AC Heater Switch help needed with swap
You can download a later service manual which diagrams the newer switch
The problem is, that I don't have access to wiring docs for a '65 switch, and don't know if '66 is the same or not
http://www.forabodiesonly.com/mopar/showthread.php?p=1970088617
Chapter 24 in the 69 manual has a lot of info on control positions and what does whom to them and when
The diagram for 65 may or may not be accurate, I could not see that they specified what models this applies to. The 65 manual is page 24-6
The 66 Dart/ Cornet manual is page 705. That one is consecutively numbered
None of this is specific to 'Cuda which may or may not be different
The diagrams are top to bottom 65, next three is 66, and bottom is 69