Wiper Door
Thread Starter
Melting Slicks
Joined: May 2009
Posts: 2,209
Likes: 634
From: Port St Lucie Florida
2025 C6 of the Year Finalist - Modified
2023 C6 of the Year Finalist - Modified
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2021 C6 of the Year Finalist - Modified
Wiper Door
The wiper door on my 69 is stuck in the "up" position. What might be causing this and how do I troubleshoot/repair? As always, my thanks in advance.
Le Mans Master
Joined: Dec 2003
Posts: 5,727
Likes: 38
From: Fremont CA
There is a vacuum switch the Pass side wiper arm depresses when it is fully lowered in the "park" position. The switch is prone to failing due to age, 3 vacuum lines are connected to it, one is actually a vent line and the other 2 are in the wiper door vacuum control circuit. Here is a link to Wilcox Corvette for the part. It is located under the grille ahead of the wiper door.
Link: http://willcoxcorvette.com/product_i...oducts_id=4813
Link: http://willcoxcorvette.com/product_i...oducts_id=4813
Racer
Joined: Nov 2009
Posts: 423
Likes: 7
From: Utah
Here's a link to my post. I just installed mine which was missing. Page 2 has my pics.
http://forums.corvetteforum.com/c3-g...rol-valve.html
http://forums.corvetteforum.com/c3-g...rol-valve.html
Last edited by shrekviper; May 9, 2011 at 01:46 AM.
Team Owner
Joined: Sep 2006
Posts: 31,197
Likes: 4,287
From: Westminster Maryland
Hi jm,
Have you checked to see the vacuum over-ride switch under the dash at the steering column didn't get pulled by accident. It makes the door stay up all the time.
It's the one on the right.
Regards,
Alan
Have you checked to see the vacuum over-ride switch under the dash at the steering column didn't get pulled by accident. It makes the door stay up all the time.
It's the one on the right.
Regards,
Alan
Thread Starter
Melting Slicks
Joined: May 2009
Posts: 2,209
Likes: 634
From: Port St Lucie Florida
2025 C6 of the Year Finalist - Modified
2023 C6 of the Year Finalist - Modified
2022 C6 of the Year Finalist - Modified
2021 C6 of the Year Finalist - Modified
Hey Guys - thanks for the responses and the links. Possible Alan, that the switch is open but I don't think so (did look at it Saturday but will check again) Perhaps the switch is shorting out? One last request...do any of you guys have a diagram showing proper hose alignment?
Melting Slicks
Joined: Apr 2007
Posts: 3,189
Likes: 111
From: Tolland CT
Hey Guys - thanks for the responses and the links. Possible Alan, that the switch is open but I don't think so (did look at it Saturday but will check again) Perhaps the switch is shorting out? One last request...do any of you guys have a diagram showing proper hose alignment?
Going from memory, it's a two hose connector.
If it doesn't work one way, try the other.
Is the door actually stuck as in frozen or is it being opened by vacuum?
Other place to check may be the control unit under the hood and vacuum hoses going to the valve in the wiper trough. There's a valve which prevents closing the door until the wipers are parked. The right hand wiper arm presses on this valve when the arm is parked.
Instructor
Joined: Sep 2008
Posts: 216
Likes: 0
From: Eugene OR
The "wiper down" depression switch under my wiper door has colored dots on the three hose nipples. I just matched them to the colored stripes on my vacuum lines.
Hope that helps!
Hope that helps!
Last edited by Schaggy; May 10, 2011 at 03:48 PM.
Melting Slicks
Joined: Apr 2007
Posts: 3,189
Likes: 111
From: Tolland CT
Another thought would be to check the hoses and connector going to the solenoid on the back of the tachometer.
Check the connections to the vacuum control relay under the hood. It's located near the power brake booster on my 70. Not sure of other years.
Check the connections to the vacuum control relay under the hood. It's located near the power brake booster on my 70. Not sure of other years.
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Thread Starter
Melting Slicks
Joined: May 2009
Posts: 2,209
Likes: 634
From: Port St Lucie Florida
2025 C6 of the Year Finalist - Modified
2023 C6 of the Year Finalist - Modified
2022 C6 of the Year Finalist - Modified
2021 C6 of the Year Finalist - Modified
Great information! Thanks everyone!!