GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

1

Did you perform the Lighting Systems Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

Use the Scan Tool in order to command the courtesy lamps OFF.

Do the courtesy lamps turn OFF?

Go to Step 4

Go to Step 3

3

Test for a short to ground in the courtesy lamps control circuit (156). Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

System OK

Go to Step 7

4

Test for a short to ground in each door jamb switch circuit:

    • Circuit 394-Driver door
    • Circuit 395-Passenger door(s).

Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

System OK

Go to Step 5

5

Test each door jamb switch for proper operation. Refer to the following:

    • Open switch with the door closed
    • Closed switch with the door open

Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find a malfunctioning door jamb switch?

Go to Step 6

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

6

Replace the malfunctioning door jamb switch. Refer to Door Jamb Switch Replacement in Doors.

Is the repair complete?

System OK

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7

    Important: Perform the set up procedure for the body control module.

  1. Refer to Body Control Module (BCM) Programming/RPO Configuration .
  2. Replace the body control module. Refer to Body Control Module Replacement in Body Control System.

Did you complete the replacement?

System OK

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