Wet carpet, passenger side

[austinrick]

When it rains pretty hard, I find water soaking the passenger side carpet. I can't see a trickle or source, but I also have the occasional leaf or two make their way through and onto that carpet. Can't see much up under the dash; is this something I can get to and fix? '93 XLT 3.0L auto w/a.c. -thanks

 

[Dirtman]

Third brake lights are a common cause of this. Doesn't make sense at first but the channel the water travels from a leak there leads directly to the passengers side floorboard.

 

[Alan_nc]

You sure you aren't just seeing it when it rains and it's there all the time....as in the heater core is leaking?

 

[franklin2]

Pull the carpet up as far as you can on the pass side and dry it and the floorboard out, will probably take a couple of days. Leave it rolled up over near the shifter and then you can usually look at the floor and see where the water is coming from. Mine was doing the same thing, and it ended up being my air plenum that is around the wipers and then goes down either side of the cab was rusted at the seam where it meets the floor. Right below where the computer is behind the pass side kickpanel. No way to get to it to fix it, but I smeared some roofing tar over the area and that stopped it believe or not. I was working on a 1986 ranger.