Posted by dale kahler on December 19, 2013 at 06:49:55 from (65.127.84.74):
I recently replaced the generator for an alternator. Its a delco internally regulated 2-wire setup using a 2 1/2" pulley to keep the rpm in a proper range. The battery is charging at 14.6 volts, the ammeter is discharging when lights are turned on, engine on or off-normal. I have eliminated the internal regulator as usual and made sure the ground is solid. The ammeter pulses at any rpm above 800, as well as the lights slightly as expected. I know plenty of people who are familiar with this problem but no solution yet. I even tried running a temporary ground directly form the battery to the alternator to make sure the ground was solid, no difference. The alternator is a 37 amp and the ammeter is a 60 amp on a D17 allis chalmers. Any light you could shed on this would be greatly appreciated. Many thanks!!
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