Every time it rains the drivers side floor is wet. The waterappears tooriginate in the right corner near the seat.

 

My car did the same thing, I got to looking around under the car and found that a plug type of hole was there and somthing had hit and bent it out of shape. Its like for running electric wiring or somthing into the cab from outside of the car? not sure why they are there. I cleaned it up real well and gooped silicone all around the plug thingy and it seems to keep the water out.