68 dies when I pull the headlight switch.
Thread Starter
Le Mans Master
Joined: Sep 2000
Posts: 9,078
Likes: 7
From: DFW TX
Cruise-In VII Veteran
St. Jude Donor '07
68 dies when I pull the headlight switch.
If I rev it up it will not die. I always thought it was the vaccuum, but all that is leak free. Also will not crank with the **** on.
Any ideas.
Any ideas.
Burning Brakes
Joined: Mar 2008
Posts: 1,038
Likes: 39
From: Denver, CO
St. Jude Donor '08-'09-'10
the alternator would not prevent restarting the car.. if you want to know if the alt is bad, go out start the car, and disconnect the battery, if it stays running your probably good. though, in general i would say, if you car is still starting after several starts, your alternator is probably fine. an overall voltage problem doesnt exactly sound right either.. maybe one of the wires is grounding out?? does it happen with "running lights"/halfway, or all lights/all the way out? what bearing is squeeking, where is the sound coming from? maybe the squeeking is arcing?
good luck!
Josh
good luck!
Josh
Le Mans Master
Joined: Nov 2001
Posts: 8,800
Likes: 1,944
From: LONG ISLAND
2025 C3 ('68-'73) of the Year Finalist - Unmodified
2024 C3 of the Year Finalist - Unmodified
2023 C3 of the Year Finalist - Unmodified
the alternator would not prevent restarting the car.. if you want to know if the alt is bad, go out start the car, and disconnect the battery, if it stays running your probably good. though, in general i would say, if you car is still starting after several starts, your alternator is probably fine. an overall voltage problem doesnt exactly sound right either.. maybe one of the wires is grounding out?? does it happen with "running lights"/halfway, or all lights/all the way out? what bearing is squeeking, where is the sound coming from? maybe the squeeking is arcing?
good luck!
Josh
good luck!
Josh
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
Maybe the ignition is being starved. You could try something simple.
Make a little jumper and clip one end to the pos coil term and the other end to the pos post on alt , start the engine , turn headlights on . (Remove jumper to turn engine off.)
Does your car have one of those white ceramic ballast resistors mounted on the firewall ?
Make a little jumper and clip one end to the pos coil term and the other end to the pos post on alt , start the engine , turn headlights on . (Remove jumper to turn engine off.)
Does your car have one of those white ceramic ballast resistors mounted on the firewall ?
Thread Starter
Le Mans Master
Joined: Sep 2000
Posts: 9,078
Likes: 7
From: DFW TX
Cruise-In VII Veteran
St. Jude Donor '07
This sounds about right for my car. I have always had grounding issues with the dash.
It's funny that you can rev it up and the switch works. Once on the car works fine.
I think the bearing noise is the alt. also. Only makes the noise under load.
It's funny that you can rev it up and the switch works. Once on the car works fine.
I think the bearing noise is the alt. also. Only makes the noise under load.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
