My advice is get into the AC service section of the shop manual. There are simplified diagrams and a little bit of writeup in there Section 24? I forget. The heating / AC section
I have the shop manual, and yes section 24 is AC/Heat, I think I found it at 24-96. let me review that section, thanks! I was looking up wiring diagrams and not even looking in AC, since this is a NON-AC car. ;)