wiper door opening
Thread Starter
Racer
Joined: Sep 2017
Posts: 337
Likes: 56
wiper door opening
Hello, hopefully I'm posting in the right spot. My situation is that with my 69 when I shut the car off and with in about 1/2 a minute the wiper door opens, only about a 1/4 inch. When I restart the car it closes back up.
I tried the "15 second test" , pinching off the small vacuum line downstream of the check valve and the door did open, indicating a bad vacuum safety switch? In reading previous posts I'm not sure if this could a slight opening of the door when shutting down. Any suggestions as to why it opens when motor was just turned off would be greatly appreciated. Thanks
I tried the "15 second test" , pinching off the small vacuum line downstream of the check valve and the door did open, indicating a bad vacuum safety switch? In reading previous posts I'm not sure if this could a slight opening of the door when shutting down. Any suggestions as to why it opens when motor was just turned off would be greatly appreciated. Thanks
Former Vendor
Joined: Aug 2006
Posts: 76,656
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From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
More than likely your issue is the wiper arm vacuum switch.
If the door opens, it's most commonly due to a faulty wiper arm vacuum switch at the passenger side wiper arm or a loose hose at this switch. When vacuum falls from this switch the door by default is to open so the issue is most commonly on the small hose side at this switch. It sounds as if your are losing vacuum on the small hose side and maintaining vacuum on the large hose side briefly.
You could also check the connection at the over-ride switch under the dash.... either of the two could be leaking vacuum causing this issue.
https://willcoxcorvette.com/corvette...t-really-works
You'll find more info at this link http://repairs.willcoxcorvette.com/?yt=1969&s=vacuum
Willcox
If the door opens, it's most commonly due to a faulty wiper arm vacuum switch at the passenger side wiper arm or a loose hose at this switch. When vacuum falls from this switch the door by default is to open so the issue is most commonly on the small hose side at this switch. It sounds as if your are losing vacuum on the small hose side and maintaining vacuum on the large hose side briefly.
You could also check the connection at the over-ride switch under the dash.... either of the two could be leaking vacuum causing this issue.
https://willcoxcorvette.com/corvette...t-really-works
You'll find more info at this link http://repairs.willcoxcorvette.com/?yt=1969&s=vacuum
Willcox
