I have a 66 Chev with a 2-spd wiper motor/ washer combo. In the shop manual, there's a drawing, but no listing of what terminal is for what!

There are two on the pump and 4 on the motor.... help! I don't have the whole old harness and I have an aftermarket switch. I will probably wire the washer to a separate switch, but need help on the wiper switch.

John Bayer