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

Headlights go on, Interior lights go off.....please help

Thread Tools
 
Search this Thread
 
Old Nov 1, 2005 | 11:05 PM
  #1  
65Elky's Avatar
65Elky
Thread Starter
2nd Gear
 
Joined: Nov 2005
Posts: 2
Likes: 0
Default Headlights go on, Interior lights go off.....please help

Hello there,

I have been helping a friend with repairs on his '77 Vette L82. Its got the 350 engine 350 tranny.

He has this problem that when he turns the headlights on, all dash and guage lights go off and the console guages go towards the negative side, like a short somewhere. All fuses were tested and all were fine. I was told that sometimes the head lamp switch will cause this, i dont see how it zeros out the guages tho. Before i tear into the dash clusters and everything, i was wondering if anyone else heard of this issue, or could give some ideas on doing this dash/console removal bit.

i appreciate it

-justin
Reply
Old Nov 2, 2005 | 08:07 AM
  #2  
Easy Mike's Avatar
Easy Mike
Team Owner
Supporting Lifetime
20 Year Member
 
Joined: Jun 2000
Posts: 38,923
Likes: 1,481
From: Southbound
Cruise-In II Veteran
Default

Sounds like a bad headlight switch to me. I'm betting the rheostat is bad resulting in no guage lights, and possibly shorting out.
Reply
Old Nov 3, 2005 | 03:17 PM
  #3  
65Elky's Avatar
65Elky
Thread Starter
2nd Gear
 
Joined: Nov 2005
Posts: 2
Likes: 0
Default

Thanks for the help i'll check into the head lamp switch
Reply
Old Nov 4, 2005 | 06:07 AM
  #4  
FAZ6799's Avatar
FAZ6799
Cruising
 
Joined: Aug 2005
Posts: 12
Likes: 0
Default

You may also want to check for a ground problem.
Reply
Old Nov 4, 2005 | 01:39 PM
  #5  
73383's Avatar
73383
Instructor
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Jan 2003
Posts: 237
Likes: 0
From: TAMPA FL
Default

sounds like you have a + wire that is grounded and feeding + current back thru your - ground circut

dennis
Reply
Old Nov 4, 2005 | 03:57 PM
  #6  
Boofers's Avatar
Boofers
Drifting
20 Year Member
 
Joined: Nov 2002
Posts: 1,665
Likes: 1
From: Ontario
Default

I'm with Easy Mike, sounds like the headlight switch. See if anything happens with the lights by twisting & banging on the switch. There is a slight chance it is a wiring problem like loose/broken/rusty wires or connections on the switch. I'll put my money on the switch being broken inside & needs to be replaced with a new one.
Reply

Get notified of new replies

To Headlights go on, Interior lights go off.....please help





All times are GMT -4. The time now is 12:59 PM.

story-0
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-1
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-2
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-3
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-4
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-5
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-6
2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-24 16:12:42


VIEW MORE
story-7
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-8
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-9
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