New member here. I do not own a Jeep but I work on a 97 Grand Cherokee from time to time. Recently I looked at the wet carpet problem that many seem to have. I removed the seats, passenger side front and back, lifted the carpet and found a pool of water. I removed about a gallon of water and the carpet took over a week to dry. Not sure how long this has been going on.
In addressing the problem I followed TSB 24-06-96
More info on this:
The drain was clear so this was not the problem. I finally decided that the AC drain was allowing water to enter the cabin. The water was seeping in thru the firewall and running down from the drain housing. The AC drain runs horizontally. When the water slowly drains, it runs along the bottom of the drain and enters the cabin thru the firewall. Add to this normal movement of the vehicle and you can get lots of water in. The seal around the drain is just some foam. I found this foam to be deteriorated.
I tried sealing around the drain housing but water still entered. The best way to check for this is to place a paper towel around the drain housing. If water is seeping in, the towel gets wet.
I finally decided to fix this leak as I fixed a similar leak in my truck. In my truck, I placed a hose on the drain and let it droop down. So now no water gets in. The Jeep is a bit harder. The Jeep engineers decided that no one should see nor touch the AC drain. It is sealed inside a frame rail by the passenger wheel well. I took some measurements and located this buddy. See the pictures. Not sure how to post these pictures so I will do a couple per post.
There it is