How do you check to see if alternator is bad

Asked by Wagoneer_2866 Feb 21, 2017 at 11:11 AM about the 2012 Honda Civic

Question type: Maintenance & Repair

2 Answers

2,105

Most major auto parts stores will check this for you for free. This will test your battery and alternator.

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157,445

With engine running, measure the voltage across the battery terminals. If it is 13.5 to 14.7 your alternator is charging. If voltage is substantially higher or lower have the alternator tested.

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