alternator wiring

I have a 1970 fj40 with F engine. After reading a number of alternator threads I have purchased a 1990 dodge Monaco alternator. Truck has basically no wiring, just the 4 wires to crank and run so no old wiring or reg to work around. What is the pinout on the 4 terminal plug?

I picked up the appropriate plug for my alternator from @Coolerman and have a yellow and black/yellow wire now. But, no idea what wires they connect to on the 74 harness. Diagram says W, WG, WB but no wires like that near PS fender. By the igniter I have a BY and a B wire. ?? By the charcoal...

Hey everyone, I'm new to the forum, the rules said I had to post an introduction, so here I am. Howdy. I've got a question pertaining to the alternator/regulator of an FJ40 I'm doing some electrical work on. This thing has had many owners and the wiring has been modified a bit by other...