Another window question. (1995)

[Shells]

Well, after searching and reading through the results, I'm still not sure, so any help would be appreciated. Here's the situation.

I bought the car and the windows didn't work. No big deal. I search around and learn that the amplifier is a common problem, so I buy one used on eBay. While I'm waiting for shipment to arrive, I pull the panels and discover the previous owner pulled the window motors. Those might be helpful. So, I bought some window motors from some guy on here. I installed them. Driver's side - great. Passenger side - ehh, worked off and on.

The passenger side has become the main problem now. It started out working most of the time, then somtimes, then rarely, now not at all. When I get the window up, it will roll down no problem. It has a problem with "up" though. I swapped out the amplifier with the eBayed one I got and both windows worked great for about two minutes. Just as I was about to shut the car off and call it a day, the passenger side stopped rolling up again.

So, now that I've replaced the window motor AND the amplifier, I'm kind of at a loss. First of all, is there anything else it could be? If not, it would seem that one of the parts I bought as a replacement is bad. Any idea which one for sure?

Thanks.