passenger qtr panel window will not go up, hear motor running. can i fix this on 1992 Ford Mustang LX

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with the motor running I pulled the window up into place.
would this be the regulator or the motor failing?
(1) Answer
As a general rule, if you can hear the motor running, then all you need is a regulator. It's also a good statistical bet. Here at the shop we probably replace a dozen regulator for every one window motor that fails.