Got travel trailer that needed a little work. Had to replace some floor and walls in front above tongue /battery. Snipped a couple wires to reframe wall. Reconnected and finished everything up. (trying to keep it short). Now converter seems to be humming constantly and radio, water pump, and gauge will not work. Lights on gauge flash on for a second, same with radio. Could this just be from dead battery?? Problem occurs even when plugged in.