For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Interior Lamps System Check? | -- | Go to Step 2 | Go to Interior Lamps System Check
2 |

1. Disconnect the suspect door jamb switch connector.
2. Connect a fused jumper between the appropriate jamb switch connector cavity and ground:

• | Left front door: cavity A (BLK)

• | Right front door (Oldsmobile): cavity D (DK BLU)

• | Right front door (Buick): cavity B (YEL)

• | Rear doors: cavity A (DK BLU)

Do all of the courtesy lamps light?

--

Go to Step 3

Go to Step 4

3 | Test CKT 151 (BLK/WHT) for an open. Refer to Testing for Continuity in Wiring Systems. Is CKT 151 OK? | -- | Go to Step 5 | Go to Step 7
4 | Inspect the appropriate circuit for an open or short to voltage:

• | Left front door: CKT 155 (DK BLU)

• | Right front door (Oldsmobile): CKT 49 (DK BLU)

• | Right front door (Buick): CKT 528 (YEL)

• | Rear doors: CKT 49 (DK BLU)

Refer to Testing for Continuity in Wiring Systems.

Is the CKT OK?

--

Go to Step 6

Go to Step 7

5 | Replace the suspect door jamb switch. Refer to Door Lock Actuator Replacement or Rear Side Door Lock Actuator Replacement in Doors. Is the repair complete? | -- | Go to Interior Lamps System Check | --
6 | Replace the body control module (MALL). Refer to Body Control Module Replacement in Body Control System. Is the repair complete? | -- | Go to Interior Lamps System Check | --
7 | Repair the suspect wiring. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Interior Lamps System Check | --