For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Interior Lights Dimming Schematics
1 | Did you review the interior lighting description and operation and perform the necessary inspections? | Go to Step 2 | Go to Symptoms - Lighting Systems
2 |

1. Place the headlamp switch in the PARK position.
2. Operate the Instrument Panel (IP) lamps dimmer switch.

Do the instrument panel lamps operate properly?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3 |

1. Place the headlamp switch in the OFF position.
2. Disconnect the IP lamps dimmer switch.

Do the instrument panel lamps remain illuminated?

Go to Step 4

Go to Step 5

4 | Inspect for poor connections at the harness connector of the IP lamps 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 7 | Go to Step 6
5 | Repair a short to voltage on the instrument panel lamp supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 7 | --
6 | Replace the I/P Dimmer Switch. Refer to Headlamp Switch Replacement . Did you complete the replacement? | Go to Step 7 | --
7 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3