My 01 S80 is killing the battery every day. I have a 4.3 amp draw and it seems to trip a ton of relays every time i check. It seems to also try to lock the doors every time i hook up the amp meter..

WHat the hell is going on? Also where can i get diagrams for what the fuses are?
There fuse boxes everywhere on this car.

 

Ok I figured it out... The car will draw about 4.5 amps for 2 minutes or so then it will trickle down. I had .6 amp draw from the blinker switch. After I removed it I get .08 amp draw.

 

There is still something else drawing. The min should be about .025 amps.
But it will take atleast 2 minutes for the computers to go to sleep.
Also make sure the car is locked and alarm is set. Easiest way to do it is once the car is locked and alarm is set stick one probe of the meter on the stud. Then the other in the center of the battery post and slide the terminal up and rest it on the other probe that is on the post. That will not interupt the connection to the car at all. And the alarm will still stay active.

 

there is a board for the anti theft system that controls the audible horn. it was moisture damaged and would sporadically drain the battery on my former '00 s80. I had it disconnected (replacement was over $400) and the problem went away.

Hope it helps.