Posted by Brownie 450 on March 21, 2009 at 06:30:44 from (216.51.158.151):
In Reply to: Farmall M overcharging posted by Shawn in PA on March 20, 2009 at 21:40:03:
Sounds like there is an open wire to the #2--battery voltage sensing terminal on the alternators regulator. It can't read the battery's voltage & assumes that the battery needs full charging current/ voltage. Try connecting a jumper wire from the positive terminal of the battery to the #2 terminal of the regulator while engine is running. This is the right-hand terminal as viewed from the rear of the alternator. If charging returns to normal, the problem has been found. If no change after this test, try a jumper from the negative battery post to the alternator frame. Let us know what the results are.
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