Hello all,
It’s been a long time since I have posted anything, I can’t remember if I still had my k5 blazer, or my c10. Unfortunately I no longer have the blazer and the c10 was involved in an accident. I ended up buying my father’s suburban from him, and now I am tidying up some of the wiring. He’s bought some powered accessories from a three letter company who I shall not name and there is a bit of wiring mess in the cabin. While attempting to get the radio pulled out, one of those retrofit modern radios, something happened where the fuse block no longer has 12 volts at the bat terminals of the fuse box. The truck still runs, but I would really like to get this addressed so I can run the radio 12 volt constant from the fuse box rather than running a new wire into the truck for a temporary solution, because I have found there is nothing more permanent than a temporary solution. 
Sorry, I know you have wiring diagrams posted, but I only have my phone currently than that’s a mess to try and track on it.
Thank You for your time.