Hello,
You could have a draw on the battery. To check for draw you will need a test light. Then remove the positive battery terminal and connect the test light inbetween the cable end and the battery terminal. If the light comes on then you have a draw on the battery and that it why the battery dies over night.
To find circuit the draw is on you can start pulling fuses one by one and check the test light each time. When light goes out that is the circiut with the draw.
Check out link below for more info on How to test for an electrical draw....
https://www.2carpros.com/first_things/why_is_my_car_battery_dead_over_night.htm
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Thursday, May 21st, 2009 AT 7:25 PM