The Stovebolt Site Forums The Shop Area The Electrical Bay regulator or alternator or .... ?

Sounds like you have a shorted diode or shorted stater in the alt. although they should show up when tested. Make shure the fan belt is tight & in good condition. These can slip under high loads. Beltfed is right, a voltmeter would tell you more. With the battery well charged hook the voltmeter across the bat or junktion block to ground. Run the engine up a little & it should go up to about 14 volts. Turn the lights on & it still should show 14 volts. Don't try to adjust the regulator as they are set at the factory for approx. 14 volts & that is normal setting. There is a way to bypass the regulator but if you have 2 different ones & they both do the same it,s time to look at the curcuit or the alt. If you like to tinker with stuff yourself they are not hard to o-haul if you have a good book. Used ones are a dime a dozen if you want to get another one for parts. Remans arn't that expensive if you want to get going & get it over with.