Don't know what year truck you have. Don't know what all you have as far as ignition system. Sounds like you, or someone, did not convert to 12V properly.
The side terminal has nothing to do with saving a 12V coil in a 12V system. It is part of a bypass system that saves the points on a 12V, points motor with foot start.
Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn
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