So, good news and bad news, I fixed it but I don't know how.

I pulled the window regulator and found nothing wrong. Then took the motor off and plugged it in, it works both ways. I put the motor back onto the regulator, it tested good in both directions. Now I am putting the car back together and a black plastic clippoy thing is missing that the screw goes through the truck on the regulator and then through the glass and into a nut that has the glass/metal contact point protected by plastic. Anyway, one of the plastic pieces fell off somewhere. But, the cable on the regulator is good, and the motor is good.

I need Item 7, here. I tried to make my own, then the missing part fell from somewhere and I used it over again. I'm guessing that a small piece of plastic became lodged in the cable pulley.

https://www.realoem.com/bmw/enUS/sho...diagId=51_3896