I GET WATER ON THE FOLLRBOARDS OF MY jEEP gRAND

Check the window seal

water on floor comes from 2 noteable areas one is a leaking heater radiator or hoses and second is the drain hose for the a/c is kinked broken or blocked. Sometimes in severe conditions leaves and dust build up in the plenum chamber ( that area with the grill in front of the windscreen and the drain hoses here rust out letting water into the cab. Most noticeable after rain

Do you have a sunroof?you might need to clean drain tubes.have you had a windshield replaced?or it could be a body seem.you will need to remove panels and lift up corner of the carpet and run the garden hose over the area and check for water in vehicle.

If you aren't loosing coolant, check the short stub hose on the engine side/passenger side of the firewall and make sure it's not obstructed. That is the drain for the a/c evaporator.

It sounds like the evaporator pan drain is plugged or worst case the evaporator is rutptured.Try clearing the drain,open hood and look on lower rightside of firewall for a very short rubber hose.Use small screwdriver and clean out hole.Hope it's just plugged.

First you have to determine where the leak is coming from. You could have a windshield leak and it is running down and collecting on the floor. The floor boards could be starting to rust out , a door seal could be bad. This is a problem that will take time and patience to find. Once you have determined where the leak is coming from then you can procede with the proper repairs.

Check the door weather stripping for rips. If it only leaks when driving, check the floorpan for rust holes.

The first place I would look is the floor board caps. Make sure one or more of them aren't pushed up, allowing water to enter the cabin. Also, because your defroster is probably on while it's raining, make sure the A/C drain plug isn't clogged. It's a small rubber fiting that sticks out from inside the firewall, behind the engine. Simply pull it out and clean it. When you pull it out, you might be surprised to see water coming out of the hole!

Just a couple things to check. I hope this helps! :)

-Jason

common problem with these roof racks check for loose bolts holding it on also there are inserts pressed into your roof under the roof rack these threaded insrts tend to come loose or get pulled out use silocone sealant around every bolt and insert.

The heater/airconditioner box under the dash has a drain hose to allow condensation to drain when the air conditioner is running. If this hose gets plugged, rain may accumulate in this box also (if it's raining heavily), as it comes in through the fresh air intake.

Look on the engine side of the firewall, probably on the passenger side, for a hose coming through the firewall that is not connected to anything. It is usually short, has a 90 degree bend, and the open end is down. Make sure that the end of this hose is not plugged.