Why does almost every fuse stay hot with the switch off?

What is your question?

I have 2 of these. Both are converted to box trucks and both of them have massive battery drain with the switch off. Cutting the switch off will stop the engine and turn off the radio but everything else keeps going and almost all of the fuses stay hot. I've pulled out the few relays and they have no effect. Botj trucks will run a fully charged battery down in a matter of minutes. Could there be another fusr box beside the one on the side of the seat and the one under the dash that has all the relays. It seems kinda weird that it only has 3 relays for everything.