C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

help, 77 headlight problem

Thread Tools
 
Search this Thread
 
Old Mar 31, 2016 | 08:33 PM
  #1  
chris77vette's Avatar
chris77vette
Thread Starter
5th Gear
 
Joined: Feb 2016
Posts: 5
Likes: 0
Default help, 77 headlight problem

When I start the car the headlights pop up and stay up. The headlight switch is off. where might my vacuum problem be?
Reply
Old Mar 31, 2016 | 08:43 PM
  #2  
Giant_Robot's Avatar
Giant_Robot
Racer
 
Joined: Jan 2014
Posts: 287
Likes: 8
Default

yes.
Reply
Old Mar 31, 2016 | 08:45 PM
  #3  
Giant_Robot's Avatar
Giant_Robot
Racer
 
Joined: Jan 2014
Posts: 287
Likes: 8
Default

hahah, jk man, could be anywhere, start with your check valve and move from there.
check valve, then your vacuum tank, then your relays, then the actuators.
buy a hand vacuum tool, then you can test your actuators and relay vacuum with the engine not running.
Reply
Old Mar 31, 2016 | 10:16 PM
  #4  
Peterbuilt's Avatar
Peterbuilt
Le Mans Master
15 Year Member
 
Joined: Aug 2006
Posts: 7,411
Likes: 1,550
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
Default Hi and Welcome.

Is the 'pull down' switch in the UP position?

http://www.corvette-101.com/vacuum.htm#override
Reply
Old Apr 1, 2016 | 12:09 AM
  #5  
Strokemyaxe's Avatar
Strokemyaxe
Burning Brakes
10 Year Member
Photogenic
Liked
Loved
 
Joined: Jul 2014
Posts: 831
Likes: 54
From: Arlington TX
Default

What peterbuilt said. Then, check actuator relays for correct connection.

Do the lights go down when you pull the **** out to the on position?
Reply

Get notified of new replies

To help, 77 headlight problem





All times are GMT -4. The time now is 09:20 AM.

story-0
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-1
2027 Corvette vs The World: Every Model vs Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-20 17:58:41


VIEW MORE
story-2
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE
story-3
5 MOST and 5 LEAST Popular Corvette Model Years in History!

Slideshow: 5 most and least popular Corvette model years.

By Joe Kucinski | 2026-04-08 13:25:01


VIEW MORE
story-4
2027 Corvette Buyer's Guide: Everything You Need to Know!

Slideshow: 2027 Corvette buyer's guide

By Joe Kucinski | 2026-04-17 16:41:08


VIEW MORE
story-5
10 Things C8 Corvette Owners Hate (But Won't Tell You)

Slideshow: 10 things C8 Corvette owners hate, but won't tell you.

By Joe Kucinski | 2026-04-01 18:36:07


VIEW MORE
story-6
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!

Slideshow: Should you add one of these incredible Corvettes to your garage?

By Brett Foote | 2026-04-01 18:14:05


VIEW MORE
story-7
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)

Slideshow: Every Corvette Grand Sport explained

By Joe Kucinski | 2026-03-26 07:13:44


VIEW MORE
story-8
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!

Slideshow: Breaking down the 2027 Grand Sport, Grand Sport X, Stingray, and LS6 V8.

By Michael S. Palmer | 2026-03-26 13:48:45


VIEW MORE
story-9
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!

Slideshow: 5 reasons bad drivers crash sports cars & 5 ways to avoid a costly shame!

By Joe Kucinski | 2026-03-25 16:32:55


VIEW MORE