Chris,
I think the explanation of wire function is wrong on the 6066 site. Wire #1 energizes to give the field an initial charge, then becomes "charged" itself. This is the function that makes the idiot light turn on and off! Wire #2 allows the regulator to keep tabs on the alternator output and regulate it accordingly.
It's possible to have a alternator with a regulator in it that allows single wire operation, so not all is revealed just by looking at it.
The last photo you linked of the previous owners setup would be proper if the wire going to the BATT lug came from terminal #2....it looks like it comes from #1, which isn't correct.
If that wire were moved to #2, and a wire were attached to #1 that was energized when your truck was running (key switched), you would be in business. Any charge light would be hooked in series with that wire to #1.
I'm pretty sure this is how it works. I reference that 6066 site a lot, and he has tons of great info and a great site...I didn't want to come across as "dissing" him as he might have overlooked this item, or I'm all wet.
Stuart
