Engine fired up first time...but electrical help needed

Thx for taking the time to provide such a comprehensive run down,

I am using the later external reg.

Believe it or not, that diagram is how I "thought" I had it wired....but I may have run the wire to the 12V switched incorrectly.

I wont have access to the car till Monday...but I intend on re-checking everything including the wiring to the fuse box and ammeter - then Ill check how Ive run the two field wires......and the reg earth.