Rear Defogger Switch - Description

DESCRIPTION





The switch for the rear window defogger (Electric Back Light) (EBL) system (2) is integrated into the A/C-heater control (1), located in the center of the instrument panel. When the rear window defogger switch is pressed to ON, a request signal is sent on the CAN Bus to the Totally Integrated Power Module (TIPM) to operate the EBL system.

When the high side driver in the TIPM is energized, current is directed to the rear defogger grid lines and to the heated side view mirrors, as equipped. An amber indicator (3) illuminates in the switch to indicate when the EBL system is turned on. The grid lines heat the glass to help clear the surface of fog or frost.