Headlight pop's up
Thread Starter
Instructor
Joined: Jun 2008
Posts: 201
Likes: 0
From: Palm Coast Florida
Headlight pop's up
When I shut my car off, the right headlight pop's about 3/4 of the way up. Sometimes it slowly lowers back to the closed position, sometimes it stays up. Anybody know if that is a problem with the actuator relay or the headlight actuator?
Melting Slicks
Joined: Apr 2002
Posts: 2,337
Likes: 14
From: Norfolk VA
There is a sticky with a good write up on how the headlight system works and there is also a troubleshooting link in the forum archives. I have a similar issue. On my vehicle the passenger head light pops up minutes (as much as 10) after the drivers side headlight comes up. When I turn them off, the passenger side light goes down first then the driver's side. I have only seen one C3 corvette in which the headlights come up and down at the same time.... It was a 68 I was looking over for someone in Florida.
Last edited by Oldguard 7; Jan 25, 2011 at 12:53 AM.
Race Director
Joined: Feb 2006
Posts: 12,239
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From: Chino CA
Race Director
Joined: May 2006
Posts: 16,528
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From: Dayton, Ohio
With the car running take a pair of pliers and pinch the small hose feeding the 2 relays,see if it pops up.
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Race Director
Joined: May 2006
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From: Dayton, Ohio
Have you done this quick and easy test for the Control side ?
http://forums.corvetteforum.com/c3-g...inch-test.html
http://forums.corvetteforum.com/c3-g...inch-test.html
Le Mans Master
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From: mount holly NC
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Team Owner
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From: Westminster Maryland
Hi East,
I just read this thread, and your post.
In your case I think that at 5500 rpm in 4th gear your headlight doors are too afraid to continue and just want to be let off this ride.
Regards,
Alan
I just read this thread, and your post.
In your case I think that at 5500 rpm in 4th gear your headlight doors are too afraid to continue and just want to be let off this ride.
Regards,
Alan
Drifting
Joined: Jul 2006
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From: Sault Ste. Marie Ontario
Instructor
Joined: Apr 2010
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From: Lakeland FL
HELLLLPPPPP!!!
I've replaced all of the vacuum hoses, the check valve, and the switch. If I hook everything up, both headlights pop up.....nice and quick and almost simultaneously, but that's not what I want. My switch is in the off position and the override is up. Again, I've replaced each and every hose from dash to the lights. The only way to keep them down is to disconnect the hose from the check valve to the tank. Of course I plug the vacuum leak.
I have read the "How Your Headlight Vacuum System Works" which is an awesome reference.
I'm thinking about throwing $1K at it and removing this vacuum system in favor of a full electric pop-up system. Can you feel how pissed off/frustrated I am????
I've replaced all of the vacuum hoses, the check valve, and the switch. If I hook everything up, both headlights pop up.....nice and quick and almost simultaneously, but that's not what I want. My switch is in the off position and the override is up. Again, I've replaced each and every hose from dash to the lights. The only way to keep them down is to disconnect the hose from the check valve to the tank. Of course I plug the vacuum leak.
I have read the "How Your Headlight Vacuum System Works" which is an awesome reference.
I'm thinking about throwing $1K at it and removing this vacuum system in favor of a full electric pop-up system. Can you feel how pissed off/frustrated I am????
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
HELLLLPPPPP!!!
I've replaced all of the vacuum hoses, the check valve, and the switch. If I hook everything up, both headlights pop up.....nice and quick and almost simultaneously, but that's not what I want. My switch is in the off position and the override is up. Again, I've replaced each and every hose from dash to the lights. The only way to keep them down is to disconnect the hose from the check valve to the tank. Of course I plug the vacuum leak.
I have read the "How Your Headlight Vacuum System Works" which is an awesome reference.
I'm thinking about throwing $1K at it and removing this vacuum system in favor of a full electric pop-up system. Can you feel how pissed off/frustrated I am????
I've replaced all of the vacuum hoses, the check valve, and the switch. If I hook everything up, both headlights pop up.....nice and quick and almost simultaneously, but that's not what I want. My switch is in the off position and the override is up. Again, I've replaced each and every hose from dash to the lights. The only way to keep them down is to disconnect the hose from the check valve to the tank. Of course I plug the vacuum leak.
I have read the "How Your Headlight Vacuum System Works" which is an awesome reference.
I'm thinking about throwing $1K at it and removing this vacuum system in favor of a full electric pop-up system. Can you feel how pissed off/frustrated I am????
edit-vacuum on the small hose at the relay tells the lights to stay down,no vac on the small hose tells the headlights to pop up
Last edited by ...Roger...; Jan 31, 2011 at 07:48 PM.
Racer
Joined: Feb 2007
Posts: 271
Likes: 25
From: Buena Vista Colorado
I think there are only 4 possibilities:
"...Roger..." points out the most likely one: Hose connections reversed at the actuators.
Reversed connections of the SAME hoses at the relays is another.
The third is failure to connect the hose running from the pull-down bypass switch to the tops of the relays through a "T" connector right next to the relays.
Fourth is the complete failure of the diaphragm in the top of one or both of the relays such that they cannot hold a vacuum. Easy to check using a vacuum pump at each relay's small top port.
Let's get this fixed! Sure hate to see anyone dump $1K unnecessarily.
