My Uncle has recently purchased a Bass Tracker with Tracker Pro 50 HP motor. Today, when coming back in from fishing, we were running at full power and on plane, when we got a horn sounding from under the dash board, and then all power went away. No electrical to the motor, ignition switch, accessories, no raise/lower of the motor, etc. The trolling motor is on a separate circuit and battery, and operated properly. I am new to boat/motor electrical problems, but I looked at all the fuses I could find, and none of them were bad. I did not have a way of testing the continuity on the wires themselves, but all connections were secure...we simply had zero power from the battery to the switches or the dashboard. I am also not familiar with the horn that sounded, so any advice on what that was, and or any pointers as to what I can do to get this boat back in running order would be extremely appreciated.