3 speed variable wiper switch

The park switch is in the motor (on the gearbox) but the switch sends power to reverse direction on later model. Just totally different schematics.
Get this... My 67 waher resivoir is cracked and I dont really need a washer anyway so, I used a scotchlock connecter to join the washer pump lead to a park switch lead at the bulkhead connecter. I push the swich knob (like I want wash) briefly and get "one sweep" intermitent wipers. Neat huh ? Never figured out the same for the later model reversing motors.