Help with brake lights and wipers '72 Duster

Peter Bates said

The brake switch should and will be there somewhere. It attached to the frame inside not the brake pedal. See pic of mine. Yes mine a 73 Cuda but I think the scheme was the same for all. Find a elec manual on:
Mopar Wiring Diagrams - MyMopar.com - Dodge Plymouth Wiring Diagrams

For your wiper it sounds like a ground issue. Run a wire from the back of the housing the switch connects on to the frame somewhere. You can also check your wires plugging into the fire wall in the engine compartment. Maybe they are tired.

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Thank you.............I took a second look today and still dont see a switch. Its evident that someone- not the factory- put a small steel plate on that frame to stop the pedal- but there are no holes really close to where I would mount a bracket and switch to be in line with the manual brake pedal. You show red/white wires, I'll look at the link you sent- and yes, I have suspected a ground issue on the wiper motor, but I have not looked at it closely yet.