Rear Defogger Switch - Description

DESCRIPTION









There are two switch locations for the front and rear window defogger (Electric Back Light) (EBL) depending on the vehicle build.

1. The switch can be located within the center bezel at the center of the instrument panel. (1,2)

2. The switch can be located within the Radio Receiver Module (RRM) U-Connect touch screen. Selecting CLIMATE (1) from the touch screen will bring you to the defogger touch button display (2,3) for both front and rear windshields at the top right of the screen.

When the rear window defogger switch is pressed to ON, a request signal is sent on the CAN Bus to the Body Control Module (BCM) to operate the EBL system. When the high side driver in the BCM is energized, current is directed to the rear defogger grid lines and to the heated side view mirrors, as equipped. An amber indicator illuminates in the switch to indicate when the EBL system is turned on. The U-Connect switch will light up Red when activated. The grid lines heat the glass to help clear the surface of fog or frost.