70 B-body 3 speed wiper conversion,

had a 2 speed wiper motor factory,
now I need the 3 speed model for air cleaner clearance,

I have a correct, 1970 B-body 3 speed motor installed, as well as a 3 speed switch, but the switch seems to work in reverse!
when the switch is pushed all the way up
(should be highest speed position) the wiper is off,
switch all the way down, wipers run extremely fast.
also, they do not "park" themselves, you have to work the switch a little at a time to get them down to the bottom of the windshield. The 3 speed switch I installed acts like it may be upside down, but it went in the same direction as the 2 speed switch it replaced.

Is this 3 speed switch just messed up?
Is the wiring differnt, 2 to 3 speed motors?
Is the linkage diffrent, 2 to 3 speed motors?

thanks for any response,
KB

kb6996@juno.com