This is a complete Mirror Controller Swap for a Grand Wagoneer, Wagoneer and possibly other Full-Sized Jeeps (FSJ). The Upgraded Mirror Controller is from a 93-95 Grand Cherokee (Specifically in this video from a 1994 Grand Cherokee)
This is a complete tear down, clean and rebuild of a 1987 Grand Wagoneer Power Mirror Controller Switch. I was able to make the switch work again. The weak link is the center section which the adjusting knob is pressed into, this piece is made of a material that is brittle and over time and use cracks and breaks apart, rendering the adjusting knob useless because it is no longer attached. This might work for your controller switch or similar controller switches, it also might not.