Wiper Switch Wiring

Ok. I bought a 2 speed wiper switch with washer button from dart64gt (thanks a million), but when the original quit working a single speed was installed in its place since thats all they had. my issue now is that I'm unsure which pigtails are which. i would rather not experiment and take the chance of frying a good switch if I can avoid it. So, do any of you know where i can find a wiring diagram that tell which are low and high and where they plug in on the switch?