I'm not too sure but I know those door switch clusters relay information to other control units. That might be a clue.
There is also a function you can run with a factory scan tool which may help fix your mirrors. It is called parameterization, and another called a vehicle handover, these two should be run before replacing any parts.
If that doesn't work...
Assuming you've checked ALL the fuses in the left and right sides of the dash board, it might be worth replacing the switch assembly.
Click Here for a link to the switch.