Posted by Janicholson on October 04, 2010 at 17:33:21 from (67.72.98.45):
In Reply to: Alternator Wiring posted by TV Iron on October 04, 2010 at 17:14:32:
one wire system is basically always on. There is a redesigned internal regulator inside that needs voltage to excite the charging process. Some have substantial current draw 100+ milliamps, and will discharge a battery in a week or three to keep things from starting. Others are OK for months. They are not all created equal, and none are without some draw. An Hitachi from mid 1980s Nissan PU trucks, with the three wire setup (see Bob M diagrams) is a better bet. Alternators should be hooked up to the load side of the amp meter. (not the side attached to the starter switch) The power diode bridge in an alternator prevent reverse current of great magnitude from flowing backwards. If you want this one wire to be disconnected, put a 60 amp switch in the wire from the big terminal to the amp gauge. Turn on the switch to make charging happen. Turn off the switch when parked for a few days. Jim
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