My passenger window stopped so I fiddled with it in naivety and stuffed that switch. I started playing with it again recently and developed a faulty master switch. But, when the power windows failed so did the power mirrors.

{ Pull the master switch out of it's pins and sockets from under the window buttons panel on the driver's door. )

Anyway, my fault is intermittent, and both windows and mirrors aren't operable together.
I have the wiring diagram, systems are combined.
They share the central fusebox - a blue wire is the mirrors getting around. They both go to a shared relay then. Then they depart with the blue going thru a resistor - then come together again onto the panel of the electric window main to the transistor, which is the shared part.

So, I might tap the transistor when my windows are stuck ...