Chosen Solution
2010 Expedition - just replaced the wiper motor/linkage assembly - can’t get the passenger wiper arm to fit all the way onto the spline - causing it to spin even though the bolt is securely on. Does it require a tap or two with a rubber mallet. I’d hate to wack it and break something else!
See where this mechanic is pressing the blade to get it off. That may be where to press to help get it back on: https://www.youtube.com/watch?v=VomF4yqY…
