Step | Action | Value(s) | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
Schematic Reference: Interior Lights Dimming Schematics | ||||||||||
1 | Did you perform the Lighting Systems Diagnostic System Check? | -- | Go to Step 2 | |||||||
2 | Do the incandescent lamps dim properly? | -- | Go to Step 3 | |||||||
3 | Turn ON the ignition, with the engine OFF. Do the VF displays operate properly? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 4 | ||||||
4 | Is the HVAC control module VF display inoperative? | -- | Go to Step 5 | Go to Step 11 | ||||||
5 |
Does the voltage measure near the specified value? | 54 V | Go to Step 8 | Go to Step 6 | ||||||
6 | Test the 54V VF display supply circuit for the following conditions:
Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 12 | Go to Step 7 | ||||||
7 | Inspect for poor connections at the harness connector of the instrument cluster (IPC). 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 12 | Go to Step 9 | ||||||
8 | Inspect for poor connections at the harness connector of the HVAC control module. 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 12 | Go to Step 10 | ||||||
9 | Replace the instrument cluster (IPC). Refer to Instrument Cluster Replacement in Instrument Panel, Gages and Console. Did you complete the replacement? | -- | Go to Step 12 | -- | ||||||
10 | Replace the HVAC control module. Refer to HVAC Control Module Replacement in HVAC Systems - Automatic. Did you complete the replacement? | -- | Go to Step 12 | -- | ||||||
11 | Replace the component with inoperative VF displays. Refer to one of the following:
Did you complete the replacement? | -- | Go to Step 12 | -- | ||||||
12 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 | ||||||
