GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

Important: The instrument panel (IP) lamp or the door courtesy lamp does not turn ON when the courtesy lights are ON.

1

Did you perform the Interior Lights System Check?

--

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

Inspect for DTCs.

Are any DTCs present?

--

Go to Diagnostic Trouble Code (DTC) List/Type

Go to Step 3

3

Is the IP courtesy lamp inoperative?

--

Go to Step 4

Go to Step 10

4

Inspect the IP courtesy lamp bulb filament.

Is the IP courtesy lamp bulb filament open?

--

Go to Step 5

Go to Step 6

5

Replace the IP courtesy lamp bulb. Refer to Instrument Panel Courtesy Lamp Bulb Replacement .

Is the repair complete?

--

Go to Step 9

--

6

  1. Disconnect the IP courtesy 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. Connect a test light between the IP courtesy lamp harness connector terminal A and ground.

Does the test light illuminate?

--

Go to Step 7

Go to Step 8

7

Repair a poor connection or an open in circuit 1450 between the IP courtesy lamp and S230.

Is the repair complete?

--

Go to Step 9

--

8

Repair a poor connection or an open in circuit 1732 between the IP courtesy lamp and S242.

Is the repair complete?

--

Go to Step 9

--

9

  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

--

10

Inspect the door courtesy lamp bulb filament.

Is the door courtesy lamp bulb filament open?

--

Go to Step 11

Go to Step 12

11

Replace the door courtesy lamp bulb.

Is the repair complete?

--

Go to Step 9

--

12

  1. Disconnect the door courtesy light 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. Connect a test light between the door courtesy lamp harness connector terminal A and ground.

Does the test light illuminate?

--

Go to Step 13

Go to Step 14

13

Repair a poor connection or an open in circuit 156 between the IP courtesy lamp and S214.

Is the repair complete?

--

Go to Step 9

--

14

Repair a poor connection or the open in circuit 1732 between the IP courtesy lamp and S242.

Is the repair complete?

--

Go to Step 9

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