My S80 battery is very easy to run down. The battery tests good as does the alternator, leaving me to assume some sort of battery drain when the car is parked. I mechanic friend loaned me a tester that that you pull a fuse and plug it in its place. It reads the amperage draw on that circuit. I am working in the fuse panel on the side of the dash with everything shut down on the car. So far I have 5 fuses that test .5A, including the low beam headlights and audio.

My questions are: How many fuses should have a draw at rest and which ones are they? Is there a single module in common that could be doing this?