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Re: voltage drop problem
12.3 to 12.6 is a standard resting voltage...14.1 to 14.3 is good voltage with the vehicle running. Newer batteries should rest about around 12.5 or higher.
Although a slight drop in voltage is normal during cranking, getting down below 10 volts is definately a problem and needs to be checked out.
Put a good trickle charge on that battery overnight to see if the battery can be resurrected. If not, go and get a new battery. I just got an Optima red top for $153 from Summit including shipping...Autozone, etc has good batteries for less than $100 bucks. Heck, I think Wal Mart does too!
Also, make sure you get something with 800 Cold Cranking amps...or more. Anything much higher than that is overkill...
Tom
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