Deathtrap, My 74 Plymouth Scamp

So it's been a bit since I have worked on the car. I've been trying to figure out my wiper switch and I have no idea how it's supposed to be wired. I have a 3 speed wiper motor part number 3431905 and my switch part number is 3488764. Off my wiper motor I have a red wire, dk blue wire, dk green wire, and brown. These are hooked up accordingly to the switch and pink is my main power supply. When I hook it up to the switch I turn it on and it only has one speed then when I try to turn it off it just slowly rotates. I've tried following the wiring diagram I had which is for a 74 Dart and I can't figure it honestly. Any help would be appreciated

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