Operation

OPERATION

When the rear window defogger switch is pressed to ON, the body control module (BCM) energizes the rear window defogger (EBL) relay. When the relay is energized, fused battery current is directed through the relay to the rear window defogger grid lines and to the heated outside rear view mirrors. An electric heater grid located behind the glass of each of the outside rear view mirrors produce heat to help clear the outside rear view mirrors of ice, snow, or fog.

If both outside mirror heating grids are inoperative, refer to Heated Glass Element Testing.

The heating grid behind each outside mirror glass cannot be repaired and the mirror glass must be replaced.