Circuit Operation - Interior Lights Dimming

PANEL DIMMING
Voltage is applied at all times through the RH Rear Power Distribution Center Fuse Block #1 PARK LP Fuse to the lamp Control Module. With the headlamps or park lamps on, voltage is applied through the Lamp Control Module, CKT 9, UP Fuse Block INT LP Fuse and CKT 32 to the Panel Dimming Control and the Dimmer Module(s). The Panel Dimming Control applies a variable control voltage to the Dimmer Module(s). The potentiometer in the Panel Dimming Control cannot provide enough current to operate the panel lamps. The Dimmer Module(s) amplifies the current and applies a variable voltage to the panel lamps. As the amount of current increases, the lamps become brighter. As the amount of current decreases, the lamps become dimmer.

PARADE DIMMING
The parade dimming feature prevents the dimming of the VF displays when daylight is sensed by the Lamp Control Module and the park lamps are turned on manually. If the Lamp Control Module senses that it is dark outside and the park lamps are on, it will allow the VF displays to be dimmer.