Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Interior Lights Dimming Schematics | |||
1 | Did you perform the Lighting Diagnostic System Check? | Go to Step 2 | |
2 | Verify the fault is present. Does the system operate normally? | Go to Testing for Electrical Intermittents in Wiring Systems | Go to Step 3 |
3 | Turn ON the park lamps. Do the park lamps function properly? | Go to Step 4 | Go to Park Lamps Inoperative |
4 | Remove and inspect the ILLUM fuse. Refer to Testing for Short to Ground in Wiring Systems. Is the fuse open? | Go to Step 12 | Go to Step 5 |
5 |
Does the test lamp light? | Go to Step 7 | Go to Step 6 |
6 | Connect a test lamp (back probe) between the instrument panel lamps dimmer switch output circuit at the headlamp and panel dimmer switch and a good ground. Does the test lamp illuminate? | Go to Step 9 | Go to Step 13 |
7 |
Does the test lamp illuminate? | Go to Step 8 | Go to Step 10 |
8 | Connect a test lamp from between the instrument cluster ground circuit and a battery positive voltage circuit. Does the test lamp illuminate? | Go to Step 14 | Go to Step 11 |
9 | Repair the open in the instrument panel lamps dimmer switch output circuit between the switch and the fuse. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 15 | -- |
10 | Repair the open in the instrument panel lamp feed circuit between the fuse and the cluster. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 15 | -- |
11 | Repair the open in the instrument cluster ground circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 15 | -- |
12 |
Did you complete the repair? | Go to Step 15 | -- |
13 | Replace the headlamp and panel dimmer switch. Refer to Headlamp Switch Replacement . Did you complete the replacement? | Go to Step 15 | -- |
14 | Replace the instrument cluster, lights as needed. Refer to Instrument Cluster Bulb Replacement in Instrument Panel, Gauges and Console. Did you complete the repair? | Go to Step 15 | -- |
15 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
