How to get flap up on wipers ???

[rocky yo]

Regarding my 1971 vette. Ok, so the car is at the body shop, almost done but the vacuum system does not work. The body guy can't seem to get the hide away wiper cover open to get to that area of the vehicle. Does anyone know how to get that compartment open ? How do you hook up an external vacuum to get the thing open ? Thanks for any help ?

 

[Case75]

Did you try pulling down on the override switch under the steering column? Do the headlights open OK? Is the check valve functioning on the intake manifold? Is the vacuum filter pugged on the intake manifold? Is the engine in the car?

 

[rocky yo]

To answer your questions Case. No, No, I don't know, I don't know, yes ! Does that help ?

 

[buckhorn76]

wiper door operates from the same vacuum source as the headlight doors. the engine IS running, right ?

 

[rocky yo]

The engine runs but the lights and wiper door do not work. I have not had the system fixed yet but I was wondering how to open them with an external vacuum hooked up. Just to test the system for the time being.

 

[rocky yo]

Just as an side, does anyone have this system disconnected in favour of electric system.

 

[buckhorn76]

try unplugging the vacuum line from the intake and apply vacuum to the line.

 

[Case75]

Google the schematic and you will get lots of results. It's a very simple system in theory but there are vacuum relays and acctuators, lots of rubber hoses, a vacuum tank behind the front bumper and numerous switches (more like valves) to make it all work. The heater controls also use vacuum to operate. A good vacuum pump is a good thing to have to help diagnose where a leak is. The good thing is a lpt of the parts are available. And to answer your question; no, I have not converted to electric as everything is working fine.

 

[buckhorn76]

Dr. Rebuild's 1968-1982 Corvette Head Lamp and Wiper Door Vacuum System

 

[rocky yo]

Thanks Guys!