Mirror Heated Does Not Operate (Interlocked With Rear Defogger and Wipers)

MIRROR HEATER DOES NOT OPERATE (INTERLOCKED WITH REAR DEFOGGER AND WIPERS)

CIRCUIT DESCRIPTION

The mirror heater operates when the following conditions are met: 1.the A/C amplifier sends the rear defogger switch signal through the multiplex communication line to the multiplex network door ECU front LH and RH (driver and passenger door ECU), and 2.the deicer function is operating.