05 Itasca Horizon. Had found a wet spot on the wall and floor behind the passenger seat. Thought I had solved the problem by sealing where the wires for the door awning entered. Last night we had a very heavy rain (3") in 1 hour, so this morning we checked for leaks and only found 1. The same spot behind the passenger seat, just rear of the seat belt anchor post at the floor and wall. Wall feels wet a foot up and the carpet is also very wet. This time I found it. At the bottom of the A&E electric awning arm is where the electric enters the coach, but you can't see it. Remove the 2 screws that hold the bottom end cap on and you can see the hole. It originally had caulk in it, but long gone! The plastic insert that hides the wire in the arm funnels the water directly to the hole in the coach wall. I drilled a drain hole in the cap, filled the hole with wet/Dry sealer. Could apply to any coach with the A&E electric awning