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I had the same problem on my denaly it is a module in the dash for the heather. even if you turn the key off it is still on

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โˆ™ 2008-06-12 18:24:08
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Q: How do you find out why the bAttery keeps draining?
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Your alternator is shot.

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Then either something is on draining the battery or the battery has a dead cell draining all the rest and must be replaced.

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There is an easy way to find out what is draining the battery on your car. Disconnect the positive or negative battery terminal. Not both. Connect a test light between the post of the battery to the cable end of the battery. If your car is draining the batt ery the light will show it. To find out where the drain is coming from just pull fuses until the light goes out. Then you will know what is draining the battery by the function of the fuse you just pulled. For example, if you pulled the fuse for "radio" and the light went out you would know the radio is drawing the current off your battery.

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Battery KEEPS draining?

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It may be that the battery has a dead cell, so you should fully charge the battery and have it tested at any auto parts store. If the battery is good then Start by checking all the accessory lights. Trunk, under hood, glove box, curtorsey, dome, all lights. If none of them are on then suspect a stuck relay. Power windows, seat, locks, etc.

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