 alternator dead ??? |
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| SirAndy |
  Jan 16 2006, 11:23 AM
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#1
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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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| dmenche914 |
Jan 16 2006, 11:38 AM
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#2
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Senior Member Group: Members Posts: 1,212 Joined: 27-February 03 From: California Member No.: 366 |
12.5 is a bit low for a battery. I'd first try charging the battery overnight, (disconected from car) and see if it gets up to about 13-14 volts if it still remains at 12.5 volts, then i would think the battery is on its way out.
I'd do this first, cause it is easy, just set it up over nights, and see what yu have in the morning. Strange that it dropped so much when you ran the car, does it drop even more when head lights are on? changes with higher rpm? A drying battery can pull down teh voltage, as one cell of the six may be shorted. This prevents full voltage in a charge . If battery is good, before chucking the alternator, make sure the connections including the ground strap is good. you could also swap a known good battery in today if you don't want to wait overnight for a charge, and see if situation is fixed with that. (I assume most 914'ers have spare cars for a spare battery source) Be sure to swap out teh battery, not just jumper it to the existing one, casue if teh existing one is shorting, it will also draw down teh voltage on the other battery. good luck |
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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 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 SLITS A charged battery will see 12.5 volts...if checked... Jan 16 2006, 01:04 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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