my 1995 ford f150 has a leak coming from the above the rear view mirror i thought it was the windsheild at first but i had it tested and it doesn't leak i don't know where the water comes from

 

probably a top spot on the windshield that really need to be soaked to leak inwards, try clear or black silicone across the top edge of the windshield and see how it seals it up

 

A good way to check the truck would be to remove the headliner and trim panels, take it to a car wash and see where it's coming from. Also, remove the windshield trim pieces and redo to sealant around the glass. Does the truck have a sunroof?

 

i have the head liner down and i see a hole in the drip rail seal