Namerow, Forgot to ask... Does this plug-n-play diagram agree with what you were intending to construct? Other than the early pigtails using a black wire between the main harness and the bulb prongs, does everything look right and make sense?

 

 

 

I had to check the color twice, and even clean the dirt off both to make sure I got it right.  According to my 1978 wiring diagram one set should have a RY wire, but both were the same, as I had posted.