I recently removed the windshield wiper assembly (arms, motor, etc.) to inspect it because it was blowing a fuse every time I switched the wipers on. I cleaned everything (the car was stationary for 3 years so things have rusted shut...rust in the motor seemed to be one of the things killing the fuses). I reinstalled everything and the fuses aren't blowing anymore, but the wipers are getting stuck. The spines are turning but it looks like the motor can't get the rubbery blades to budge. Anyone had this problem before? What'd I break?

Thanks from me and from Lily, the hapless beetle that ended up in my garage!
(I'm David's daughter and I live in Germany right now but I can't wait to show off my finished beetle when I'm back in the US!)