I believe that it is the motor, on the drivers side window.
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1999 Plymouth Prowler Question: drivers window
Answer #1DaveJHM March 06, 2011, 15:50Master
If the window has failed, the motor and/or regulator will need to be replaced. This is not a "do it yourself" job, as the access is poor, the sheet metal is sharp, and you need a large rivet gun to fasten the components. I would recommend seeing a qualified technician. Here is a link to some shops near you.