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 | Open each of the doors. Do all of the courtesy lamps illuminate when you open each door? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3
3 | Are the courtesy lamps inoperative from one door only? | Go to Diagnostic Starting Point - Vehicle Access | Go to Step 4
4 | Are all of the courtesy lamps inoperative? | Go to Step 7 | Go to Step 5
5 | Test for an open or high resistance in the inoperative courtesy lamp voltage supply circuit. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 8 | Go to Step 6
6 | Test for an open or a short to battery positive voltage in the courtesy lamp low control circuit. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 8 | Go to Step 7
7 | Replace the body control module (BCM). Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 8 | --
8 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2