GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

The dome lamp does not turn on when the courtesy lights are on.

1

Was the Interior Lights System Check performed?

--

Go to Step 2

Refer to Interior Lamps System Check

2

Was the BCM Diagnostic System Check performed?

--

Go to Step 3

Refer to Diagnostic System Check - Body Control System

3

Inspect the dome lamp bulb filament.

Is the dome lamp bulb filament open?

--

Go to Step 5

Go to Step 4

4

  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 6

Go to Step 7

5

Replace the dome lamp bulb. Refer to Dome Lamp Bulb Replacement.

Has the repair been made?

--

System OK

--

6

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

Does the test light illuminate?

--

Go to Step 8

Go to Step 10

7

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

Has the repair been made?

--

Go to Step 9

--

8

Replace the dome lamp assembly. Refer to Dome Lamp Assembly Replacement.

Has the repair been made?

--

Go to Step 9

--

9

  1. Turn the ignition switch to the LOCK position.
  2. Reinstall the connectors and the components that you removed.

Have all the repairs been made?

--

Refer to Interior Lamps System Check

--

10

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

Has the repair been made?

--

Go to Step 9

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