Vacuum Fluorescent (VF) Dimming

The brightness of the Vacuum Fluorescent (VF) display is controlled by two signals, the park lamp signal (circuit 9) and the VF Dim signal (circuit 308). With the park lamps on, the VF display of the radio, PRNDL, driver information display (if equipped) and radio rear seat audio control (if equipped), will dim for night-time viewing. When the park lamps on signal is not present (park lamps are off), the VF display is at high brightness for daytime viewing. When the park lamps are on, the Headlamp and instrument panel lamp dimmer switch provides a dimming signal through circuit 8 which controls the brightness of the VF display when the Headlamp and instrument panel lamp dimmer switch is adjusted.