Voltage questions
08-20-2007, 04:53 PM
#1
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Voltage questions
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.
08-20-2007, 06:21 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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08-21-2007, 08:28 AM
#4
DINOSAURUS BOOSTUS
Expert Gearhead
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.
08-21-2007, 03:13 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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