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Q: Passenger side wiper arm does not move on 2005 Chevrolet Equinox

While using the wiper blades, passenger side just stopped moving. It's in the "down" position, fortunately, but I can't seem to figure out how to access the armature operation. I've tried removing the plastic cover inside the hood by removing the plastic "pop rivets," but it appears that the wiper arms must be removed too in order to access the armature operation. I removed the rounded nut which "appears" to fasten the wiper arm to "whatever" moves it, but even then, I can't pull the wiper arm off to get the plastic cover off.

Am I chasing my tail or was I close to getting an opportunity to see what is up!?!
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You may need a special puller to remove the wiper arms if you can't wiggle them off. I think that you'll find that the splined part that the arm attaches to is stripped internally, just a guess.
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Thanks Superbob; I'll see if I can determine IF the "splined part" is stripped before I try to tackle the plastic covers again! This repair may very well be beyond my limited capabilities!
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