Heated Exterior Mirror Operation

The rear window defrost switch controls operation of the heated exterior mirror glass. The heated exterior mirror glass only operates when the rear window defrost system is active. For a detailed description of the rear window defrost system operation, Refer to: Glass, Frames and Mechanisms - Vehicles With: One-Touch Open and Close Front Windows - System Operation and Component Description .

Based on messages received from the BCM through the MS-CAN, the DDM supplies voltage to the LH heated exterior mirror glass and the PDM supplies voltage and ground to the RH heated exterior mirror glass.