I stand corrected. My 1965 Dart manual shows the same, as does my 1965 Chrysler manual. I know the Chrysler plastic turn signal cam is just plastic (PN SM3?, recall similar to my A's), whereas in my 1969 Dart it had two wires to solder (PN SM9?). Anyway, since they do route the wires thru the turn signal, the filament(s) used for the stop lamp must serve dual-purpose for turn signal flashing too, or at least they disable constant stop lamp while the turn signal is flashing. My Chrysler has ~3 bulbs on each side in the rear so it isn't like they ran out of bulbs to use.
