Afternoon Folks, Been having battery issues for awhile and I just got in from conducting a parasitic drain test. Since I put an aftermarket radio in, I decided to start there. I pulled the radio fuse and my draw went from 0.22 amps down to .03. Perfect! However, in pulling the radio fuse, I also lost my blower motor, dash clock, and bed light. I would have assumed that the blower motor would have been on its own fuse. Something to keep an eye out for. I'm going to take the dash apart on a warmer day and see if anything else looks amiss. Until then, I better bundle up!
You could try just unplugging the radio itself and seeing what you get, this assumes you used a connector of course. On the stock radio connector for the trucks that have it, there's both a switched 12V and an always alive 12V, so I would double check you haven't wired everything to the always live one. Good luck!