GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 1999 🢒 Grand Prix 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Dome, Cargo or Instrument Panel Courtesy Lamp Inoperative

Step

Action

Value(s)

Yes

No

DEFINITION: The IP courtesy lamp or door courtesy lamp does not turn on when the courtesy lights are on.

1

Was the Interior Lights System Check performed?

--

Go to Step 2

Go to Interior Lamps System Check

2

Was the BCM Diagnostic System Check performed?

--

Go to Step 3

Go to Diagnostic System Check - Body Control System in Body Control System

3

Is the IP Courtesy lamp inoperative?

--

Go to Step 4

Go to Step 5

4

Inspect the IP courtesy lamp bulb filament.

Is the IP courtesy lamp bulb filament open?

--

Go to Step 6

Go to Step 7

5

Inspect the door courtesy warning lamp bulb filament.

Is the door courtesy warning lamp bulb filament open?

--

Go to Step 11

Go to Step 12

6

Replace the IP courtesy lamp bulb.

Is the repair complete?

--

Go to Step 10

--

7
  1. Disconnect the IP courtesy lamp electrical connector.
  2. Turn the ignition switch from the OFF position to the RUN position.
  3. Turn the IP dimmer switch to the DOME position.
  4. Using a test light probe between the IP courtesy lamp harness connector terminal A and ground.

Does the test light illuminate?

--

Go to Step 8

Go to Step 9

8

Repair the poor connection or open in circuit 690.

Is the repair complete?

--

Go to Step 10

--

9

Repair the poor connection or open in circuit 1393.

Is the repair complete?

--

Go to Step 10

--

10
  1. Turn the ignition switch to the OFF position.
  2. Reinstall the connectors and components removed.
  3. Turn the ignition switch to the RUN position for 6 seconds.
  4. Turn the ignition switch to the OFF position.
  5. Remove the MALL PGM fuse.
  6. Turn the ignition switch to the ACC position. The BCM sounds the chime a number of times equivalent to the BCM type installed on the vehicle.
  7. Within one second, turn the ignition switch from the ACC position, to the OFF position, then back to the ACC position. The BCM sounds any DTCs stored.

Are there any BCM DTCs present?

--

Go to Diagnostic System Check - Body Control System in Body Control System

Go to Interior Lamps System Check

11

Replace the door courtesy warning lamp bulb.

Is the repair complete?

--

Go to Step 10

--

12
  1. Disconnect the door courtesy warning lamp electrical connector.
  2. Turn the ignition switch from the OFF position to the RUN position.
  3. Turn the IP dimmer switch to the DOME position.
  4. Use a test light in order to connect between the door courtesy warning lamp harness connector terminal A and ground.

Does the test light illuminate?

--

Go to Step 8

Go to Step 9