Boat is a 1986 Thundercraft with a 140 mer I/O. Battery has a drain to it when ignition is off. Battery is new and been tested, Alternator is new and tested. Pulled all the fuses to accessories still test light goes on meaning there is still a drain to battery. Followed all the lines. can seem to locate the problem. The only time the test light will go out is when I remove the two wire regulator clip out of the side of the alternator. Red wire there has a 12 volt reading. purple wire has a O volt reading ignition is off. Please give me some ideas this is a real puzzle. What could be draining the system???<br /><br />Thanks to all,<br /><br />Chiboka