Get one of those lights that tells you there is a current, they look like a screwdriver with a short wire and an alligator clip. Disconnect the positive battery connection and put the light between the battery and the cable. If there is a draw, the light will come on. Now, go to the fuse box and take out the fuses, one at a time, until the light goes off. There will always be a current for the radio and the clock, but you will notice the brightness of the light change with that small of a current draw.
Once you discover the problem, you can act accordingly. My bet is the small switch on the door that turns on the overhead lights is bad.
Tuesday, January 10th, 2006 AT 1:08 PM