C4 General Discussion General C4 Corvette Discussion not covered in Tech

Lights flickering problem , video inside

Thread Tools
 
Search this Thread
 
Old Jan 17, 2013 | 03:48 PM
  #1  
Mohammed_z's Avatar
Mohammed_z
Thread Starter
Drifting
15 Year Member
Liked
 
Joined: Jan 2010
Posts: 1,624
Likes: 48
From: Saudi Arabia
Default Lights flickering problem , video inside

I don't see other problems in the car , but the flickering itself is annoying if I think about it, or just keep looking at the dash playing with idle to see if it's gone or not.

What are possible things that cause this flickering ?



Last edited by Mohammed_z; Jan 17, 2013 at 03:52 PM.
Reply
Old Jan 17, 2013 | 04:38 PM
  #2  
eaglevision993's Avatar
eaglevision993
Racer
 
Joined: Sep 2010
Posts: 305
Likes: 2
From: Epfenbach BW
Default

Hi,
I had a similar problem that was caused by a the wire going to the positive battery connector.

But the most common cause is the voltage regualtor in the alternator. I replaced the battery and alternator just to find out that my problem was only a loose connection so check the easy and cheap stuff first.

Does it only flicker with the engine running?

Best regards
Benjamin
Reply
Old Jan 17, 2013 | 05:09 PM
  #3  
Mohammed_z's Avatar
Mohammed_z
Thread Starter
Drifting
15 Year Member
Liked
 
Joined: Jan 2010
Posts: 1,624
Likes: 48
From: Saudi Arabia
Default

Originally Posted by eaglevision993
Hi,
I had a similar problem that was caused by a the wire going to the positive battery connector.

But the most common cause is the voltage regualtor in the alternator. I replaced the battery and alternator just to find out that my problem was only a loose connection so check the easy and cheap stuff first.

Does it only flicker with the engine running?

Best regards
Benjamin

Yes , only when the engine running. I hope it just a cheap fix !!
Reply
Old Jan 17, 2013 | 05:53 PM
  #4  
mrmtrtrnd's Avatar
mrmtrtrnd
Race Director
Supporting Lifetime
10 Year Member
 
Joined: Sep 2008
Posts: 10,777
Likes: 5
From: Wichita Ks
Default

My dash lights flicker just a little and have from the day I bought the car. I agree with 993 that the most common problem is the regulator but not the only cause. I don't know what parts cost there but if it is the alternator it shouldn't cost to much. Hope it is a easy and cheap fix.
Forgot to add if it is the regulator inside the alternator you can buy that part and change it your self without buying the entire alternator.

Last edited by mrmtrtrnd; Jan 17, 2013 at 06:05 PM.
Reply
Old Jan 17, 2013 | 07:07 PM
  #5  
eaglevision993's Avatar
eaglevision993
Racer
 
Joined: Sep 2010
Posts: 305
Likes: 2
From: Epfenbach BW
Default

Could also be a loose ground somewhere, but have the alternator and battery checked out.
A weak battery may also cause this.
Reply
Old Jan 18, 2013 | 01:46 AM
  #6  
Mohammed_z's Avatar
Mohammed_z
Thread Starter
Drifting
15 Year Member
Liked
 
Joined: Jan 2010
Posts: 1,624
Likes: 48
From: Saudi Arabia
Default

Originally Posted by mrmtrtrnd
My dash lights flicker just a little and have from the day I bought the car. I agree with 993 that the most common problem is the regulator but not the only cause. I don't know what parts cost there but if it is the alternator it shouldn't cost to much. Hope it is a easy and cheap fix.
Forgot to add if it is the regulator inside the alternator you can buy that part and change it your self without buying the entire alternator.
That's a good idea , I will try to search for the regulator. Thanks


Originally Posted by eaglevision993
Could also be a loose ground somewhere, but have the alternator and battery checked out.
A weak battery may also cause this.

I will test them both , but does a bad regulator drains the battery ? Because I dont feel the battery is weak !
Reply
Old Jan 18, 2013 | 01:52 AM
  #7  
DinoBob's Avatar
DinoBob
Melting Slicks
15 Year Member
Liked
Loved
Top Answer: 1
 
Joined: Apr 2011
Posts: 3,493
Likes: 475
From: New Jersey
Default

Please check the terminal block behind the battery, where all the hot feeds are connected. Mine was in need of replacement. Gladi caught it. Could easily have led to a fire. Same symptoms.
Reply
Old Jan 18, 2013 | 01:56 AM
  #8  
Mohammed_z's Avatar
Mohammed_z
Thread Starter
Drifting
15 Year Member
Liked
 
Joined: Jan 2010
Posts: 1,624
Likes: 48
From: Saudi Arabia
Default

Originally Posted by DinoBob
Please check the terminal block behind the battery, where all the hot feeds are connected. Mine was in need of replacement. Gladi caught it. Could easily have led to a fire. Same symptoms.

