Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Interior Lights Dimming Schematics | |||
1 | Did you review the backlighting operation and perform the necessary inspections? | Go to Step 2 | |
2 |
Do the illumination lamps operate normally? | 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 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 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 |
Does the test lamp illuminate? | Go to Step 14 | Go to Step 9 |
9 | Connect a test lamp (back probe) 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 |
Did you complete the repair? | 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 |
