I have things sorted out now after a few hours with Titan (great People) and a couple of schematics. Nothing wrong with the truck or the controler in the trucK. When it rains very hard and under some conditions the breakaway switch can fail -they have had a few-the small battery for the breakaway powers up the brakes-there is a hot wire from the truck and it starts to try and keep the breakaway battery charged, thus flattening the batteries. I had this -plus the control module which sits on the trailer tongue also filled with water-even though it has a gasket(told you it rained hard) Water poured out when I took it a part-2 days later the circuit boards are dry and things are double sealed and back together. The moral of the story is-unplugging your truck may not be enough-perhaps one should also unplug the breakaway battery as well. I'm going to!!!