On most modern vehicles, the voltage regulator is internal to the alternator. Some manufacturers use the engine computer instead of a traditional voltage regulator to maintain proper alternator voltage. Typically an output between 13.7 and 14.5 volts indicates a healthy charge and therefore a properly functioning regulator. There are procedures to test and adjust external voltage regulators, however, this technology is usually limited to classic cars.
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How about the voltage regulator? Shouldn’t be checked as well?
On most modern vehicles, the voltage regulator is internal to the alternator. Some manufacturers use the engine computer instead of a traditional voltage regulator to maintain proper alternator voltage. Typically an output between 13.7 and 14.5 volts indicates a healthy charge and therefore a properly functioning regulator. There are procedures to test and adjust external voltage regulators, however, this technology is usually limited to classic cars.