Interior Lamps Dimming

The I/P dimmer switch controls the brightness of the incandescent lamps and Vacuum Fluorescent (VF) displays. The incandescent lamps are located in various components (see schematics) and the VF displays are located in the radio and instrument cluster (SEO).

Incandescent Dimming
The brightness of the incandescent lamps is determined by a variable voltage signal produced by the I/P dimmer switch.

Vacuum Fluorescent (VF) Dimming
The brightness of the Vacuum Fluorescent (VF) displays is controlled by two signals: the park lamps on signal (circuit 308) and the VF dimming signal (circuit 230.) With the park lamps on, the VF display of the radio, and the instrument cluster (SEO) will dim for low light viewing. When the park lamps on signal is not present (park lamps off), the VF displays are at high brightness for daytime viewing. When the park lamps are on, the I/P lamp dimmer switch provides a signal (VF Dimming Signal circuit 230) which controls the brightness of the VF displays when the I/P dimmer switch is adjusted.