1972 Duster 340 Car, Electrical problem

the brown wire on the bottom right on the relay goes to the nss the other pic is the pigtail that runs to the trans. this might give you a little better idea of what to look for.that pig tail plug is the only one with that shape, at least it is on my 72. hope this helps you a little bitIMG_20161010_103321909.jpg IMG_20161010_103645550.jpg