I have a DB35F that is not working and traced it a open thermostat wire. To verify this I connect both wire together and the unit started-up. The ends of this wire was bare and tiwisted together and inadvertently touched the positive battery buss bar. There was a small spark and the unit quit. The unit would not start again. I don't know what to do next. This on a boat with a 12v system.
Help!

Murray