Wiper Motor Wires
Here's a first go at a schematic for the '67 Abody wipers. Its obviously incomplete. We might end up with several versions. Who knows. I used the Barracuda wiring diagram as the base but it seems the same as Valiant & Dart. Feel free to copy/modify.
Power comes from the ignition switch via a welded junction in the accessory circuit. That makes sense since wipers only work when the key is in Run or Accessory. I think there is a circuit breaker in the switch or the motor - its mentioned in the shop manual.
As far as manual transmission reverse lights go, according to the diagram there should be a white wire from the second B terminal to the bulkhead. So they only work when the key is on. That makes sense, otherwise the battery would get drained when parked with the transmission in reverse.