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I have a 69 chevelle and im haveing a charging problem ive replaced everything battery/ alt/ and regulator still wont go over 12 volts and with electic fan on or lights on its down to 11 voltsif i put the battery charger on it turn the key on (notrunning) it goes to 16 volts its driving me crazy please help thanks jim
 

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Be SURE that you have a good ground on the regulator. The mounting base of the regulator MUST be at the same potential as the alternator for everything to work properly. Since it mounts on the core support there's a chance this could be your problem. Be sure that there are good, clean ground straps from engine to chassis and body and NEG terminal on battery. You might also take a small wire brush and clean the contacts on the regulator 'plug'. I've seen these contacts corrode and cause problems.
 
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