I bought a 2 speed WW switch a couple of years ago at a swap meet thinking I would add it when a did the wiring harness. Well the truck is rewired and everything works BUT the switch. I look on the box and it says for 60 to 63 switches with washer pump. My original switch only has one wire as the truck did not have a washer fluid pump. It does now and is run by a button on the dash but the switch I bought has 3 wires and will not run other than the fast speed.
What can one do?

EB