Posted by Jon Hagen on March 02, 2011 at 14:12:56 from (69.26.23.96):
In Reply to: Re: SIO Alt. posted by sam in mo on March 02, 2011 at 04:48:45:
That "Cutout" connected to the F terminal may be an early Chrysler mechanical alternator regulator(60-67) They work pretty well on a Delco 10DN like yours. It should not charge hard at all times unless the battery is low/ bad / shorted, or the Chrysler regulator is defective,not connected (mounting bracket) to a good ground or the switched 12V power to it has some resistance and voltage drop. Check voltage at the battery posts with the alt charging, it should not / must not be over 14.9 volts.
The chrysler mechanical voltage regulator has only two terminals, the one with a screw goes to the alternator F terminal. The flat blade quick connector terminal goes to switched 12V power from the ignition switch. Make sure this regulator connection is made before, not after any ignition ballast resistor. If this connection is made on the downstream(coil) side of a ballast resistor, it will send a false low voltage signal to the regulator and cause the alternator to charge flat out all the time. (make sure there is atleast 12V at the flat blade terminal of the regulator with the engine running.
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