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A sure fire way to tell if your alternator is charging...start it up..pull the ground cable off the battery. If it dies...its not charging. Amperage output from the alternator is far more crucial than voltage. I have had them in the past put out 13.5 to 14.0 volts but wouldnt maintain a charge...it was only putting out about 3 amps when I had it tested.
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" If it wont break em loose in 3rd gear, it aint enough power "
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