Here we go again - Battery Drain - All Fuses Removed
 

Guys, my 04 3.0i has recently acquired a battery drain that can discharge the battery over night. I previously had a similar issue (over a yr ago) and traced it down to a dodgy aftermarket Bluetooth install, which I ripped out & the car has been fine for 1yr+. Anyway, nothing has changed on the car, but since about 1wk ago, the battery is being drained. As an expert (see above), I got a multimeter and the car was pulling about 10.0milliamps (I think that's what it is), where as normally it would be something like 0.04. Anyway, I started to remove fuses, but still the power was being pulled, so I removed all the fuses & relays in the front and the back and still getting the drain? What could be doing this? what would still be able to suck power despite all fused removed?

Battery could be useless

You have a bunch of high-current fusible links on the trunk floor, near the battery. And some more in the front in the fuse box. Not every circuit is on an ATO-style fuse.

FYI...10mA draw isn't much and should NOT drain your battery overnight. Even a 100mA draw should NOT drain it overnight. 10A drain, on the other hand is a different story.

hi could be the 2nd stage resistor for the aux fan

No sense in chasing 10 mA, because even if you find it, that is not the problem.

If your battery has a capacity of 50 Amp-hours, then the 10 mA would drain it in 5,000 hours, or 208 days (if things stayed linear, which they would not).