Ginny's car is a classic 1994 Lexus LS-400. We hardly ever drive it. Maybe 500 miles or so per year. That means it spends a lot of time just sitting there. That doesn't sound so bad except that the battery gets drained. This happened a couple weeks ago. After charging the battery and checking the alternator, it was ready to go. I went out and got a battery charge maintainer gadget which we now keep attached.

So I decided to start figuring out what is draining the battery. First thing was to check the current which turned out to be a whopping 400 milliamps. You can do the math and see that it doesn't take too long to drain a battery. I pulled the fuse for the lighting system and found there was about 200 milliamps through that circuit. There were no lights on inside the car, but I wondered about the trunk light. Try as I might I couldn't close it far enough and still see if the light goes out.

The the light came on in the attic. I set the timer on my iPhone, put it in the trunk and closed the lid. Sure enough, the trunk light goes off when closed. The wonders of modern technology will never cease.