Whilst working on the ACAD for the wiring I finally think I know something.
Being your basic gearhead +12v on the battery is hot, -12v is ground. So when I see -12v, GND, and SHEILD, it all means connect to da frame.
Now I am beginning to see that's WRONG.
Back to the spagetti bowl
Someone hurry and tell me if I'm still fecked up, before I get this all rewired.
Ashby