steering colum harness help

Go to MyMopar

66 Plymouth shop manual, and wiring diagrams:

http://www.mymopar.com/index.php?pid=31

http://www.mymopar.com/index.php?pid=109

Also, some free manuals here, some of them from MyMopar as well

http://www.forabodiesonly.com/mopar/showthread.php?p=1970088657

And diagrams from MyMopar

http://www.mymopar.com/downloads/1966/66BarracudaA.jpg

http://www.mymopar.com/downloads/1966/66BarracudaB.jpg

Using the above diagrams AS A STARTING POINT consult diagram "A" and find the "directional signal switch connector" about mid page. White from terminal 7 goes off to the right to page "B" where you'll see it goes to the stop light switch

http://www.forabodiesonly.com/mopar/showthread.php?p=1970088657