Headlights go up??
Le Mans Master
Joined: Sep 2000
Posts: 9,078
Likes: 7
From: DFW TX
Cruise-In VII Veteran
St. Jude Donor '07
When you start the car it has no affect on the headlights unless something is wrong with your switches. The engine is only a pump to pull vacuum. If the headlights are going up, it is probably one or two things. The headlight switch is bad or the override switch is engaged.
BTW - The check valve only prevents bleed down of the vacuum in the system.
This is all pending everything is plumbed correctly.
BTW - The check valve only prevents bleed down of the vacuum in the system.
This is all pending everything is plumbed correctly.
Thread Starter
Pro
Joined: Jan 2007
Posts: 589
Likes: 0
How do I check the override switch.
My HL switch is in and the OR switches are pushed in as well.
I dont know if its plumbed correctly.
Theres a vaccum from the intake going to the ck valve and two comming off the other side..
My HL switch is in and the OR switches are pushed in as well.
I dont know if its plumbed correctly.
Theres a vaccum from the intake going to the ck valve and two comming off the other side..
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Racer
Joined: Mar 2005
Posts: 487
Likes: 0
From: Jacksonville FL
look for a long skinny **** (about 1/4"x1-1/4") down by your knees. can't remember which way is which, but push up or pull down on it and see if that fixes you problem. should be by your left knee.
Le Mans Master
Joined: Sep 2000
Posts: 9,078
Likes: 7
From: DFW TX
Cruise-In VII Veteran
St. Jude Donor '07
Here is how it should work.
The big line coming from the check valve goes to a storage tank to store vacuum. The small line goes to the switches. It usually splits under the dash for the wiper door. When you pull the headlight switch out it sends vacuum to the relay. The relay (vacuum operated) will signal the doors to open. The overide switch is between the headlight switch and the relay. When pulled down it does the same thing as the headlight switch, but does not turn the lights on.
Sounds like you are getting vacuum to the relays and it is opening the headlights. I assume the bulbs are not burning when you start the car.
The big line coming from the check valve goes to a storage tank to store vacuum. The small line goes to the switches. It usually splits under the dash for the wiper door. When you pull the headlight switch out it sends vacuum to the relay. The relay (vacuum operated) will signal the doors to open. The overide switch is between the headlight switch and the relay. When pulled down it does the same thing as the headlight switch, but does not turn the lights on.
Sounds like you are getting vacuum to the relays and it is opening the headlights. I assume the bulbs are not burning when you start the car.
Thread Starter
Pro
Joined: Jan 2007
Posts: 589
Likes: 0
Thread Starter
Pro
Joined: Jan 2007
Posts: 589
Likes: 0