For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Interior Lights Schematics or Body Control System Schematics Connector End View Reference: Component Connector End Views
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle .
2 | Verify the rear compartment lamp is inoperative. Does the rear compartment lamp operate normally? | Go to Testing for Intermittent Conditions and Poor Connections . | Go to Step 3
3 | Are all overhead console lamps inoperative? | Go to Step 5 | Go to Step 4
4 | Test the voltage supply and ground circuits of the inoperative lamp for an open or high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | System OK | Replace the inoperative bulb.
5 | Are the overhead console lamps inoperative from a specific switch only? | Go to Step 6 | Go to Step 11
6 | Inspect the following related body control module (BCM) data parameters. Refer to Control Module References Inadvert Pwr Actv. Was a condition found? | Go to Step 7 | Go to Step 10
7 | Disconnect and test the switch of the affected input circuit for correct continuity in the open and closed positions. Refer to Testing for Continuity Is continuity correct in both positions? | Go to Step 8 | Go to Step 9
8 | Test the signal and ground circuits of the affected input circuit for the following conditions:

• | An open

• | A short to ground

• | High resistance

Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

System OK

Go to Step 10

9 | Inspect for poor connections at the harness connector of the affected switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | System OK | Replace the switch in the affected circuit.
10 | Inspect for poor connections at the harness connector of the module in the affected circuit. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | System OK | Replace the module in the affected circuit. Refer to Control Module References , for replacement, setup, and programming.
11 | Inspect for 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? | System OK | Replace the BCM. Refer to Control Module References , for replacement, setup, and programming.