No, that would be a bad idea. The rear defogger is on a timed circuit. The antennae is a constant circuit. This means you can overheat the rear window and run the risk of fracturing the glass from too much heat.
Did you check the fuse for the rear defogger?
Make sure the fuses to the HVAC system in the fuse panel have power on both sides with the key on. The control head for the AC module controls the activation of the rear defroster and also controls the time based on ambient temperature.
The heater and A/C programmer receives the rear defogger request from the heater and A/C control assembly. The heater and A/C programmer will then send a Class 2 message to the body control module (SBM). The SBM will control the rear defogger on/off status and the amount of time that the rear defogger is on. The SBM will communicate the rear defogger status to the heater and A/C programmer over the Class 2 serial data and the heater and A/C programmer will light the rear defogger indicator accordingly.
Friday, January 11th, 2019 AT 5:44 AM