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Battery died

(1990 Chevrolet Lumina)
in New York, NY on April 27, 2010
battery died when car is off something is draining the battery
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Popular Answer
on December 19, 2010
do you have a tereo or amp that is not being turned off when the key goes off
you could also have a bad voltage regulator charging the battery when running but running the bat voltage backwards thru the diodes in the alt regulator to ground
check after the car is cold and see if the alt is still warm,indicating a shorted voltage regulator/alternator
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