It may be your in line breaker coming from the battery. just a small grey square box. mine was bad and would just cut everything off all the sudden. turn the main power off then back on it might work might not. callled BCB they told me the breaker may be corroded causing it to short out. sent me a new breaker and im back in the game. to test this just un hook the wire on one side and put both wires on the same side. if it works then thats your problem. but i could also be wrong to. just sounds like what mine was doing.