For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Interior Lights Schematics Connector End View Reference: Master Electrical Component List
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 always ON. Does the rear compartment lamp operate normally? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3
3 | Test for a short to voltage on the rear compartment lamp supply voltage circuit and for a short to ground on the rear compartment lamp ground circuit. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | System OK | Go to Step 4
4 | 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 5 | Go to Step 9
5 | Disconnect and test the switches 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 6 | Go to Step 7
6 | Test the signal circuits of the affected input switches for a short to ground. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | System OK | Go to Step 8
7 | 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 malfunctioning switch in the affected circuit.
8 | 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.
9 | 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.