Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Interior Lights Dimming Schematics | |||
1 | Did you review the interior lights dimming operation and perform the necessary inspections? | Go to Step 2 | |
2 |
Does the interior backlighting illuminate? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 |
Does the test lamp illuminate? | Go to Step 4 | Go to Step 13 |
4 | Connect a test lamp between the coil side voltage supply circuit of the marker lamp relay and the coil side control circuit of the marker lamp relay. Does the test lamp illuminate? | Go to Step 5 | Go to Step 12 |
5 | Probe the switch side voltage input circuit of the marker lamp relay with a test lamp that is connected to a good ground. Does the test lamp illuminate? | Go to Step 6 | Go to Step 14 |
6 | Connect a fused jumper wire between the switch side voltage input circuit of the marker lamp relay and the switch side output circuit of the marker lamp relay. Does the backlighting illuminate? | Go to Step 10 | Go to Step 7 |
7 |
Does the test lamp illuminate? | Go to Step 8 | Go to Step 15 |
8 |
Does the backlighting illuminate? | Go to Step 9 | Go to Step 16 |
9 | Probe the ground circuit of the IP dimmer switch at the IP cluster connector with a test lamp that is connected to battery positive voltage. Does the test lamp illuminate? | Go to Step 11 | Go to Step 17 |
10 | Inspect for poor connections at the marker lamp relay. Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 21 | Go to Step 18 |
11 | Inspect for poor connections at the IP cluster. Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 21 | Go to Step 19 |
12 | Inspect for poor connections at the headlamp switch. Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 21 | Go to Step 20 |
13 | Repair an open, high resistance, or short to ground in the coil side voltage supply circuit of the marker lamp relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 21 | -- |
14 | Repair an open or high resistance in the switch side voltage supply circuit of the marker lamp relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 21 | -- |
15 | Repair an open, high resistance, or short to ground in the backlighting voltage supply circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 21 | -- |
16 | Repair an open or high resistance in the backlighting dimming control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 21 | -- |
17 | Repair an open or high resistance in the ground circuit of the IP dimmer switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 21 | -- |
18 | Replace the marker lamp relay. Did you complete the replacement? | Go to Step 21 | -- |
19 | Replace the IP cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gages, and Console. Did you complete the replacement? | Go to Step 21 | -- |
20 | Replace the headlamp switch. Refer to Headlamp Switch Replacement . Did you complete the replacement? | Go to Step 21 | -- |
21 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
