Head Light Problem
Thread Starter
Pro
Joined: Jul 2013
Posts: 731
Likes: 64
From: Florida
Head Light Problem
Hi,
I have a 1973 coupe and can not get my head lights to work properly I changed all the vacuum lines the filter and the splitter that attach right off of the intake.
If I take the hose from the vacuum canister and attach to either one if the tubes on the actuator the head lights open and close
Can anyone help?
I have a 1973 coupe and can not get my head lights to work properly I changed all the vacuum lines the filter and the splitter that attach right off of the intake.
If I take the hose from the vacuum canister and attach to either one if the tubes on the actuator the head lights open and close
Can anyone help?
Racer
Joined: Apr 2008
Posts: 406
Likes: 46
From: Lebanon OH
So without a little more detail regarding what the headlights are doing, it's difficult to diagnose. Traditionally, the vacuum relays go bad. There are two of them, one for each headlight, and they are located on the headlight header bar. Their main function is to apply vacuum to one sode or the other of the headlight actuator. They get their signal from the headlight switch. That's a good place to start.
Le Mans Master
Joined: Aug 2006
Posts: 7,431
Likes: 1,561
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
Many time the seal (grommet) in the actuators goes bad.
Here's how to test all the components:
http://www.corvette-101.com/vacuum.htm
Here's how to test all the components:
http://www.corvette-101.com/vacuum.htm
Le Mans Master
Joined: Sep 2003
Posts: 8,812
Likes: 2,029
From: eastern NC
Hi,
I have a 1973 coupe and can not get my head lights to work properly I changed all the vacuum lines the filter and the splitter that attach right off of the intake.
If I take the hose from the vacuum canister and attach to either one if the tubes on the actuator the head lights open and close
Can anyone help?
I have a 1973 coupe and can not get my head lights to work properly I changed all the vacuum lines the filter and the splitter that attach right off of the intake.
If I take the hose from the vacuum canister and attach to either one if the tubes on the actuator the head lights open and close
Can anyone help?
Vacuum Relay Valve
GM Part Number: 5638427
Vacuum relay valve.
1968-82 Headlamp door vacuum relay valve.
https://www.paragoncorvette.com/p-35...lay-valve.aspx
I would start by checking the vacuum lines to your relays for integrity.
If they seem fine, here's a vacuum troubleshooting 'How to' to get you started...
http://www.corvette-101.com/vacuum.htm
Good luck... GUSTO
