Rear Defogger Switch - Operation

OPERATION

The rear window defogger (Electric Back Light) (EBL) system is actuated by a momentary switch located in the switchbank, or by using the control located in the U-Connect Touch (TM) screen module. When a rear window defogger switch is pressed to on, the A/C heater module energizes the EBL relay in the 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 switchbank illuminates when the EBL system is on. The A/C heater module contains the EBL system control circuitry, including the timer logic.

NOTE: The EBL system turns off automatically after ten minutes of initial operation. Each following activation cycle of the EBL system will last five minutes.

The EBL system automatically turns off after an initial programmed time interval of about ten minutes, as long as the ignition is left in the Run position. If a rear window defogger switch is pressed to on 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 switchbank cannot be adjusted or repaired. If a rear window defogger switch or indicator lamp is inoperative or damaged, the entire switchbank must be replaced Instrument Cluster Switch Pod - Removal.

The individual rear window defogger switch located in the U-Connect Touch (TM) screen module cannot be adjusted or repaired. If a rear window defogger switch is inoperative or damaged, the entire U-Connect Touch (TM) screen module must be replaced.