Join Date: Jun 2011
Location: Colorado Springs
FYI, getting 12 volts from car battery using a volt meter means absolutely nothing. A car battery must put out AMPS, and a lot of them, to turn over an engine. A battery can be almost completely fried with only one working cell, and it will still put out 12 volts.
As I always say, if there's any question about a battery, take it to Auto Zone. They'll charge it overnight and put it on a Bear battery tester. That's a very good tester and it will immediately reveal any issues.
Unfortunately, you're not going to be able to diagnose dead cells, or any other issues, at home. And the first step when diagnosing a starting system is to verify the battery is good.