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It’s accurate. The battery is there to start the car, and to act as a filter for the electricity coming out of the alternator, by absorbing voltage spikes. However, the way I’d test an alternator is to start the car and put the leads from a multimeter on the battery terminals. 13.8v to 14.2v is generally considered normal. I consider the alternator OK all the way up to 15v, so if it’s reading a little more than 14.2, don’t worry about it too much. Anything less than 13.8v at idle with no loads on is a sign of an alternator that’s barely working/not working at all, and it should be replaced.
Taking the battery out of the car to prove the alternator is bad is false. a alternator is not meant to run the car alone.
Doing so will over work the alternator and destroy it. The battery and alternator work in conjunction with one and other.C8-)http://www.youtube.com/watch?v=FTGz0PKI … plpp_video alternator
Quoted From college man:
Taking the battery out of the car to prove the alternator is bad is false. a alternator is not meant to run the car alone.
Doing so will over work the alternator and destroy it. The battery and alternator work in conjunction with one and other.C8-)http://www.youtube.com/watch?v=FTGz0PKI … plpp_video alternator
Yep. This is how you check an alternator.
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