I have a '76 911 with power mirrors and had to get a wiring harness for the mirrors from the Porsche dismantler. The harness is from a newer car and the wires in the harness are different colors than what's coming out of the mirror, so it's very hard to figure out which wire connects to where. Here is a photo of my mirror motor. Can someone tell me which wire is:
Ground
Power
Directional