So, I don't have the heater wires in the mirror housing like others have said, and like another user said, there are only 3 pins in the male end (mirror end) of the plug. However, I checked that larger-gauge gray wire with a multimeter to ground (in fact I checked all of the wires) in the female end that comes from the door, and even with the rear glass heater turned on, none of the pins output any voltage. Does this mean that I cannot install heated side mirrors? I did check my fuses and there aren't any blown. And the rear window definitely heats up. Or is there something that I need to change using FORScan perhaps?
I would like to get new mirrors anyway because mine have a big hole in the trim from its past life as a police cruiser (mine is a 2013 FPIU Base). So I figured I might as well get heated ones (don't need anything fancy, but BLIS would be kinda nice if possible).
Anyone have any thoughts on what I could do or try?