1fststang wrote:

.   I'm coming to the end of the install of the AWW harness in my 67 Fastback

So when I'm ready to put battery power to everything I guess i might be a little nervous.

Completely understandable. I was too.

1fststang wrote:

Was thinking maybe hook the battery up and add a fuse at a time and check that circuit to make sure it works before continuing to the next one.  This would identify if there was an issue circuit by circuit.

One circuit at a time, Absolutely. Use a small fuse, like 5 amp or less to power the circuit for testing. Install the correct size fuse once it passes the smoke test!!

On my harnesses I always ring it out with an ohm meter one ckt at a time before I apply any power.  Then I use a 12V dry cell lantern battery through a 1 - 5 amp fuse to bench-test it hot.  That way I can prove every circuit from the battery out including relays, switches, power distribution, etc.  If you limit current from the battery with a small fuse it's pretty hard to get into much trouble.

Probably a good idea … instead of doing an inadvertent “smoke test"!