Hey, I've been having the same problem too. I got a switch at pull a part and it works the same way, down fine and part way up then stops. My brother the cars previous owner told me that he's replaced the switch 2 or 3 times .. when I push the switch I can here a click ,click sound like the motor is trying to work. Could it still be the switch ? I just ordered a regulator/motor off Amazon a Dorman part it was $71 bucks. I'm thinking about taking the switch I got at the scrapyard and seeing if it will work after cleaning it.
Mark