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With the engine running, test the voltage of the battery using a voltmeter. You SHOULD be getting anywhere from 13.5 to 14.5 volts if the alternator is functioning properly. Turn on the headlights and rear window defroster and make sure you can hold the voltage level (you'll need someone to keep the engines at about 2000RPM's.

If the alternator isn't producing sufficient voltage, you either have a faulty alternator or the replacement was not connected properly.

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16y ago

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