For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Interior Lights Dimming System Check? | -- | Go to Step 2 | Go to Interior Lights Dimming System Check
2 |

1. Disconnect the panel dimmer switch connector.
2. Turn the headlamp switch to the PARK position.
3. Connect a test lamp between terminal C and terminal D of the instrument panel dimmer switch connector.

Does the test lamp light?

--

Go to Step 3

Go to Step 4

3 | Connect a fused jumper between terminal B of the panel dimmer switch connector and ground. Are the interior lamps lit? | -- | Go to Step 5 | Go to Step 6
4 | Repair the open in CKT 151 between the panel dimmer switch and ground splice pack G202. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Interior Lights Dimming System Check | --
5 | Use a fused jumper in order to backprobe the lamp dimmer module connector between terminal B and ground. Do the interior lamps turn off? | -- | Go to Step 7 | Go to Step 8
6 | Replace the panel dimmer switch. Refer to Instrument Panel Lamp Dimmer Switch Replacement in Instrument Panel, Gauges, and Console. Is the repair complete? | -- | Go to Interior Lights Dimming System Check | --
7 | Repair the open or short to B+ in CKT 44 between the panel dimmer switch and the lamp dimmer module. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Interior Lights Dimming System Check | --
8 | Replace the lamp dimmer module. Refer to Instrument Panel Lamp Dimmer Switch Replacement in Instrument Panel, Gauges, and Console. Is the repair complete? | -- | Go to Interior Lights Dimming System Check | --