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why is my car battery going dead overnight


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how old is your battery? what kind of battery? Its posible you have a dead cell and its time has come.

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Do all 3, you don't necessarily need a fuse for the alt, just make sure you tie it up well and you can always go back and add a fuse later. How long have you had the car? And what kind of car is it? Is there anything at all staying on after you shut the car off that could be leaching power during the night?

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Sounds like one of two things. You have a bad battery that wont hold a charge. Or you have a draw on the electrical system that is causing it go dead over night. My best bet is that its just the battery.

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I'm far from loud and my roof/headliner flaps around like Adam's ass on a windy day. I think it depends more on the structure of the vehicle.

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Sounds like one of two things. You have a bad battery that wont hold a charge. Or you have a draw on the electrical system that is causing it go dead over night. My best bet is that its just the battery.

^ this.

1.) Go to the auto-parts store and have them load test the battery.

2.) If the battery passes, have them (or you) check the current draw of the car on the battery with the key off. You may have a parasitic item in your car that's slowly draining charge from the battery.

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Sounds like one of two things. You have a bad battery that wont hold a charge. Or you have a draw on the electrical system that is causing it go dead over night. My best bet is that its just the battery.

^ this.

1.) Go to the auto-parts store and have them load test the battery.

2.) If the battery passes, have them (or you) check the current draw of the car on the battery with the key off. You may have a parasitic item in your car that's slowly draining charge from the battery.

:good:

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