I cannot find anything that matches those wire colors exactly, the closest things I can find are the turn signal flasher and the emergency flasher. The emergency flasher shows a pink and black wire but the turn signal shows a black and brown wire. All that said, I am looking at a 70 Challenger diagram but it should be essentially the same.
Its process of elimination, if everything works you are good, if something doesn't you need to trace it out to find out why.
