I have a quick question I have a a wiper motor with three terminals/ My switch I believe is a two postion switch even know each postion goes the same speed. Do I need a 4 terminal motor for this? Also right now even with the same speed on both position when it goes to park it goes all the way down then comes back up like 1-2 inches. Is this normal or do I have the wrong motor wired up? I only have a connector going to two of the prongs. The third has no wire. The harness coming out of the firewall has a blue, purple, white cord like, yellow, green, and white wire. The yellow and white are hooked to my wiper motor and the green is cut. I am assuming the purple goes over to the solenoid on the starter. Any info would be great thanks!