the door lock motors can be a bit of a pain. I am going to do the fix my self soon.
If you google a bit, you'll find a good fix for the Ford door lock motors.
Even if you just want to change them, it show's how to remove them.
As for the mirrors, are you sure it is the motors?
It could be the switch. Another member emailed me a few pages from the shop manual on trouble shooting the mirrors. Send me a pm if you want a copy.
1999 F-150 XLT
1994 Bronco XLT