I have a 65 Impala that I inherited. The connectors from the wiper dash switch and the motor are both missing. How do I tell if the replacement switch I need is for a single or dual speed wipers? Wires from the wiper motor are 2 blue/black and one black.
Take a picture of the wires and the motor. Is there another pink wire also on the 3 point connector? It sounds like you have a 2 speed, however I would like more info.