An astute reader was kind enough to offer his suggestions on the proper way to test an alternator:
First, unplug the two wire connector on the alternator. Then connect a jumper wire from the positive battery terminal to the “F” terminal on the alternator. Start the engine. Using a volt meter, test to see if the battery is charging (usually a minimum of 13.5 volts). If the battery is charging, the problem is with the regulator or the wiring. If it is not charging, your alternator is faulty.
First, unplug the two wire connector on the alternator. Then connect a jumper wire from the positive battery terminal to the “F” terminal on the alternator. Start the engine. Using a volt meter, test to see if the battery is charging (usually a minimum of 13.5 volts). If the battery is charging, the problem is with the regulator or the wiring. If it is not charging, your alternator is faulty.
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