Looking through the manual and the mirrors and windows don't have much in common at all. I would suggest you are looking for two problems. You say the fuses are good but is there power there?? If your rear trunk release works the mirror fuse is ok. The only thing in common I can think of is broken wires in the door jam area but that would just affect one side. You are looking for something affecting both mirrors and both power windows. Access switches and see if you have power on orange wire terminal A for power mirrors and power with key on pink wire going into window switches.
Just looked again at the manual and they do have a ground in common. G301 located at upper RH shroud.
so here is what I would do. at the power mirror switch. access the black wire at terminal B (splice in a new ground) and give it a dedicated ground to the body and see if that fixes it.
