GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 1999 🢒 Firebird 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Interior Lamps System Check

Step

Action

Normal Result(s)

Abnormal Result(s)*

1
  1. Turn off the IP dimmer switch.
  2. Turn off the left and right inside rearview mirror courtesy/reading lamps.

    3. Turn the ignition switch to the RUN position.

  3. Lower the driver's door window in order to prevent lockout.
  4. While observing the courtesy lights, open and close all the vehicle doors, and the rear compartment lid, one at a time.
    • The courtesy lamps turn on when any door is open.
    • The courtesy lamps turn off when all doors are closed.

2
  1. Close all the vehicle doors.
  2. While observing the courtesy lights, turn on the IP dimmer switch.
  3. Turn off the IP dimmer switch.
    • The courtesy lamps turn on when the IP dimmer switch is in the ON position.
    • The courtesy lamps turn off when the IP dimmer switch is in the OFF position.

3
  1. Turn the ignition switch to the OFF position.
  2. Open a vehicle door, then close the door.
  3. Observe the courtesy lamps.
    • With delayed illumination enabled, the courtesy lamps turn off approximately 25 seconds after the doors are closed.
    • If delayed illumination feature is disabled, the courtesy lamps turn off after the last door is closed.

4
  1. Turn the ignition switch from OFF to RUN, then back to OFF.
  2. Open a vehicle door, then close the door.
  3. While observing the courtesy lamps, turn the ignition switch to the RUN position within 25 seconds after closing the door.
  4. Turn the ignition switch to the OFF position.
  5. Open a vehicle door, then close the door.
  6. While observing the courtesy lamps, press any power door lock switch to the LOCK position within 25 seconds after the door is closed.
    • With delayed illumination enabled, courtesy lamps turn off immediately when the ignition switch is turned to the RUN position, or when pressing LOCK on a power door lock switch.
    • With delayed illumination disabled, the courtesy lamps turn off when the door is closed.

5
  1. Close all the vehicle doors.
  2. Turn the ignition switch to the RUN position, the to the OFF position.
  3. While observing the courtesy lights, remove the key from the ignition switch.
    • With the exit lighting feature enabled the courtesy lights turn on for 5 seconds after the key is removed from the ignition switch.
    • With the exit lighting feature disabled, the courtesy lights stay off when the key is removed from the ignition switch.

6
  1. Close all the vehicle doors.
  2. Turn off the IP dimmer switch.
  3. Turn the ignition switch to the RUN position.
  4. Turn on, then turn off the switches for the inside rearview mirror courtesy/reading lamps.
    • The inside rearview mirror courtesy/reading lamps turn on when switches are on.
    • The inside rearview mirror courtesy/reading lamps turn off when switches are off.

7

Open, Then close the IP compartment while observing the IP compartment lamp.
    • The IP compartment lamp turns on when the IP compartment is open.
    • The IP compartment lamp turns off when the IP compartment is closed.
    • The IP compartment lamp remains on at all times. Replace the IP compartment lamp. Refer to Instrument Panel Compartment Lamp Replacement .
    • The IP compartment lamp does not illuminate. Refer to Instrument Panel Compartment Lamp Inoperative .

* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.