L4-2.4L,My wind shield wipers wont work but i hear the motor but the wipers wont move

My wind shield wiper stop working this morning i hear the motor but the wiper wont move and im not sure if its the snow and ice or is because i need a new wiper or a new wind shield motor? I asked my shop to look at it and they wanted 120 just to look at it and i dont want to replace the motor if thats not the problem

My car has 129000 miles.
My car has an automatic transmission.