I haven't started yet, but what I'm planning is since I'm almost positive that I have the wiring in the mirror plug for the heated portion I'm gonna run some wire and tap into those wires, tap
In to an ignition source for power so when the truck is of the mirrors are off in case I forget them on. I'm going to wire ire in a fuse holder and use a 10A fuse, and probably use either 12 or 18 gauge wire. My switch placement is going to be right beside the cigarette lighter. These are the switches I'm using.