Hopefully this will help with the wiring question. Both the Air-Flow and Recirculating types use a single switch to the left of the steering wheel as shown.
https://www.flickr.com/photos/advance-design_parts_co/31285149207/in/album-72157631872034068/
Factory switch, various years say Heat, Air, Def.
https://www.flickr.com/photos/advance-design_parts_co/15723396160/in/album-72157649468726416/