The passenger side front wiper is not working. It has been working in the past, but after a small icing a week ago, I turned on the wipers, and they both were a little stuck. I freed them, and then turned them on again, and only the driver side is working. Any thoughts on how to fix this?

 

that happend on my 94 dakota except for they both stopped and they were on cus it was pouring down rain and they both just got stuck at the top of there rotation. i stopped and put them down and it did nothing i ended up having to get a new motor for them. the gears in it were "stripped" or something they guy told me.