Switch, Defogger: Operation

The rear window defogger (Electric Back Light/EBL) system is actuated by a momentary switch located in the Integrated Center Stack (ICS), or by using the control located in the Uconnect® touchscreen module. When a rear window defogger switch is pressed, the Heating, Ventilation and Air Conditioning (HVAC) module energizes the EBL relay in the rear Power Distribution Center (PDC) and fused battery current is directed to the rear window defogger grid lines and the heated outside rear view mirrors, when equipped. The grid lines heat the glass to help clear the rear window and outside mirror surfaces of fog or frost.

An amber indicator lamp in the ICS illuminates when the EBL system is ON. The HVAC module contains the EBL system control circuitry, including the timer logic.

The EBL system automatically turns OFF after an initial programmed time interval of about 10 minutes, as long as the ignition is left in the RUN position. If a rear window defogger switch is pressed again after the initial time interval has expired, the EBL system will automatically turn OFF after about five minutes. The EBL system will also turn OFF if the ignition is turned to any position other than RUN, or by manually pressing the rear window defogger switch a second time.

The individual rear window defogger switch located in the ICS cannot be adjusted or repaired. If a rear window defogger switch or indicator lamp is inoperative or damaged, the entire ICS must be replaced. Refer to MODULE, INTEGRATED CENTER STACK (ICSM), REMOVAL .

The individual rear window defogger switch located in the Uconnect® touchscreen module cannot be adjusted or repaired. If a rear window defogger switch is inoperative or damaged, the entire Uconnect® touchscreen module must be replaced. Refer to RADIO, REMOVAL .