Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Interior Lights Dimming Schematics Connector End View Reference: Master Electrical Component List | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |
2 |
Do all dimming lamps operate properly? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
3 | Do any dimming lamps operate properly? | Go to Step 4 | Go to Step 5 |
4 | Test the I/P lamp supply voltage and ground circuits of the inoperative lamp, switch, or component for high resistance or an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 15 | Go to Step 9 |
5 | Test the I/P lamp supply voltage circuit of the body control module (BCM) for a short to ground. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 15 | Go to Step 6 |
6 | Test the I/P dimming control circuit of the headlamp switch for a short to battery positive voltage. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 15 | Go to Step 7 |
7 | Test the low reference circuit of the headlamp switch for a high resistance, or an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 15 | Go to Step 8 |
8 | Using a scan tool, command the instrumentation backlight dimming ON, and to full illumination. Do the dimming lamps illuminate? | Go to Step 10 | Go to Step 11 |
9 | Inspect for a poor connections at the harness connector of the inoperative switch, lamp or component. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 15 | Go to Step 12 |
10 | Inspect for a poor connections at the harness connector of the headlamp switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 15 | Go to Step 13 |
11 | Inspect for a poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 15 | Go to Step 14 |
12 | Replace the inoperative switch, lamp or component as necessary. Did you complete the replacement? | Go to Step 15 | -- |
13 | Replace the headlamp switch. Refer to Headlamp Switch Replacement . Did you complete the replacement? | Go to Step 15 | -- |
14 | Replace the BCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | 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 |
