Not the best picture but the best I have right now. wiper hangs down a little bit and dosent wipe the entire rear windshield. Is it the linkage or what needs to be done?

 

Hell, at least yours works. You could pull the arm off and adjust the placement so that it wipes a bit more but it looks close to normal from what I remember when mine did work... Then again I bought it used and not sure that it worked normal for me...ever.

 

Pull the arm off and move it like two splines

 

How do you do that?

 

Lift arm and slide off, some have a little lock tab that a flat head will take care of