Need '72 Wiper Door Help

Right_D

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Joined
Jul 17, 2012
Messages
5
Have searched the forum (as well as others) and still not been able to find anything helpful.

I just bought a '72 and the Wiper Door will not open. The headlights do work fine (both from the switch and at the over-ride), and the door can be opened by lifting up on it (or by manually pushing the rod in the actuator), so nothing is broken or binding.

The door actuator appears to be new and feels "good" when manually pushing the rod.

The rod seal is good and in place. All of the vacuum hoses appear to be newer and in good shape.

I replaced the vacuum relay just for grins.

I have reviewed several different vacuum diagrams and triple-checked to make sure all of my hoses are hooked up correctly.

If I was leaking vacuum, I believe that door would stay up all of the time. I have also unplugged the small, black hose from the relay with the engine running as I believe this should cause the door to open, but it had no effect.

One thing I did notice was that the small black hose did not seem to have very much "suction" to it when I unplugged it. I don't have any kind of gauge to measure the vacuum, I just put my thumb over it, but it felt pretty weak. Again, if this was the problem, wouldn't this keep the door open instead of closed though?
 
Thanks for the input. I did see this and I was thinking of replacing the solenoid just to be thorough, but if this is the issue, wouldn't the over-ride still work?
 
Welcome to the motley crew.....


You will find better tech help here for anything concerning your vette......

of any generation.....this is where the engineers hang out.....

:cool::friends:
 
Thanks for the input. I did see this and I was thinking of replacing the solenoid just to be thorough, but if this is the issue, wouldn't the over-ride still work?

Not sure but isnt the wiper door stay open by default when no vaccum?
I might be wrong.
Yours doesnt open, soo not much left than the electrics.
 
Yea, I guess that's true.. I'll get it replaced and report back if that changes anything.
 
You should see 4 hoses on your vacuum relay, 3 of them about 1/2" OD, one of them is the small controller hose, take the 3 larger hoses off the relay, and see which one has vacuum on it with engine running, and apply that hose to one side and the other of the vacuum actuator directly....in one position or other the actuator should open the door, if not, you have a bad actuator,...I think I still have one off my '72.....

:beer:
 
Thanks for the input. I'll be out of town through next weekend, but I'll get back to work on it sometime the following week. I'll post my results (and probably ask for some more advice along the way.
 

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