Head lights will not go up

When I pull out the head light switch the head lights will not go up. I can make them work if I pull down on the switch under my dash. How do I determine where the problem is. Is it in the head light switch or the vaccine. Where do I start to find the problem or should I say isolate. It.

I am sure this relates to the head light issue but when I turn on the heat or air it will only blow on or feet. Will not. Adjust to blow above on dash or defrost.

Thanks for any help anyone can give me.. My email address is


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Apr 09, 2013
Head lights will not go up
by: Jay

I have a 1975 and the headlights and heater controls are all on vacuum. if you have to pull the plug under the dash it and you can't change the heater direction I would strongly suspect that you have a vacuum leak somewhere. Hope this helps

Dec 30, 2012
Restoration Guide
by: Corvette-web-cental

How to Restore and Modify Your Corvette, 1968-1982 (Motorbooks Workshop)

Third generation Corvettes (1968–1982), commonly known as C3s, are among the most plentiful and affordable Corvettes on the road today. Production spanned 15 years with more than 540,000 examples built, making these the most common of any Corvette body style. Unfortunately, many have fallen into disrepair and are in need of restoration. This book will delve into all of the idiosyncrasies of the C3’s engine, drivetrain, body, chassis, and interior to guide both first time and experienced restorers to a successful conclusion of their project.

* Tips to ensure correct restoration
* Covers every major component
* Decode stampings and part numbers
* Includes accessory codes and production numbers

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