Me and a guy have been at this for weeks. 1980 Pontiac. There is a two wire connector that clips onto the washer part of the wiper motor assembly. One wire is white and is ignition switched hot. The other is pink and is a ground for the "WASH" button on the dash/column. He says it MUST be connected properly or it will burn up. I say it is a simple solenoid and it doesn't matter which wire goes to which terminal. Neither of us wants to risk burning up an expensive assembly just to prove a point.