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1969 Wiper door issue

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Old Aug 15, 2010 | 01:35 PM
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From: Eagan MN
Default 1969 Wiper door issue

a couple of vacum lines came loose but before I discovered that I was trying the override and I seem to have messed things up. Here are the problems. 1) The overide switch works but is backwards - down is closed, when up should be closed. 2) when I turn the wipers on the door doesn't open, I open the door with the overide, turn on the wipers and the door closes on the wipers. I have something backwards and can't figure it out. They worked fine before the lines came loose and I messed with things.
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Old Aug 15, 2010 | 02:36 PM
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Hi D,
Where were the hoses that came loose? Under the dash or in the engine compartment?
Regards,
Alan
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Old Aug 15, 2010 | 04:20 PM
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I've got a good set of the vacuum schematics at this link.. it shows the position of each hose... http://willcoxcorvette.com/repairand...lp.php?hID=280

Willcox
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Old Aug 15, 2010 | 10:29 PM
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From: Eagan MN
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they where in the engine compartment attached to the actuator relay valve. the green was to go on the bottom and the red on the top. I switched them today and it solved the problem, but doesn't seem right. Another post gave me a link to a vacum diagram. I will have to trace and see if mine matches up.

Last edited by DCLMN; Aug 15, 2010 at 10:35 PM.
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Old Aug 15, 2010 | 10:30 PM
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Thanks for the diagrams, I will do some tracing tomorrow and see what I find out.

Last edited by DCLMN; Aug 15, 2010 at 10:35 PM.
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Old Aug 15, 2010 | 11:03 PM
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NP Dclmn...

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Old Sep 8, 2010 | 06:21 PM
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I am also having an issue with the wiper door. I had my windshield replaced recently and did a lot of cleanup work in the wiper bucket. I believe I have all the hoses back in the correct locations, but the door will not stay closed. What tells the wiper door to open other then the wiper switch or the bypass switch under the steering column?
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Old Sep 8, 2010 | 06:30 PM
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Originally Posted by 69'Silver
What tells the wiper door to open other then the wiper switch or the bypass switch under the steering column?
No vacuum at the small port on the wiper door relay will tell the door to open.

edit - just a guess but the vacuum switch under the pass wiper arm is probably out of adjustment

Last edited by ...Roger...; Sep 8, 2010 at 06:32 PM.
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Old Sep 8, 2010 | 06:35 PM
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Originally Posted by ...Roger...
No vacuum at the small port on the wiper door relay will tell the door to open.
Thanks for the quick reply. You are referring to the relay valve in the fender ( I have a nonAC early69) and not the interlock valve that is closed by the wiper linkage. Correct

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Old Sep 8, 2010 | 06:46 PM
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What you have pictured is of course the relay and the small port NEEDS vacuum to close the door , no vacuum and the door opens.
But the small 3 port valve (interlock valve)that is mounted under the passenger wiper arm is in the path of vacuum going to the relay. If the pass wiper arm is not going down far enough the 3 port valve will stop the vacuum and the door will stay up.
The 3 port interlock valve I'm referring to is in the upper left corner.

Last edited by ...Roger...; Sep 8, 2010 at 07:29 PM.
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