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Bad Alternator or Regulator?

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Old 02-09-2015, 07:04 PM
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Default Bad Alternator or Regulator?
2010 A4 2.0L T. 12.98VDC measured with car turned off, 11.60VDC while running. Should the alternator not be generating 13.5 -13.8 VDC while the engine is running?
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Old 02-10-2015, 07:15 AM
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Default Re: Bad Alternator or Regulator?
Yes, it appears your alternator is not producing proper output. Could be it has worn out brushes or a bad voltage regulator.
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