[Duffinatur]

Thanks, I ended up re-connecting everything one wire at a time to see if I could find a short. Everything behind the dash has male/female terminal connections so I could remove it easily without crimping or soldering. It turned out to be a bad headlight switch. I'm not EXACtly sure why the switch went bad but a new one fixed the problem. (and I'm more comfortable double checking the wiring to boot) Shell Valley supplies a common GM headlight switch that you can get anywhere, but this is the second one I've had go bad, so I bought a spare and threw it in the glove box until I can test if I have a surge or something else.

Thanks for the tips folks.

See you in London.