I have found quite a few wiring diagrams for the early Fords, but all are lacking details on things like the heater, radio, wipers, horn, wipers, etc.

Were these all dealer installed and maybe that's why? Or is there one out there that I just haven't found yet?

I found one for a 1957 that seems pretty complete that I can use if nothing is available.

Thanks,
Ernie

 

I bought one for my 55 from here. It's pretty handy.
Ford Truck - ClassicCarWiring
It didn't have turn signal wiring, so the one for the 56 is probably lacking the things you are needing as well.
I ended up building my own diagrams for specific sections. You can do quite a bit with Visio. Since I added a fuse panel and a headlight relay. I kind of had to do a lot myself. I looked through a lot of different diagrams and things like instructions on installing a headlight relay and combined it all into one.

 

They're also some of the simplest things to wire in....

 

Heater, wipers, radio to ACC
Horn Battery Power always on
All are wired through the ignition switch I believe.