A Florida summer means rain. And that also means my back window is leaking really bad. I've got those famous cloth seats that stain when any water touches them so I have to clean them weekly. Anyone know what is causing this leak or what I can do to stop it? My third brake light is fine so I don't think its coming in that way. Also its all along the rear window, but more on the passenger side.

Thanks.

 

I would put some extra silicone under that third light even thou it looks fine and around the back window seal, that would take care of your problem.
Also , make sure there is no crack on third break light lens.

 

to do it right you need to pull the rear window and replace the butyl tape seal.

 

Im having that same rear window leak. I Plan on calling a glass place to get it fixed.

 

I've had this problem as well. I replaced my third brake light a while ago and I haven't had a problem since.

 

My leak was both actually, but ive already fixed the 3rd brake light.

 

My view on the F150 is that there are 3 common problems which extend to beyond normal wear and tear - leaking front window which allows rain to fry the electronics, blowing spark plugs and, leaking rear windows.

Ford doesn't do anything but try and hide the issues.

I finally gave up on Ford and proudly display a "Ford Sucks" sign which appears to get my problem out there to others who can then decided if they want to buy.

If you want to see the poster and the story, go to:

http://fordf150news.wordpress.com