Headlamp Switch Replacement . Did you complete the replacement? |
Go to Step 17 | - |
| 17 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 3 |