Topic: FRONT HEADLIGHTS
in Forum: C3 Engines
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Canada
Joined: 3/9/2008
Posts: 164
Vette(s): 70 VETTE 350/300HP, AUTOMATIC, ALL STOCK EXCEPT FOR MILD CAM,LAGUNA GREY, 3:55 POSI GEARS
Hi everyone, its been a while since i have been on this site, between kids
and the wife
ive been busy. This past week i hade noticed that when i accelerate really hard my front right side headlight pops up and goes back down, like the car is winking at the other cars,it does not happen all the time, what do i start checking!
and the wifeive been busy. This past week i hade noticed that when i accelerate really hard my front right side headlight pops up and goes back down, like the car is winking at the other cars,it does not happen all the time, what do i start checking!
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Duncanville, TX - USA
Joined: 11/8/2003
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Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
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#2-1985 Bright Red/Carmine Cp.L-98/auto
Member: NCRS, NCRS Texas, Corvette Legends of Texas
The check valve for the system is usually the cause of winkies, but you could also have a problem with that particular headlight vacuum relay.
The check-valve is in the vacuum line, just as it comes off of the engine, behind the carb. It has one line going in, and two coming out. It is basically a one-way valve, allowing vac, to flow in the engine direction, but not the other way. If that valve is leaking, it can cause a loss of vac., and let the headlights, or wiper door to pop open.
The more common problem would be the vac. relay for that headlight.
The check-valve is in the vacuum line, just as it comes off of the engine, behind the carb. It has one line going in, and two coming out. It is basically a one-way valve, allowing vac, to flow in the engine direction, but not the other way. If that valve is leaking, it can cause a loss of vac., and let the headlights, or wiper door to pop open.
The more common problem would be the vac. relay for that headlight.
Joel Adams
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Cramerton, NC - USA
Joined: 8/22/2006
Posts: 1094
Vette(s): black 1982 coupe slate gray interior, 350 crossfire, 1985 fuel pump, Steeroids R&P conversion
Not that I can add anything to Joels wisdom but I agree. It's absence of vacuum to the relay that causes the lights to raise. Check for a loose or cracked vacuum hose going to the top of the relay where the metal nipple is. Crossfire1982 2009-08-08 18:39:20
[QUOTE=F4Gary]I'm glad you narrowed it down to your front headlights. 
[/QUOTE]
Is there another kind of headlight I'm not aware of?? 
[/QUOTE]
Is there another kind of headlight I'm not aware of?? 
I have a friend who has the same problem, sometimes they both go up, then they don't go up at all and I'll have to push em up by hand, then at times one will go up and other won't and visa versa, I've looked everything over and can't seem to find anything wrong, weird, and it only seems to happen in cold weather...any clue's?
Former Member
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Canada
Joined: 3/9/2008
Posts: 164
Vette(s): 70 VETTE 350/300HP, AUTOMATIC, ALL STOCK EXCEPT FOR MILD CAM,LAGUNA GREY, 3:55 POSI GEARS
REPLACED THE VAC. RELAY ON THE RIGHT SIDE, HAD THE CAR OUT ALL DAY, PROBLEM SOLVED, THANKS TO YOU GUYS
Former Member
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Cramerton, NC - USA
Joined: 8/22/2006
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Vette(s): black 1982 coupe slate gray interior, 350 crossfire, 1985 fuel pump, Steeroids R&P conversion
Good deal 
Lifetime MemberModerator
Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20214
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
Am-Fm/map light National/Regional/Chapter NCRS "Top Flight"
#2-1985 Bright Red/Carmine Cp.L-98/auto
Member: NCRS, NCRS Texas, Corvette Legends of Texas
Joel Adams
C3VR Lifetime Member #56
My Link
(click for Texas-sized view!) NCRS
"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
in Forum: C3 Engines
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