unhook the negative battery cable .. hook up a test lite between the cable end and the battery terminal .. the test lite should glow if you have a short somewhere or something still hot with juice ,, start unpluging fuses as you watch the test lite .. if it goes out with a specific fuse then that fuse most likely controls whatever is draining your battery .. if no fuses find the problem then go to unpluging any and all other plugs you can find .. one of the most difficult shorts for me to find one time was a defective door lite switch .. it stayed hot with the door shut or open but didn`t turn on the dome lite ...