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Driver side power window just dropped, will not go back up. All other windows and locks work. My first Volvo. I've seen this on D13 trucks i drive at work
sounds like the window regulator or the guides have failed or the bolts came lose. You need to pop off the door card to have a look. What year and model do you have?
do you get a voltage drop when actuating the switch? could be the motor failed, relay (circuit breaker?) or the switch if the regulator and rails looked ok. Sounds like you are on the right path.