Topic: headlights open at start up???/
in Forum: C3 General Discussion
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hi
i need some help. when i start the car my headlights open then close. i have just replaced the 2 relays, check valve, filter and override switch. they did not do this before they were just very lazy. any suggestions would be a help. it is a 74 454
thanks
phil
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DON'T KNOW IF THIS HELPS BUT CHECK THE SWITCHES UP UNDER THE DASH, THERE IS ONE THEY IS, IF I REMEBER, ON THE FIREWALL OR THE TACH, HARD TO FIND REPLACEMENT PART, GOT MINE FROM BLAIRS, I THINK. ANYWAY I HAD SAME ISSUE EXCEPT IT WAS MY WIPER DOOR, AFTER SERVERAL DOLLARS AND A SHOP THAT TOOK THE TIME, GET ALL MY VAC HOSES CORRECT AND FOUND SWITCH UNDER DASH WAS THE CULPRIT. GOOD LUCK HOPE IT HELPS, KNOW THAT ARE MANY HERE WITH DEEPER KNOWLEDGE, WELCOME TO THE WEBSITE.
thanks for the help, and nice car
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
Are you saying they did NOT do this before you changed all the parts?
If the check valve is bad, the headlights would raise when you turn the engine off.
If the vaccuum lines are not connected to the relay valves properly, or if the valves are faulty, it could cause this.
The vac. lines on the relay valves should be:
Red on top
Yellow in the center
Green on bottom
Yellow is the main vac. source from the reservoir.
Red goes to the rear (hood side) of the actuators
Green goes to the front(bumper side) of the actuators.
If the check valve is bad, the headlights would raise when you turn the engine off.
If the vaccuum lines are not connected to the relay valves properly, or if the valves are faulty, it could cause this.
The vac. lines on the relay valves should be:
Red on top
Yellow in the center
Green on bottom
Yellow is the main vac. source from the reservoir.
Red goes to the rear (hood side) of the actuators
Green goes to the front(bumper side) of the actuators.
Joel Adams
C3VR Lifetime Member #56 
My Link 
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
no they did not do this before i changed the parts they were just very lazy. i did not check the new relays before i installed them.
phil
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
So....yer sayin YOU caused this, eh? 
Double-check all yer vac. fittings for correct placement first. I have some vac. trouble-shooting info I can send you, if you need it. P/M me if you do...
Double-check all yer vac. fittings for correct placement first. I have some vac. trouble-shooting info I can send you, if you need it. P/M me if you do...
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"
well i guess i caused it, thats my luck. it looks like all the hoses are where they should be.
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
If the hoses are all in the correct locations, then the check-valve, or the relay valves are not operating properly. It could be the hoses on the over-ride valve...maybe.
I sent you a P/M...the diagrams will be on their way in aboot 16 minutes and 38 seconds!
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"
joel
i tried two check valves, the relays are new, but i guess they could be bad.
phil
I had replaced the origional check valve on mine once and had similar problem. Took old valve and sprayed with wd 40 then put it back and cured door opening trouble. Lazy light was small hole in last light to open.
in Forum: C3 General Discussion
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