Okay, so I'm fiddling around the other day and notice a rust spot on my drivers side dash and discover a drip off a fastener overhead. This was after getting caught in a downpour a few days earlier. Got out the flashlight, looked up overhead in the cabinets, behind the TV but no obvious sign of where the moisture could be coming from. Also found a damp area below the A pillar like it may have run down that way too.
So hear is the question: Any tried and true methods for locating a roof leak? The bus was parked so I doubt it's coming from a windshield.
Anyone care to share some knowledge?