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One way to track down a draw...
One method of helping track down a draw that is draining your battery:
Disconnect the negative battery cable. Hook one end of a test light to the negative terminal of the battery and the other end of the test light to the negative battery cable. Make sure everything is turned off and the doors are closed so that there should be nothing that is on. (If there is an underhood light that comes on automatically when the hood is open, remove the bulb or unplug it.) If the test light lights up when connected between the battery and the negative cable, there is something drawing energy from the battery. Now, pull fuses one at a time until the light goes out, putting them back as you go, of course. When you pull a fuse and the light goes out, you know that the draw is somewhere in that circuit. That may help narrow down your search quite a bit.
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