First off let me tell you about my electrical system. I have an exide supercrank sc30lfa 28ah 445cca battery a tpe rebuilt stator and a shindengen fh012aa r/r. That being said when my cooling fan runs for a while my voltage begins to drop I know electric motors can build up resistance over time and draw more current. I am going to test my fans amperage draw with a dmm and an old car battery this afternoon and was wondering if anyone else had ever checked this or if their voltage drops this dramatically with the fan on. It draws enough current that i have to bump the idle up to keep it running.