GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2000 🢒 Grand Prix 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Interior Lights Dimming System Check

Step

Action

Normal Result(s)

Abnormal Result(s)*

1
  1. Turn OFF the IP dimmer switch.
  2. Turn the headlamp switch to the PARK position.

The following lamps are all in the ON position:

    • The steering wheel radio control switches
    • The headlamp switch
    • The IP lamp dimmer switch
    • The door lock switches
    • The window switches
    • The heater-A/C control
    • The instrument cluster
    • The ashtray lamp
    • The automatic transaxle control position indicator
    • The driver information center (DIC)
    • The fog lamp switch
    • The trip calculator
    • The driver seat heater switch
    • The vacuum fluorescent (VF) display (radio) step dim.

2

Slowly turn the IP lamp dimmer switch to HIGH.
  1. The brightness of the IP lamps slowly increase to high.
  2. The VF brightness of the radio slowly increases to high.

3
  1. Turn the IP lamp dimmer switch to the OFF position.
  2. Turn the park lamp switch to the OFF position.
    • The IP lamps turn OFF.
    • The radio lamps turn OFF.

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