[Yadmas]

Greetings,
65 Pontiac Bonneville 389/4
I have an extremely annoying issue where my windshield wipers (2 speed) wont go into park mode. When wipers are on, both speeds work fine. when i turn them off the go down... but they dont do the final move into park. Ive tried alot of stuff. Taken the whole thing apart and removed the old crappy grease and replaced it. I replaced the wiper motor relay. If I take it apart and connect alligator clips to the 3 different switches and my battery, I can get it to spin, and I can get it to go into park mode, its when i put it back together that it doesnt work. maybe its not grounding? but i dont see how. any thoughts on this? theres lots of posts on pontiac forums, but none of them quite match or they say stuff i dont understand.