@Chris, I have thought of that, but it’s clear there’s actually 3-4 problems since no one fuse amounted to enough drain. The previous owner intstalled: euro-light kit, new gauge cluster, radio/speaker/amp, remote entry system, and that’s just the stuff I know about.

Since I rarely drive that particular car, I didn’t install a kill switch because it’s easier to just disconnect the battery, I just forgot to last time, and by the time I got back to it the battery as flat. I didn’t expect it to drain in 3 days, I thought it had been taking a couple of weeks.

You haven’t hooked up a multimeter between the battery and rest of the electrical system and then popped the fuses out one by one to figure out where your problem is? That’d take something like 30 mins start to finish to localize the problem.

Or you didn’t think to install a kill switch on the battery to disconnect the battery when you’re going to let the car sit for a while.

And you call yourself a hacker.