1977 Headlight vacuum problems
Thread Starter
Cruising
Joined: Feb 2005
Posts: 12
Likes: 0
From: Athens Alabama
1977 Headlight vacuum problems
I am having problems with the headlights opening. My car has the following new parts installed due to front end damage: air tank, relays (both) and actuators. I have the GM service manual and all of the hoses appear to be connected in the right locations per the color desiginations. I can manually open and close both light assemblys with no problem and they appear to work smoothly without binding. I have not pulled out the dash to access the light switch as of yet but I have listened as close as I can for any vacuum leaks. This car has 47,000 actual miles and I know they are correct since my best friend owned the car from new. Anyway, after the accident he had the car repaired but passed away before everything was finished. I am trying to finish this car as a tribute to him and with your help I know I can do it.
Thanks in advance!
Thanks in advance!
Le Mans Master
Joined: Jul 2005
Posts: 5,752
Likes: 4
From: Austin Texas
Sorry to hear of your friends passing... 
If the vacuum relays were aftermarket, not G.M. originals, I would check them first. I have had many new reproduction units leak badly. Also, make sure you have a strong vacuum at the center large hose at each vacuum relay. G/L
If the vacuum relays were aftermarket, not G.M. originals, I would check them first. I have had many new reproduction units leak badly. Also, make sure you have a strong vacuum at the center large hose at each vacuum relay. G/L
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
http://www.corvette-101.com/
go to vacuum trouble on the side menu, this guy did a great job putting it together for all of us
go to vacuum trouble on the side menu, this guy did a great job putting it together for all of us
