Have not yet really gotten into the wiper system. But, seems to me that the switch has power coming into the B pin, with one W pin maybe for the washer motor. And there are four switch wires to the motor. The diagram says all four just hit the motor. I want to test my motor. Anybody have experience with how to power up the motor.....four wires, grn, lt grn, brn and red. Not sure if 2 or 3 speed, but also was thinking this was already grounded, and power would simply be for several speeds. And, parking is sometimes just shut down power and it will continue to the park position....but, have no idea. Any help on testing appreciated. Have not tried to test my switch yet, as I am not sure what I should be seeing out of the four wires to the motor. Thanks