Re: exhaust manifold line to the fuel pump?

Posted by HH56 On 2016/1/26 20:45:45

Assuming it is a factory supplied or installed or at least a correct type washer for the year then there could be two ways to operate it. It depends on where the vacuum source is connected and the type of washer.

One system has the vacuum source independent and connected somewhere in the tube between the fuel pump vacuum section and the wiper motor. Most likely with a tee in the short section of hose right before the motor. That tube will go to a pushbutton under the dash edge and then another tube goes from the button to the washer top. On that type you hold the button until the water is pulled into the pump section. Releasing the button lets a spring push a diaphragm down and expel the water. Once the water starts squirting you turn on the wipers.

On the second type, the vacuum tube going to top of washer connects to a port on the drivers side of the windshield wiper motor. There is only one vacuum tube and no pushbutton. On that type the wiper on/off knob on the side of steering column rotates both ways. Rotating toward the dash operates the wiper. Rotating backwards toward the driver and holding it there opens a valve on the wiper motor and lets vacuum pass from the vacuum port to the washer. You hold the knob for a few seconds then rotate it forward. Once the knob starts moving forward water will start to squirt and you keep rotating forward to turn the wipers on.

If both types have been dry and unused for 50 years there is a good chance the rubber has all deteriorated and nozzles clogged.