I don't know which terminal you're talking about , do you mean the small fuse box ?
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-1

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-2

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-3

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
story-4

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

 Joe Kucinski
story-5

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-6

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-7

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-8

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-9

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

 Michael S. Palmer
Old Jan 18, 2013 | 04:57 AM
  #9  
Mohammed_z's Avatar
Mohammed_z
Thread Starter
Drifting
15 Year Member
Liked
 
Joined: Jan 2010
Posts: 1,624
Likes: 48
From: Saudi Arabia
Default

Is it ok if I installed a higher amp alternator ?
Reply
Old Jan 19, 2013 | 01:21 PM
  #10  
Mohammed_z's Avatar
Mohammed_z
Thread Starter
Drifting
15 Year Member
Liked
 
Joined: Jan 2010
Posts: 1,624
Likes: 48
From: Saudi Arabia
Default Update

UPDATE


I removed the alternator , replaced the voltage regulator and the laminated core.

Started the car and the flickering is still there. I think I just wasted some money and I should replace the rectifier now , if i'm not mistaken !!!! , I'm an electrician I know the rectifier has diodes and I didn't have a multimeter to check it , took it to a car electrician and after a while he told me it's fine. It doesn't need to be replaced !!



voltage regulator




core





This is a pic of a rectifier , but it's for another car (just to show how it looks) it's almost the same.


Last edited by Mohammed_z; Jan 19, 2013 at 01:24 PM.
Reply
Old Jan 19, 2013 | 01:23 PM
  #11  
DinoBob's Avatar
DinoBob
Melting Slicks
15 Year Member
Liked
Loved
Top Answer: 1
 
Joined: Apr 2011
Posts: 3,493
Likes: 475
From: New Jersey
Default

Did you check the terminal block?
Reply
Old Jan 19, 2013 | 01:24 PM
  #12  
DinoBob's Avatar
DinoBob
Melting Slicks
15 Year Member
Liked
Loved
Top Answer: 1
 
Joined: Apr 2011
Posts: 3,493
Likes: 475
From: New Jersey
Default

Check behind the battery for it. It is almost right up against the firewall. All the hot feeds run to it.
Reply
Old Jan 19, 2013 | 01:26 PM
  #13  
Mohammed_z's Avatar
Mohammed_z
Thread Starter
Drifting
15 Year Member
Liked
 
Joined: Jan 2010
Posts: 1,624
Likes: 48
From: Saudi Arabia
Default

Originally Posted by DinoBob
Check behind the battery for it. It is almost right up against the firewall. All the hot feeds run to it.

There is a small fuse box there !! Do I need to remove the battery to see this terminal block ?? Can you show me a pic of that ?
Reply
Old Jan 20, 2013 | 10:19 AM
  #14  
mrmtrtrnd's Avatar
mrmtrtrnd
Race Director
Supporting Lifetime
10 Year Member
 
Joined: Sep 2008
Posts: 10,777
Likes: 5
From: Wichita Ks
Default

Sorry my bad in my first post I should have added start with connections first then move to the regulator. While the regulator is a common problem so are faulty connections like bad grounds. They are the source of many electrical problems in these cars. I'm trying to trace down a problem in my car and in doing so have found corroded connections and some corroded fuses like I've never seen before. These weren't my problem but would have caused issues in the future.
Reply
Old Jan 20, 2013 | 02:21 PM
  #15  
Mohammed_z's Avatar
Mohammed_z
Thread Starter
Drifting
15 Year Member
Liked
 
Joined: Jan 2010
Posts: 1,624
Likes: 48
From: Saudi Arabia
Default

Originally Posted by mrmtrtrnd
Sorry my bad in my first post I should have added start with connections first then move to the regulator. While the regulator is a common problem so are faulty connections like bad grounds. They are the source of many electrical problems in these cars. I'm trying to trace down a problem in my car and in doing so have found corroded connections and some corroded fuses like I've never seen before. These weren't my problem but would have caused issues in the future.

Are you having the same issue ?

I'm trying to figure out the terminal that DinoBob mentioned but I'll have some time next weekend so I change the rectifier and search for this terminal.
Reply
Old Jan 20, 2013 | 07:51 PM
  #16  
mrmtrtrnd's Avatar
mrmtrtrnd
Race Director
Supporting Lifetime
10 Year Member
 
Joined: Sep 2008
Posts: 10,777
Likes: 5
From: Wichita Ks
Default

No I'm having a completely different problem on my car. The engine runs good but intermittently dies. It's been a real pain to find the problem but I think I'm closing in on it.
Reply

Get notified of new replies

To Lights flickering problem , video inside





All times are GMT -4. The time now is 12:06 AM.

story-0
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-1
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-2
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-3
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-4
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-5
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-6
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-7
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-8
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-9
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