GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

DEFINITION: The following lamps do not turn on when the interior courtesy lights and the interior lamps override switch are on (interior courtesy lights enabled):

    • The dome lamp
    • The cargo lamp
    • The instrument panel (IP) courtesy lamp

1

Did you perform the Interior Lights System Check?

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Go to Step 2

Go to Interior Lamps System Check

2

Inspect the lamp bulb filament.

Is the lamp bulb filament open?

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Go to Step 4

Go to Step 3

3

  1. Disconnect the lamp electrical connector.
  2. Turn the ignition switch from the LOCK position to the RUN position.
  3. Turn the IP dimmer switch to the DOME position.
  4. Turn on the interior lamps override switch (the interior courtesy lights are enabled).
  5. Use a test lamp in order to connect between the lamp harness connector terminal A and ground.

Did the test lamp light?

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Go to Step 5

Go to Step 6

4

Replace the lamp bulb.

Is the repair complete?

--

Go to Step 7

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5

Repair the following conditions in CKT 690:

    • A poor connection
    • An open

Did you complete the repair?

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Go to Step 7

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6

Repair the following conditions in CKT 328:

    • A poor connection
    • An open

Did you complete the repair?

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Go to Step 7

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7

  1. Turn the ignition switch to the LOCK position.
  2. Reinstall any connectors or components that you removed.
  3. Turn the ignition switch to the RUN position for 6 seconds.
  4. Turn the ignition switch to the LOCK position.
  5. Remove the BCM PRGRM fuse.
  6. Turn the ignition switch to the ACC position.
  7. The BCM sounds the chime a number of times equivalent to the BCM type installed on the vehicle.

  8. Within 1 second, turn the ignition switch from the ACC position to the LOCK position, then back to the ACC position.
  9. The BCM sounds any DTCs stored.

Are there any BCM DTCs present?

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Go to Diagnostic System Check - Body Control System

Go to Interior Lamps System Check