Step | Action | Yes | No | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Schematic Reference: Interior Lights Schematics | |||||||||||||||
1 | Did you perform the Lighting Systems Diagnostic System Check? | Go to Step 2 | |||||||||||||
2 | Verify that the courtesy lamps are always on. Do the courtesy lamps operate normally? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 | ||||||||||||
3 | Disconnect the courtesy lamp relay from the body relay block. Did the courtesy lamps remain illuminated? | Go to Step 10 | Go to Step 4 | ||||||||||||
4 | Inspect for the following related BCM data parameters as applicable. Refer to Scan Tool Data List and Scan Tool Data Definitions for typical values and definitions:
Was a problem found? | Go to Step 6 | Go to Step 5 | ||||||||||||
5 | Test the courtesy lamp relay control circuit for a ground signal at the relay socket. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Was a ground signal present? | Go to Step 9 | Go to Step 12 | ||||||||||||
6 | Disconnect and test the switch of the affected input circuit for proper continuity in the open and closed positions. Refer to Circuit Testing in Wiring Systems. Does the switch operate properly? | Go to Step 7 | Go to Step 8 | ||||||||||||
7 | Test the signal and ground circuits of the affected input circuit for a short to ground, open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 14 | Go to Step 9 | ||||||||||||
8 | Inspect for poor connections at the harness connector of the affected switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 14 | Go to Step 11 | ||||||||||||
9 | Inspect for poor connections at the harness connector of the BCM. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 14 | Go to Step 13 | ||||||||||||
10 | Repair the short to ground in the courtesy lamp low control circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 14 | -- | ||||||||||||
11 | Replace the switch in the affected circuit. Refer to one of the following replacement procedures as applicable:
Did you complete the replacement? | Go to Step 14 | -- | ||||||||||||
12 | Replace the courtesy lamp relay. Refer to Relay Replacement in Wiring Systems. Did you complete the repair? | Go to Step 14 | -- | ||||||||||||
13 |
Important: Perform the setup procedure for the BCM. Replace the body control module (BCM). Refer to Body Control Module Replacement in Body Control System. Did you complete the replacement? | Go to Step 14 | -- | ||||||||||||
14 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 | ||||||||||||
