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Re: Farmall B alternator/ammeter
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Posted by Bob M on August 01, 2007 at 06:45:43 from (151.190.254.108):
In Reply to: Farmall B alternator/ammeter posted by Dave H (MI) on July 31, 2007 at 19:21:54:
Dave - As John T mentions it's not unusual for an old ammeter to stick with the hand in the center position. A quick test is to bring a small magnet near the ammeter face then move the magnet around. If the ammeter hand is free it will deflect left/right as the magnet is moved around. But since the battery is going dead it sounds like also the alternator is not working. Could be it's wired wrong (the fact the ammeter does not show discharge as the battery runs down suggests this). Could also be the alternator itself is bad. Best test would be to remove the alternator and take it to the nearest NAPA, AutoZone or local starter/generator shop. They can put it on a test stand and in about 30 seconds can you whether the alternator is functional. If it's determined the alternator is OK then be looking for a wiring problem. And if not it's time to replace the alternator!
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