my horn, hazards, reverse lights, and those turn signal thingys on the fenders dont work. I started working on it last November and the horn and fender things worked. what could have caused this?
People here are willing to help, but you have to be willing to put in the effort to learn.
And don't BS yourself or us. It doesn't make solving the issues any easier.
Did you get a multi meter?
Did you track down any of the non-functioning circuits the way Harrison suggested?
Do you have the '73 service manuals downloaded?
Did you resolve the fusebox getting hot? If not, then that's the one we should start with.
And yes those questions are real. I want to know what the situation is before making suggestions.