the potentiometer thing sounds promising. I'm pretty sure I have the settings stored in the memory location correctly, even using the doorlock keypad the seat goes to the correct location. but these mirrors have a mind of their own! passenger side goes out and up to the extreme point and drivers side goes out and down to the extreme points. Knowing a little about servo systems, I was hoping that the mirrors had just lost a "home" position that could be corrected easily.