Brake lights stay on, off when pedal pushed.

A correction may be in order from me. I just took a look at my '74 wiring diagram and see that the stoplight switch, in fact, appears to have two wires - one pink and one white.

Make sure your switch is adjusted so that it is fully depressed when the brake pedal is relaxed and in the up position. Then make sure the switch's plunger extends when the pedal is pushed down.