I need help please. Anybody know of any threads here talking about 50's GM vacume wipers? 1956 Pontiac Chieftain, to be precise. I am working with a 1956 Pontiac Chieftain that has the vacume wiper setup on it. One nipple has a hose that is connected to the motor via hard line off the block to the hose, to the wiper. One of the nipples on it is without a hose and the wipers won't shut off unless the hoseless nipple is blocked off. Whats going on here? Anyone have some information for me? Any input is a plus for me. Thanks, Bruce