For '81-83, relay #5 (from the front) is the power window relay. Part number is 911.615.109.01.

Try this.

- Pull fuse #21. It's the one closest to the back of the car. Do the windows still work? If so, someone has messed with the wiring.

-Put the fuse back in. Now put a piece of tape or mark the fuse that came out of #5 so you know which is which. Switch it with fuse #4. Try the power windows. Do they still work? They shouldn't.

Hi, I have a 80 911 SC and my driver side window works but my passenger side don’t. I replaced window regulator and tested the window motor and it works. Any idea what might cause the problem? Does the 82 diagram the for the 80?

Thanks.