For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle
2 | Place the room lamp switch in the ON position. Does the room lamp illuminate? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3
3 |

1. Disconnect the room lamp assembly.
2. Probe the courtesy lamp supply voltage circuit with a test lamp that is connected to a good ground.

Does the test lamp illuminate?

Go to Step 4

Go to Step 6

4 | Connect the test lamp between the courtesy lamp supply voltage circuit and the courtesy lamp low control circuit. Does the test lamp illuminate? | Go to Step 5 | Go to Step 7
5 | Inspect for poor connections at the harness connector of the room lamp assembly. Did you find and correct the condition? | Go to Step 9 | Go to Step 8
6 | Repair an open, high resistance in the courtesy lamp supply voltage circuit. Did you complete the repair? | Go to Step 9 | --
7 | Repair an open or high resistance in the courtesy lamp low control circuit. Did you complete the repair? | Go to Step 9 | --
8 | Replace the room lamp assembly. Did you complete the replacement? | Go to Step 9 | --
9 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3