The Heated Outside Rearview Mirrors receive electrical power through operation of the Rear Window Defogger and the Defogger relay. Operation of the rear window defogger relay provides B+ through the Heated Mirrors fuse in the RH IP Accessory Wiring Junction Block and then to the heated mirror supply side feed circuit. The ground for the heaters is provided through G 301 (LH) and G 302 (RH).