2 speed wiper motor with universal switch question?

i thought about trying to put in a momentary switch that sent power back to the..."normal ground" but then the other switch would have to be in the off position, and you'd have to have a way to ground the otherwise 12V wire...or there may have been a different wire altogether that the ground circuit would have to run to, cant remember now. I guess at that point i didn't see any point in "bumping" it backwards having any benefit vs bumping it forward. in a factory setup the auto off would be nice. I drove an 86 K10 pickup to HS and college that didn't even have a park feature, or if it did, it never worked....so just bumped them around until at the low spot lol. First world problems :p
Well there ya go. Sounds like you have done the homework. Thanks for sharing that. Looks like there's a good reason the switches are expensive. Like you and Del said there's a few things going on there to park the wipers. So a new switch it is!