1988 Ford thunderbird Battery drain


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If your alternator is bad, your car will actually go dead while you are driving it. They can test your alternator at most auto stores like Auto Zone for free. If your car is running and the next day won't start could be a bad battering or other issue draining the battery they can teat it as well.
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Is it draining the new battery also? Sometimes when an alternator or starter starts going bad it will start shorting out inside one or the other. Take it to advance auto or auto zone and they can check out the charging system for free.