Problem:
Passenger windshield wiper will not move anymore when tuned on. The driver side wiper will. Can anyone help to to find and fix this problem?

 

Try flipping up the cover at the lower end of the wiper arm. This is where the retaining nut for the wiper arm is. Pick the arm off the window and ensure the nut is tight. If it is loose, you may have to move the arm to its original location before you tighten it.
If this doesn't fix it, there is probably someting amiss with the linkage under the plastic trim panel at the base of the windshield. Good luck.

 

i just tightened mine 2 weeks ago.

Takes a metric socket. I cant remember the size off hand... i just kept reacjing into the socket case until one fit (10mm maybe?)