96 850 GLT .45A Parasitic Draw??

[andyleonard]

Hi, We've been using a battery disconnect since we bought this car 3 years ago for my son, as in 3-4 days the battery will get too low to start the car. Driven everyday it's fine.
Today we went after the parasitic draw and are getting .45A..not milliamps... even with all the smaller red wires removed from the positive terminal. So whatever it is is feeding off the fat red wire that disappears under the engine.
Battery is good and at 12.8V. Charging is good.
Can anyone guess what's doing this? I *could* start tearing the car apart but ..is this common? Is it the diodes in the alt?
Big Thanks,

Andy