Car starts on and off - New Battery on 1997 Ford Taurus

My 1997 Ford taurus Wagon has run perfectly until 10 days ago. It didn't start, I got a jumped it worked for 5 days. It wouldn't start for the past 3 days until yesterday I tried it started. Drove it to an Auto Zone and they did the diagnostics. Low Battery life, new Battery. Parked the car for the night, drove it to work this morning and now it won't start again!!!! Please help.

by in Little Rock, AR on December 27, 2010
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1 answer 3 comments
ANSWER by , December 27, 2010
Start with doing a charging system diag, make sure the alternator is putting out enough to charge the battery, if that checks out, then it's time to start looking for a current draw with key off. i assume when you say it won't start, then engine won't crank over ?
COMMENT by , December 27, 2010
Hey Thanks! Yes, the engine won't start over. The lights come on on the dashboard but the engine won't turn. Also notice the check engine light on.
COMMENT by , December 27, 2010
check engine light on when engine isn't running is normal, you could be dealing with a weak starter, but i would check charging system first, that's probly your culprit.
COMMENT by , February 02, 2011
Be sure and get a good diagnostics on the charging system as the computor conttals the regulator on that model Also worn out brushes will cause you to have a bugger in and vehicle Meaning they will make contact and charge a battery and then quit at any time a bad diode will kill a battery over knight and cause the alternater not to charge enough to charge the battery with normal load as to lights and AC being on. jlelandthomas