THIS they are free and you don't have to jump through hoops. Not only that but that manual, and a few others, GOT over there because a few of the guys right here.
I don't remember for certain, but there might be also some info about the heater AC wiring in the body manual
Certainly read through the AC/ heat chapter of the chassis manual in addition to the electrical / wiring section of the manual
ALSO WHILE YOU are at MyMopar, go to the wiring section, and download the aftermarket wiring diagrams. These are NOT as detailed, and leave out some options, but they can be much easier to follow. I often use them in addition to the factory manuals.