Random thought: Try disconnecting the B+ from the back of the alternator and see if it affects the draw. I've seen several Ford alternators die and cause a battery drain. The diode goes bad inside.

 

That's what I was getting at, but when I posted from my phone last night I couldn't see the schematics without having to click on each one (was being lazy, so I didn't) therefore, disregard my comment about the yellow wires. I now see the output leads are actually black/orange.

As mentioned, I would still disconnect ALL the wires from the alt and see if the draw goes away.

 

I will disconnect the alternator and give it a try.

 

I had a nasty short on my 89 f250, and it got to where I fitted a battery switch. Ultimately, I traced it to the rear drivers side of the frame where the taillight wiring passes thru a raw steel opening in the frame, forward of the bumper on the far left (from rear). You would be looking for one or more razor nicks in the wire. That's all it takes. Just tape them up, and wrap the bundle if those nicks (or worse) are present.

 

Pulled the alternator this afternoon. Short gone. Get a new one tomorrow. Hope that does the trick.

 

Is it the regulator or the alternator? How do I tell?

 

I would like to thank you all for the help you gave me. The problem was the alternator. Had a short inside it somewhere. While I have had them go bad before, I have never had one with a short that drained the battery. I did however gain some knowledge with how this truck is wired. Next thing is to replace the brake lines on this puppy and put it on the road. Just ordered new preformed lines and will get them by the end of the week. This is a great forum and I am glad I found you guys.
Nick