Heated Outside Rearview Mirrors

Battery positive voltage is supplied through the REAR DEFOG circuit breaker in the fuse block to the rear window defogger relay switch. With the ignition in the ON position, ignition 3 voltage is supplied through the HVAC fuse in the fuse block to the rear window defogger relay coil. When you depress the rear window defogger switch, the rear window defogger indicator illuminates and grounds the control circuit of the rear window defogger relay. This energizes the rear window defogger relay and allows battery positive voltage to the HTD MIR fuse (10A). The HTD MIR fuse provides battery positive voltage to the heated mirrors.