What short in steering column would cause horn to honk randomly

Hello, wow, lots of information there. Simply addressing your question: your steering wheel has a sliding contact called a "clock spring" that provides power to the horn switch. It is possible you have a wiring concern there, an issue with the clock spring, or a horn switch concern. Only hands on testing will be able to help. On the other hand, it sounds like you have some other issues that could use some hands on testing too! Good luck.