Hey sunbelt, welcome. Not sure about your electrical issue (yet) but posting pics either takes an independent hosting site like SuperMotors or one of many others that you post up pics to, then link them in your classicbroncos thread.
The other, easier way (but harder to justify perhaps, after only just joining) is to become a contributor by paying your 13 bucks I think it is(?) and then you can post away to your heart's content right in the body of your message.
It's very convenient that way.
Regarding your issue, I've always hated the '72-only wiring diagrams. Just plain weird I always thought. But haven't really spent much time with them either, so maybe I'm just not giving them a fighting chance.
Let me go look at mine and see what I can come up with.
Viperwolf1 may chime in soon though, and is a wealth of detailed wiring knowledge. When you come across them, keep a link handy to Steve83's home-brewed wiring diagrams. Good detail and lots of updates to make them even more accurate (based on the real-world) than the original ones you find in Hayne's and Chilton's.
Hang in there. You'll get it licked in short order.
Oh, and include some details in the setup pages of your User CP (control panel) so we know approximately where you are and what Bronco you're working on. I know you said it's a '72 (obviously), but knowing where you are can actually net you some local help sometime if you ever need it. The folks here are pretty darn helpful.
And fun too, as they usually bring stuff to eat, drink and compare Broncos too, when they invade your space on work-day!
Paul