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I forgot to say, at the HVAC control head.....When you pull off the trim cover around the radio and HVAC, it will be behind the cover, since the HVAC controls come off with the cover.

fourfourto: You are correct, the yellow wire will be hot in accy and run. However, in regard to a ground, since this is a new electronic receiver type device, the person should make a new ground just to be sure it is clean enough for the new module that was not designed in by the manufacturer.