1995 Dodge Dakota Windshield Wiper on Driver Side Not Worki

I have a 1995 Dodge Daktota Sport Edition with a Magnum V6, none of that matters I'm sure cause my problems are with the Windshield Wipers and not the engine. Just a couple of days ago, the windshield wiper on the driver side was working when it came up and got stuck on the left side of my windshield, i pulled over in a safe place and put the wiper back on the windshield and put it back down. But now the wiper does not work anymore, i can see that the motor is still trying to move it. But it still won't move. Any ideas on whats wrong or how to fix it? Anything would help cause I went to a mechanic and they want $80 an hour to look at it. Thanks alot to anyone who can help me out.