[Michael C Henry]

On mine it has seperate brake and turn lamps on the rear. The brake signal doesn't come to the turn signal switch.Four way switch is a special switch dash mounted. Power comes through the flasher to the turn signal switch.and is split left and right.The four way ties the two sides together when actuated. I'musing the two wire flasher.
The americam manufactured cars had a single bulb for turn and brake lites.The brake signal goes thru the turn signal.seperate wires for LF,LR ,RF,RR. and a brake lite canseler is incorperated in the turn signal switch. That would be six wires if not eight wires for indicaters.