GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Interior Lights Schematics

Connector End View Reference: Master Electrical Component List

DEFINITION: Courtesy lamps are inoperative from the key fob.

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2

  1. Turn OFF the ignition.
  2. Lock all of the vehicle doors.
  3. Close all of the vehicle doors.
  4. Wait 20 seconds.
  5. Press the unlock button on the remote keyless entry transmitter.

Do the courtesy lamps illuminate?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

Does the driver door unlock?

Go to Step 4

Go to Symptoms - Vehicle Access

4

Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 6

Go to Step 5

5

Replace the BCM. Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 6

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6

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3