77 Headlights Won't open
Thread Starter
Cruising
Joined: Jan 2012
Posts: 12
Likes: 0
From: Olathe KS
77 Headlights Won't open
I have a 77 vett that i just picked up and from the begining the headlights will not open. i have gone through what i think is 90% of the vacuum lines and found nothing wrong. looks like the guy before me recently replaced them. Is there another way to troubleshoot this issue? would it be a regulator, acuator.... any help would be appreciated.
Thanks
Thanks
Team Owner
Joined: Sep 2006
Posts: 31,160
Likes: 4,241
From: Westminster Maryland
Hi milo,
There are quite a few reasons that your lights flip up....or don't. It's very rarely the vacuum hoses themselves, (unless their not hooked up in the proper way), it's rather the switch, relay or actuators.
If you click on the second 'sticky' at the top of this list of threads, you'll see a link to headlight trouble shooting information.
I'd think you could start by going through that.
Good Luck!
Regards,
Alan
There are quite a few reasons that your lights flip up....or don't. It's very rarely the vacuum hoses themselves, (unless their not hooked up in the proper way), it's rather the switch, relay or actuators.
If you click on the second 'sticky' at the top of this list of threads, you'll see a link to headlight trouble shooting information.
I'd think you could start by going through that.
Good Luck!
Regards,
Alan
Last edited by Alan 71; Jan 7, 2012 at 12:17 PM.
Le Mans Master
Joined: Aug 2006
Posts: 7,413
Likes: 1,552
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
Here's a quick and easy troubleshooting guide.
http://www.corvette-101.com/vacuum.htm
Many times the seal in the actuators is bad so check them first.
http://www.corvette-101.com/vacuum.htm
Many times the seal in the actuators is bad so check them first.
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
This link is very helpful, too.
http://forums.corvetteforum.com/c3-t...tem-works.html
edit: Oops! this is the link that Alan 71 recommended, I should read more carefully.
Scott
http://forums.corvetteforum.com/c3-t...tem-works.html
edit: Oops! this is the link that Alan 71 recommended, I should read more carefully.
Scott
Last edited by scottyp99; Jan 7, 2012 at 03:18 PM.
Thread Starter
Cruising
Joined: Jan 2012
Posts: 12
Likes: 0
From: Olathe KS
After running a few test with a vacuum pump i have come to the conclusion that the left actuator diaphram is bad. do you guys know if one auctator being bad will cause both lights not to raise and lower when switch is pulled?
Thanks for all the help!
Thanks for all the help!
Team Owner
Joined: Jun 2000
Posts: 38,923
Likes: 1,481
From: Southbound
Cruise-In II Veteran
Do the lights open with the over ride?
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Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
Here's a quick and easy troubleshooting guide.
http://www.corvette-101.com/vacuum.htm
Many times the seal in the actuators is bad so check them first.
http://www.corvette-101.com/vacuum.htm
Many times the seal in the actuators is bad so check them first.
Scott
Instructor
Joined: Jan 2012
Posts: 201
Likes: 0
From: some hole in the ground town- camp verde:) arizona
http://www.corvette-101.com/vacuum.htm
i just did a search n came up with this website. hope it helps. explains lots of tests that can be done to determine the cause(s)
i just did a search n came up with this website. hope it helps. explains lots of tests that can be done to determine the cause(s)
