Here are all the movements with pin numbers and wire colors (from the DMC color schematic):
Left Mirror:
Up/Down – pin 6 (White/Purple) and pin 8 (White/Green)
In/Out – pin 3 (White/Brown) and pin 11 (White)
Right Mirror:
Up/Down - pin 6 (White/Purple) and pin 9 (White/Blue)
In/Out – pin 3 (White/Brown) and pin 10 (White/Red)
So, the left and right (In/Out) movement of the mirrors are shown above. Note that pin 3 is common to both sides for In/Out movement. For example, to test the In/Out movement of the driver (left) side, apply +12 to pin 3 and Ground (Negative) to Pin 11. Verify the mirror moves. Then reverse the polarity and apply +12 to pin 11 and Ground (Negative) to Pin 3, mirror should move the opposite direction. Similarly, use pins 3 and 10 to test the right side mirror In/Out movement.
Delorean Mirror Control.jpg
If the mirrors move as expected then the issue is likely with the mirror power switch. If jumpering results in no movement, suspect wiring, connectors, or mirror motors.
Ron