Vacuum Fluorescent (VF) Dimming
WARNING: This page is about a different car, the 2002 Pontiac Montana, 2002 Oldsmobile Silhouette, and 2002 Chevrolet Venture. However, it is still accessible from the selected car via links, so may be relevant.
The brightness of all the vacuum florescent displays is determined by a variable voltage signal produced by the dimmer switch and sent through the step dim circuit. With the parklamps activated, the following components will dim for night time viewing:
- The VF display of the radio
- The HVAC module
- The driver information display (if equipped)
- The radio rear seat audio control (if equipped)
When the step dim signal is not present, the VF display is at its high brightness for daytime viewing. When the parklamps are on, the dimmer switch provides a dimming signal through the step dim signal circuit. This controls the brightness of the VF display when the dimmer switch is adjusted.