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

What the hell happened!?

Thread Tools
 
Search this Thread
 
Old Apr 6, 2008 | 05:09 PM
  #1  
sperkins's Avatar
sperkins
Thread Starter
Le Mans Master
20 Year Member
Photogenic
Liked
Loved
 
Joined: Oct 2005
Posts: 9,429
Likes: 44
From: Macon, GA
Default What the hell happened!?

1968 vert:
All at once I have:

No brake lights.
No headlights.
No dash lights.

All was working fine the other day when I noticed all the headlights (except 1 drivers side) weren't coming on. I wiggled the wires at each headlight to make sure they were plugged in. After that I have NOTHING.

ALL fuses check fine.

WTF!!!
Reply
Old Apr 6, 2008 | 05:53 PM
  #2  
DZRick's Avatar
DZRick
Le Mans Master
10 Year Member
 
Joined: Jun 2005
Posts: 5,447
Likes: 3
From: Syracuse NY
Default

Have you checked everything in the motor compartment for voltage?

I'd think you either have a big ground problem or the problem lies in the bulkhead connector that connects the fusebox to the forward wiring harness.
Reply
Old Apr 6, 2008 | 06:16 PM
  #3  
sperkins's Avatar
sperkins
Thread Starter
Le Mans Master
20 Year Member
Photogenic
Liked
Loved
 
Joined: Oct 2005
Posts: 9,429
Likes: 44
From: Macon, GA
Default

Originally Posted by DZRick
in the bulkhead connector that connects the fusebox to the forward wiring harness.
That's what I'm leaning towards. I checked for continuity at the fuse block and all is good.

Starting on one thing first, I checked the brake light switch using the (-) battery terminal as ground. It's getting power from the fuse block, but both wires on the switch are hot all the time. I should only be getting power on one side of the switch until the pedal is pressed. This should mean that the lights would stay on all the time - right? But I still have no brake lights - and yes the bulbs are good.

How can I check the bulkhead connector?
Reply
Old Apr 6, 2008 | 07:08 PM
  #4  
DZRick's Avatar
DZRick
Le Mans Master
10 Year Member
 
Joined: Jun 2005
Posts: 5,447
Likes: 3
From: Syracuse NY
Default

The bulkhead connector is next to impossible to get to. I'd just start checking everything in the motor compartment for voltage.

In my car we had one wire pulled out of the bulkhead (couldn't see it) but it was out just enough to prevent my signal lights from working.

As far as your brakes go with power on both sides, yes they should be lite. Is your switch the plunger type 69 up I believe, either way something isn't right there.
Reply
Old Apr 6, 2008 | 07:46 PM
  #5  
sperkins's Avatar
sperkins
Thread Starter
Le Mans Master
20 Year Member
Photogenic
Liked
Loved
 
Joined: Oct 2005
Posts: 9,429
Likes: 44
From: Macon, GA
Default

Switch is not a plunger style. I guess it's a one-year only deal.
I drove the car last weekend for a few hours with someone following me and they said the brake lights worked fine. They went out when the headlight problem came up (my turn signals do still work however). That is what leads me to believe there is a big problem somewhere.
Reply
Old Apr 6, 2008 | 08:44 PM
  #6  
DZRick's Avatar
DZRick
Le Mans Master
10 Year Member
 
Joined: Jun 2005
Posts: 5,447
Likes: 3
From: Syracuse NY
Default

The brake light switch could be out of adjustment but your brakes would constantly be lite if that were the case.

Here's a pic. of the 68 only brake switch.

Reply
Old Apr 6, 2008 | 11:37 PM
  #7  
DZRick's Avatar
DZRick
Le Mans Master
10 Year Member
 
Joined: Jun 2005
Posts: 5,447
Likes: 3
From: Syracuse NY
Default

Has anyone else got any ideas, granted he's got another Vette but you know he wants to drive the 68.
Reply
Old Apr 6, 2008 | 11:42 PM
  #8  
BigBlockTank's Avatar
BigBlockTank
Melting Slicks
 
Joined: Sep 2007
Posts: 2,429
Likes: 0
From: Tucson AZ
Default

Check grounds, continuity. I have a power probe that makes it really easy. You can touch a wire and tell if it's hot or ground. You can also apply power or ground. It makes short work of a real problem. Get one off the tool trucks, Matco, Snap-on, etc.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

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

 Michael S. Palmer
story-1

2027 Corvette vs The World: Every Model vs Closest Competitor

 Joe Kucinski
story-2

10 Most Common Corvette Problems of the Last 20 Years!

 Joe Kucinski
story-3

5 MOST and 5 LEAST Popular Corvette Model Years in History!

 Joe Kucinski
story-4

2027 Corvette Buyer's Guide: Everything You Need to Know!

 Joe Kucinski
story-5

10 Things C8 Corvette Owners Hate (But Won't Tell You)

 Joe Kucinski
story-6

10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!

 Brett Foote
story-7

Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)

 Joe Kucinski
story-8

Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!

 Michael S. Palmer
story-9

5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!

 Joe Kucinski
Old Apr 7, 2008 | 12:38 AM
  #9  
sperkins's Avatar
sperkins
Thread Starter
Le Mans Master
20 Year Member
Photogenic
Liked
Loved
 
Joined: Oct 2005
Posts: 9,429
Likes: 44
From: Macon, GA
Default

Thanks guys. The swith pictured above is the one I have. I just can't figure out why everything went out.
Reply
Old Apr 7, 2008 | 01:10 AM
  #10  
sperkins's Avatar
sperkins
Thread Starter
Le Mans Master
20 Year Member
Photogenic
Liked
Loved
 
Joined: Oct 2005
Posts: 9,429
Likes: 44
From: Macon, GA
Default

Wouldn't a bad headlight switch cause all the following issues?:

No headlights
No tail lights
No dash lights

How do I check that sucker?
Reply
Old Apr 7, 2008 | 01:30 AM
  #11  
DZRick's Avatar
DZRick
Le Mans Master
10 Year Member
 
Joined: Jun 2005
Posts: 5,447
Likes: 3
From: Syracuse NY
Default

Scott, check your PMs and read the last paragraph closely. Sorry for being so long winded. Keepin mind that you now have 12 volts on both sides of your brake switch now too.

Last edited by DZRick; Apr 7, 2008 at 01:32 AM.
Reply
Old Apr 10, 2008 | 12:04 AM
  #12  
sperkins's Avatar
sperkins
Thread Starter
Le Mans Master
20 Year Member
Photogenic
Liked
Loved
 
Joined: Oct 2005
Posts: 9,429
Likes: 44
From: Macon, GA
Default

Anybody got a match?
Reply
Old Apr 10, 2008 | 01:15 AM
  #13  
theandies's Avatar
theandies
Team Owner
20 Year Member
Veteran: Air Force
Community Favorite
Top Answer: 1
 
Joined: Jun 2001
Posts: 23,353
Likes: 1,054
From: Virginia USA
Default

Originally Posted by sperkins
Anybody got a match?
Don't torch it, I'll take it off your hands.
Sounds like the connector came off your headlamp switch to me.
Reply

Get notified of new replies

To What the hell happened!?





All times are GMT -4. The time now is 01:13 PM.

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