Map-Light Rear-View Mirrors
These dim mechanically, like common RV mirrors.
POSSIBLE wiring:
Bk: ground
Wh: ground with open door (dome lamp trigger)
Or: battery (map light power)
Bk/Pk: ig.sw.? (dome cancel?)
I'm not sure about the bottom-switched mirror's wiring, but it's easy to pop the case apart, eliminate the PC board, and hard-wire the switches to work the way you want.
If the w/s mirror button is different, see this:
