I left this van unused over winter (Southern hemisphere). I had some trouble starting it a month or so back, and it turned out to be a loose electrical connection to the fuel pump. After I left it for another week, I now get no response at all when I turn the key. No lights on the dash, no sounds, and definitely nothing from the motor.
I tried connecting the battery to a charger, but it shows that the battery is already full. (I'd bought a new one as part of troubleshooting the fuel pump issue, so I would've been very surprised if it was flat.)
I checked the fuses by the passenger's feet, under the hood above the battery and on the red cable connected to the positive terminal. All the ones I can access seem fine. I can't figure out how to get a look at the ones in black or pale green boxes that are screwed in.
Any ideas what else should I check?