Hvacdude,

Yeah, that's the path I'm on. I've pretty much ruled out the prime suspects, so I guess it's time to start pulling fuses one by one. I've already pulled each of the ones in the cargo area because they're a lot easier to get to, but no luck - still getting over 4 amps.

I have a question about this whole sleep mode thing. I disconnected the negative cable this past Sunday and fully charged the battery, and have kept the cable disconnected ever since. I assume this is plenty of time for the car to have gone deep into sleep mode. So when I reconnect the cable to the negative battery terminal (with a 1 ohm resistor between the terminal and the cable, across which I'm measuring the voltage drop), am I "waking the car up" and creating an unintended but normal drain? I've assumed that since my drain is so massive, the difference between the current draw in sleep mode, and that when the system is "woken up" is in the noise, but am I making a mistake with this assumption? Thanks.

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2003 X5 4.4i
1992 Porsche 968
2007 328i
2014 Subaru Forester XT