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Message: <blockquote data-quote="MaxW" data-source="post: 57611" data-attributes="member: 7705"><p>Actual reverse polarity hooked up to any vehicle designed for a negative ground will fry the alternator and any other electronics that contain solid state components (transistors & diodes). Is it possible someone converted this machine to a positive ground? Not very likely. Although I have not personally seen it, I understand there are conditions where a battery that has been completely drained can be reversed charged. When you recharged the battery every day, did you hook the charger up with the negative on the block? Pull the battery and check the polarity with a meter. If it is reversed it is garbage. I would also pull the alternator and have it tested. It's very likely it has been damaged. Do the 743's have computers or control boxes?</p></blockquote><p></p>