The 50 amp circuit breaker on my Minn Kota V2 keeps immediately tripping when I plug in the trolling motor. MK customer service said the wiring is bad between the battery and the plug. I can't find a nick, cut or broke wire anywhere that I can see or feel. It is factory installed wiring on a 2012 Lund. I jumpered from the TM plug to the CB. It sparked and fried the CB. Does this mean the short is in the TM?