I have a 1973 caddy hearse that has a problem with the wipers. The only time they work, is when the washer pump is activated. The wiper/washer switch is mounted on the drivers door. Is this a factory switch/switch location? When I ordered a new wiper motor, they asked if mine was a phase 1 or 2? Does anybody know off hand which of the three terminals on the wiper motor does what: power, high, and low, or is one a ground?