Wiper Motor have 3 sp switch with 2 pd motor

I bought a 3 speed wiper motor from I think rockauto.com. Look up a 1976 duster. There are 2 different ones. Get the cheaper one. All you need to do is splice the wires to the connector. The more expensive motor -I believe- is the same way. My motor was going out but I found out that it was my switch that was bad, It wasn't "parking" the wiper arms. The "park" brass connector on the back of the switch was broke off. Check yours. May be the same thing happening.