Here is some info that I got off the net a while ago and have never verified, but it seems to make sense.
If your battery keeps going dead in a day or two, and you want to locate a drain, here's what you need to do:
Get a test light, and disconnect the negative battery cable. Hook the aligator clip from the test light to the negative battery cable end, and touch the test light probe tip to the negative battery post. If it lights up, you have a drain somewhere. If this is the case, you then need a helper to hold the test light probe to the negative battery post while you remove fuses from the fuse box, one at a time. When the light goes out, make a note of which fuse it was that you pulled out. That is the circuit with the drain. You can then check and see what accessories are hooked up to that circuit and start checking them out by disconnecting them, one at a time, just like you did for the fuse. The one that gets the light to go out is the problem child.
Like I said I have never had to use it, but it make sense. Good luck.
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