Hi there,
You may need to re set the wiper arm position, with the wipers off and in the parked position (down) remove the arm of the suspect wiper, take off the lower nut on the arm and give it a wiggle it should pop off, check the serrations on the drive and see of the arm is in good condition where it fits on to the pivot, re fit arm in parked position and tighten up, the pivot may be slipping due to a loose nut or worn mounting point, look her first.
Mark (mhpautos)
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Tuesday, May 11th, 2010 AT 11:34 PM