 alternator dead ??? |
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| SirAndy |
  Jan 16 2006, 11:23 AM
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Resident German  Group: Admin Posts: 42,479 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California  |
my volt-meter dropped to ~10V while driving, dead battery i thought ...
i measured the battery with the car turned off, 12.5V on the terminals. i started the car, 11.5V on the terminals. checked at the alternator, 11.5V ... alternator dying ??? (IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif) Andy |
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| SLITS |
Jan 16 2006, 01:04 PM
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None  |
A charged battery will see 12.5 volts...if checked immediately after charging..maybe a 0.5 volt more.
With the car started, it will see less than 12.5 if the alt isn't working because the ignition and fuel circuit all take power. Any alternator system that is working will see about 14 volts at the bat terminals when the vehicle is running......unloaded. A VOM only tests for voltage...unless you have shunt (resistor coil) for placing a load on the battery/alternator and then it would have to have AMP capacity readout. |
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Posts in this topic
SirAndy alternator dead ??? Jan 16 2006, 11:23 AM
Joe Sharp Andy: Check voltage before the regulator, should b... Jan 16 2006, 11:30 AM SLITS Es ist tot meine Furher................... Jan 16 2006, 11:31 AM dmenche914 12.5 is a bit low for a battery. I'd first tr... Jan 16 2006, 11:38 AM lapuwali I disagree. 12.5v for a battery w/o the alternato... Jan 16 2006, 11:48 AM dmenche914 Per offical VW manual 1970-1978 for Bug Ghis, etc.... Jan 16 2006, 12:40 PM
r_towle Andy,
Go to Sears and have them put an AMP test on... Jan 16 2006, 01:13 PM |
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