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Old 08-20-2007, 05:53 PM   #1
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I have just installed an AutoLite Pro Alternator and a new Optima Red-Top battery. At idle, with everything on (high beams, radio, a/c, rear window defroster, etc) the car has about 12.6-13 volts. During movement it typically has 13-14 volts. Is this good? Previous Alternator was allowing the car to drop to 11.9 without everything on even, so I'd only imagine this one is fine, I just need a professional second opinion.
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Old 08-20-2007, 07:21 PM   #2
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That falls within the general range of these alternators.... Generally once they have charged the battery and the car has warmed up.... 13.0-13.5 would be common, with points as low as 12.5 for very short amounts of time.. So yes it seems as the Alt you have is operating in the correct range

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Old 08-20-2007, 07:23 PM   #3
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Yay!! I feel better now...

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Old 08-21-2007, 09:28 AM   #4
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Another thing to consider is the reliability of your gauge. Read the gauge..and use a volt meter on the battery to look for any discrepancies.
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Old 08-21-2007, 04:13 PM   #5
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I'm using my Pioneer Radio'* voltage readout as a secondary to check the accuracy of the dash gauge, and they both agree with eachother
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