GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

Important: The dome lamp does not turn ON when the courtesy lights are ON.

1

Did you perform the Diagnostic System Check?

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Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

Inspect the dome lamp bulb filament.

Is the dome lamp bulb filament open?

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Go to Step 4

Go to Step 3

3

  1. Disconnect the dome lamp electrical connector.
  2. Turn the ignition switch from the LOCK position to the RUN position.
  3. Turn the instrument panel (IP) dimmer switch to the DOME position.
  4. Connect a test light between the dome lamp harness connector terminal A and ground.

Does the test light illuminate?

--

Go to Step 5

Go to Step 6

4

Replace the dome lamp bulb.

Is the repair complete?

--

Go to Step 8

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5

Connect a test light between the dome lamp harness connector terminal A and terminal B.

Does the test light illuminate?

--

Go to Step 7

Go to Step 9

6

Repair a poor connection or an open in circuit 1732 between the dome lamp and S386.

Is the repair complete?

--

Go to Step 8

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7

Replace the dome lamp assembly.

Is the repair complete?

--

Go to Step 8

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8

  1. Turn the ignition switch to the LOCK position.
  2. Reconnect the connectors and reinstall the components that were removed.

Is the repair complete?

--

Go to Diagnostic System Check - Lighting Systems

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9

Repair a poor connection or an open in circuit 157 between the dome lamp and S387.

Is the repair complete?

--

Go to Step 8

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