Ok, had heavy rains last few days and when I went to get back into truck the floor was soaked with almost 1" of water on the passenger side.... where in the world is all this water coming from?!? I've been checking everywhere and can't seem to find where it's leaking from... don't have access to a hose to test with. Any ideas?

door hinges are perfect, fresh air door closed... vents clear, only think I can possibly think of is maybe the roof rack or around the windshield, or maybe the evap drain being clogged..... haven't quite got the fender off to check that yet...

 

That often happens when the Cowl side drains are plugged with leaves, etc. Water comes in the heater intake

 

I've got the cowl covers off and all is clear....

 

Cowl Side Drains....Where are these located? I have the same leaking happening and was wondering as well. I pulled all my plastic off and could see anything.
Thanks,

 

He!! if I know.. but heavy rain/water going in there must go somewhere.

Also Ford Fox platforms had a body caulk problem around the heater intake in the eighties. By the time the owner found the problem it had rusted out.. Looked like there was a leak near the Pass side A pillar because it traveled over and ran down behind the kick panel.

Note... I recall reading a guy finding rust-out under windshield trim on an older blazer.

Just some ideas.. but standing water in a footwell doesnt come from a small leak

 

Well I think I found the leak.... Looks like the plenum drain had cracked sealant in the corner due to a ridge of sealant in the corner... what a pain in the *** to get to.. almost had the whole fender off for this one.... Sealed it up with some blue rtv.. we'll see how it holds up and if in fact it was the problem.

 

Hey coolasice did that fix your leak? I got the same problem and my TCCM is getting wet. Seems water is backing up thru the recirc vent just above the TCCM passengers side. I see water seeping out of a seam just below that plenum drain.

 

Removed my inlet air vent and a few bolts in the passenger inner fender well. I was able to access the inlet air drain thru the fender well and it was plugged up with pine needles. Used a shop vac in blower mode to clear it out. Attached some pics. Hope it fixes the leak. The leak runs out the recirc vent down the harness and into the TCCM. No wonder all those TCCMs have corroded connectors. All the junkyard TCCMs I found had corroded connections and case. My TCCM fried from this leak.