1969 wiper door issue
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Well now I can join the wiper door problem thread, my wiper door worked great until this morning I started my 69 and up pops the wiper door and it will not shut it seems one of the two vacuum hoses which goes to the port closest to the fire wall or the back of canister has constant vacuum .
Is my vette stock?? HAHA
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There is always constant vacuum to the work side. The relay switches it from closed to open. When there is no vacuum to the relay it opens. You either have a leak in the actuator relay, the door open Vacuum plunger switch under the wiper door near the wiper arms or your relay solenoid on the tach is bad or leaking. Most of the time its the first 2 most likely the plung ere r if the door doesnt try to close
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how to test
There is always constant vacuum to the work side. The relay switches it from closed to open. When there is no vacuum to the relay it opens. You either have a leak in the actuator relay, the door open Vacuum plunger switch under the wiper door near the wiper arms or your relay solenoid on the tach is bad or leaking. Most of the time its the first 2 most likely the plung ere r if the door doesnt try to close
Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,216
Likes: 9,354
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
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thanks for the help is there a way to test the vacuum plunger switch and the actuator relay I was working on the wiper motor cuz I have constant power the the wiper motor and I pulled the wiper on off 2 speed switch down a couple of time and maybe damaged the connection at the relay solenoid .
http://repairs.willcoxcorvette.com/?yt=&s=wiper
https://repairs.willcoxcorvette.com/...per+bench+test
https://repairs.willcoxcorvette.com/?yt=&s=wiper+vacuum
For the actuator relay just hook a vacuum pump to the top port applying vacuum while the car is running will pull the plunger up which sends the vacuum to the close side if the actuator. If the vlave is leaking the door may close then open again or not close at all
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wipers
Here is some general searches of the willcox tech section without punching in the year. You can find everything you need here.
http://repairs.willcoxcorvette.com/?yt=&s=wiper
https://repairs.willcoxcorvette.com/...per+bench+test
https://repairs.willcoxcorvette.com/?yt=&s=wiper+vacuum
Thank you very much I watched all the videos last night on how to test looks fairly easy.
For the actuator relay just hook a vacuum pump to the top port applying vacuum while the car is running will pull the plunger up which sends the vacuum to the close side if the actuator. If the vlave is leaking the door may close then open again or not close at all
http://repairs.willcoxcorvette.com/?yt=&s=wiper
https://repairs.willcoxcorvette.com/...per+bench+test
https://repairs.willcoxcorvette.com/?yt=&s=wiper+vacuum
Thank you very much I watched all the videos last night on how to test looks fairly easy.
For the actuator relay just hook a vacuum pump to the top port applying vacuum while the car is running will pull the plunger up which sends the vacuum to the close side if the actuator. If the vlave is leaking the door may close then open again or not close at all
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well I got the wiper door to go up with the manual over ride **** pulled down but it seems my new wiper motor keeps running when I plug it in and the main switch above the center council is not working correctly could it be the wiper door vacuum control solenoid .
Is my vette stock?? HAHA
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From: Im not allowed to tell you
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If the motor doesnt park and stop, then the door wont shut. Mine is doing that. Generally its a bad park switch. Thete is a bench test in tjose links i added. You can do the test without removing the motor. If it works doing the test then its a wiring issue, usually a bad ground
1967 Pedal Car Champion
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From: US-PNW
Well now I can join the wiper door problem thread, my wiper door worked great until this morning I started my 69 and up pops the wiper door and it will not shut it seems one of the two vacuum hoses which goes to the port closest to the fire wall or the back of canister has constant vacuum .
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wiper switch
If the motor doesnt park and stop, then the door wont shut. Mine is doing that. Generally its a bad park switch. Thete is a bench test in tjose links i added. You can do the test without removing the motor. If it works doing the test then its a wiring issue, usually a bad ground
Is my vette stock?? HAHA
Joined: Oct 2015
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From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
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Sounds like the motor might not be the correct one or its wired incorrectly. If everything worked prior and thats all you changed then it should operate. I would recheck all the wiper wiring and make sure something didnt get rerouted
Also forgot to say that if you have the wiper door override pulled it wont shut either...
Also forgot to say that if you have the wiper door override pulled it wont shut either...
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Well I am throwing in the towel there was no ground wire to the switch on dash so I installed one and I ran a ground from motor to frame and when I turn the power on the wiper motor runs the dash switch is not doing anything it's either the switch or the wiper motor itself or could it be the wiper door vacuum control solenoid .
Is my vette stock?? HAHA
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From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
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There is an interlock that controls function but it is on the firewall. Use the bench test procedure and you can work backwards from the motor
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Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,216
Likes: 9,354
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
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its more involved. You can do it in the car with jumper wires.
https://repairs.willcoxcorvette.com/...per+bench+test
https://repairs.willcoxcorvette.com/...per+bench+test
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wiper motor
its more involved. You can do it in the car with jumper wires.
https://repairs.willcoxcorvette.com/...per+bench+test
https://www.youtube.com/watch?v=IKP6xT8FaSw
https://repairs.willcoxcorvette.com/...per+bench+test
https://www.youtube.com/watch?v=IKP6xT8FaSw
Thread Starter
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Joined: Jun 2022
Posts: 78
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From: Nashville
Back to my issue….
wiper solenoid came in and tested. Held vacuum so I swapped it.
Slow leaks found at both override right angle rubber boots that are now removed.
Moving through each system and confirming vacuum is stable. Have made it to the control supply line at the manifold check valve. 25 in/mg has bled down to 10 in/mg after 12 hours. Is that normal? Or have I found a small leak between the check valve and interior T fitting?
wiper solenoid came in and tested. Held vacuum so I swapped it.
Slow leaks found at both override right angle rubber boots that are now removed.
Moving through each system and confirming vacuum is stable. Have made it to the control supply line at the manifold check valve. 25 in/mg has bled down to 10 in/mg after 12 hours. Is that normal? Or have I found a small leak between the check valve and interior T fitting?
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(Just because I'm a wonk* in many ways: mg is the abbreviation for magnesium, hg is mercury.)
*My wife says, "No dear, you're an ***."
Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,216
Likes: 9,354
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
Most of us lose all vacuum over night. You should be fine with that