I have a 1999 Super Duty. It has a cab water leak. It is coming in through a body seam on the back of the cab on the passenger side. The seam runs down boths sides of the cab just under the rear window. I Used a garden sprayer and sprayed the body seam on the passenger side. It starts leaking about halfway. This is right between the cab and the bed where you can't get to it. I thought that there might be some Ford bodymen on here that has come across it before. I have found that other guys are having similiar problems with their trucks. Any ideas on how I would fix this?

Before I found out it was the bodyseam I upgraded the weather stripping and had the rear window slider replaced.

This is a picture of the seam inside the cab passenger side. The black strip is some kind of sealer that Ford uses. The water will though seam about halfway and it comes out at the bottom..