Like others have said, make sure all connections are good and remove the battery cables and make sure they are not corroded. Clean the battery posts. Put your voltmeter on the field wire going to the alternator and see if it fluctuates too. If it is still fluctuating you can eliminate the voltage regulator with a 7 ohm high wattage resistor hooked to the battery and to the field terminal. If it now shows a steady charge, your voltage regulator is bad. Auto Zone will check your alternator for free from what I hear. I don't know if they check voltage regulators or not.
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Today's Featured Article - Women and Tractors - More Views From the Farmer's Wife - by Teri Burkholder. The top ten reasons why the judges wouldn't let you participate in the stock antique tractor pull: Hey, this is stock! It came with that V8 in it! That "R" on my tires stands for "really old" not radial! Blue gas? We thought it was a pretty color! What wire hooked to my throttle?
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