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You either have some device that is staying on, (dome, glove box, hood, trunk light) or your alternator is not working properly. Also you may have corroded battery connections. Have your charging system checked at most auto parts stores. You can also check the voltage at the battery while the engine is running. Should be 13.5-14.5 volts. Try this: There is a 12 volt power(usually red) lead on the back of your alternator.Carefully remove it when you park your car. Alternators generally have 12 volts direct to them so if a diode/rectifier is bad it will act as a dead short and kill and battery in no time.If this solves the problem replace your alternator..1930fcoupe

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18y ago
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Q: What would cause the battery in a 1991 Toyota Camry V6 to drain twice in less than two weeks?
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