Intermittent power or short to certain accessories

The hazard and radio get their power from the tail lamp relay so the prongs may be corroded or poor connection. Yu can try bending it a tad and use dielectric greas on prongs for better connection. Tailamp relay also sends power to ignition relay and accessory relay. Because it shorts on you I don't want to say it's that particular relay but it powers a few of the things you have wrong. However it could be a bad ignition switch as well. Check to see if anything has been added under the dash and any wires hanging or bare as they may short out at certain times hitting metal under there. Other than actually look at this it may be easier to start with the tail lamp relay by bending prongs a bit. It may also be a bad fuse panel. We don't have any diagram of the relay where it's located other than it says fuse junction panel but all I see are fuses and not relays.

I would kind of think so stuff like what you have is usually found by mistake. I'd try that as it has to be the switch or the other relay I talked about.