Load testing battery - Taurus Car Club of America : Ford Taurus Forum
 
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post #1 of 4 (permalink) Old 03-03-2012, 01:55 PM Thread Starter
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Load testing battery

Looks like I'm in need of a new battery(as well as a bunch of other things, on top of what I have replaced already in this car it's REALLY wearing on my nerves)..............


http://www.youtube.com/embed/cRi_akjW6XQ





This is the 2nd time it's died on me in my driveway. I know the battery was getting weak but I didnt think it was THAT bad......

John
2007 Pontiac Torrent, 2013 Hyundai Sonata GLS

Last edited by sousa632; 03-03-2012 at 01:58 PM.
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post #2 of 4 (permalink) Old 03-03-2012, 06:56 PM
Ben
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what are you planning on replacing it with?
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post #3 of 4 (permalink) Old 03-03-2012, 07:02 PM
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At 11.9 volts, that battery was already pretty much dead before you started. Have you tried charging it fully?

If the battery keeps dying, you need to do a parasitic draw test. Take a battery cable off and put your meter in series to measure 10A current (move the red test lead to the other port). You want less than 0.050 amps or 50 mA. Start pulling fuses until it goes away.
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post #4 of 4 (permalink) Old 03-03-2012, 07:15 PM
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Quote:
Originally Posted by behlinla View Post
At 11.9 volts, that battery was already pretty much dead before you started. Have you tried charging it fully?

If the battery keeps dying, you need to do a parasitic draw test. Take a battery cable off and put your meter in series to measure 10A current (move the red test lead to the other port). You want less than 0.050 amps or 50 mA. Start pulling fuses until it goes away.
Agree.

Short battery life is due to over charge, under charge, or parasitic drain.

Over/under charging is easy to read with a volt meter.

Parasitic drain just pulls the bat down, charge up, pull it down repeat. Does not make for a happy bat. Over charging is not common but does happen. Under charging will overwork the bat.

-chart-
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