Condensation under carpet, not from usual leak locations...

[wessidedabesside]

Here we go, another water under the carpet issue..  this has to be from condensation from cold metal being heated from the underside exhaust.

 

Ive replaced the two rear vents, after multiple rains its dry and no leaks.

Sealed the top antenna fin with 3m weatherstrip super sealant

AC drain tube is spewing water, and its dry under the passenger side carpet up into, under the dash..

Ive pulled the rear and passenger front carpet up, I leave them up to air out and for random investigating.

As of now, 3 zones are dry and clear except under the pass rear carpet which continues to get sopping wet if I lay the carpet back down.  I pulled it up one day last week and it was back sopping wet underneath.  Its clear, clean water, not rain or antifreeze.  No mildew or mold in the pad either, The only occasional smell is like old socks, but no mold or mildew smells yet.

 

My idea now is that its condensation, or a leak from a door strip..  but how can condensation get so sopping wet is beyond me while all the other zones under carpet are dry and clear.

This carpet must not be breathable either as once that padding gets wet it either never, or takes forever to dry out even when propped up.  You have to vacuum that water out of the pad.

Anything else I can check?  If it is condensation, has anyone installed a heat shield underneath, or laid down some sound deadening/heat shielding matting?  I have some of that amazon siless sound deadening I can put down, but that stuff is gooey sticky so once its down, it'll be a nightmare to remove.

 

Could installing some vent drain plug in the metal floorboard help?  Maybe put holes in the carpet for it to air out??  Getting frustrated here.  No rust YET.  Thanks for any advice.

 

[JimCost2014]

That was a lot to read, so maybe I missed it, did you mention the 3rd brake light housing? Headliner stained, or discolored anywhere?

[wessidedabesside]

no stains, and ive already removed, cleaned, and resealed the 3rd light just in case..  wasnt wet, corroded or anything in the cavity..

 

checked again, and its sopping wet again this time in the front pass side and rear pass side.

I'm kinda frustrated at this point as I haven't drove it for the exhaust to heat up and cause what I thought was condensation..  Its something very different now.  I'm left to remove the pass seat, air out the carpet, and inspect the pass side pillar and door seals now.  Its rained once, last week and very humid damp mornings where water could leak down into holes..

 

the water is odd, its not a pool of water like i discovered the first time, its water droplets in various spots.  But the pad is sopping wet from what I'm assuming front to back on the pass side.

 

[JimCost2014]

Windshield? Factory sunroof? 

 

There also have been reports of the cab seams coming apart on the roof.

[AndrewD]

A couple thoughts you could check. 

1: Does your truck have the sliding rear window, or has the rear glass been replaced?

2: have you inspected the weather stripping on the door and window on that side?

 

I had this similar issue with water intrusion on my last truck and found out it was due to lazy work when the shop replaces the back glass. They did not put the sealant on well enough and I would get a wet floor when it rained. The only way I finally found it was with a helper w/a hose and me sitting in the fruck watching/looking around to see where it finally came in.