Do a search for wipers not working or something like that, pop the hood and pull off the plastic panel (I think you have to maybe not) and snug up the bolts. They have worked themselves loose.....common issue.

Oh and have a beer!

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2001 4.4i Alpine White-Bone Stock
2001 Discovery II SE7 Black (A money pit)
1996 FJZ-80 Black (with some goodies)
1969 Firebird (work in progress)