Go Back   Corvette Forum > C4 Corvettes, 1984 - 1996 > C4 Tech/Performance
Sign in using an external account
Register Forgot Password?
Register Search Today's Posts Mark Forums Read FAQ Vendor Directory
Search
C4 Tech/Performance
L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine Sponsored by
J&D Corvette

Welcome to Corvetteforum.com!
Welcome to Corvetteforum.com.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join Corvetteforum.com today!


Corvette Store
 
 
C7 Parts & Accessories
C6 Parts & Accessories
C5 Parts & Accessories
C4 Parts & Accessories
C3 Parts & Accessories
C2 Parts & Accessories
C1 Parts & Accessories
Wheels & Tires
Sponsored Ads
 
 
Vendor Directory
  
Reply
 
 
 
 
Thread Tools Search this Thread
Old 05-22-2006, 09:43 PM   #1
rmendoza
CF Senior Member
 
rmendoza's Avatar
 
Member Since: May 2006
Location: Colorado Springs Colorado
Send a message via Yahoo to rmendoza Send a message via Skype™ to rmendoza
Default Flickering in lights

Just returned from Kuwait supporting our troops. Bought a '90 Corvette convertible on ebay. Seems to be in pretty good shape with a few things that I will need to fix.

This is an electrical problem I guess. When idling with no lights on, the speedometer background flickers as does the radio and electronic heating and air conditioner indicators and the voltmeter.

The flicker can also be seen at idle in the headlights. Of course when driving or reving higher than idle flicker can't be seen.

Also when turning the engine off, the speedometer background light remains lit for about 2 seconds, is this normal?

Any help would be appreciated.
thx
rick
rmendoza is offline   Reply With Quote
Old 05-23-2006, 12:05 AM   #2
trulytex
CF Senior Member
 
trulytex's Avatar
 
Member Since: Apr 2006
Location: Okeechobee FL
bggoodbread
Default

Let me start out by saying God Bless you & commend you for your service to our country. Thanks You. And congrats on you Corvette adoption! I purchased my first Corvette 2 months ago, a 1990 convertible and I love it. My speedo background lights also pulse as you have described. I don't know if it is normal, but it's not uncommon. I don't recall if my speedo background light stays lit after shut-down, but I don't think it does. The guys & ladies on this forum can definitely help with your problems with a smattering of well intentioned constructive criticisms.
trulytex is offline   Reply With Quote
Old 05-23-2006, 12:31 AM   #3
jfb
CF Senior Member
 
Member Since: Mar 2001
Location: Cincinnati, Oh USA
Default

With engine idling, lights flickering, unplug the connector on the alternator. If the flickering stops, you have an oscillating voltage regulator in the alternator. An auto electrical shop can replace the voltage regulator, or you can do it yourself, or you can replace the alternator. If you have an alternator with a lifetime guarantee, just replace it.
jfb is offline   Reply With Quote
Old 05-23-2006, 12:31 AM   #4
C4DC
CF Senior Member
St. Jude Donor '06
 
C4DC's Avatar
 
Member Since: Aug 2002
Location: Clearwater FL
Default

I know that many do it, my 96 included. Thank you for your service to our country!
C4DC is offline   Reply With Quote
Old 05-23-2006, 07:37 AM   #5
runner140*
CF Senior Member
Support Corvetteforum!
 
runner140*'s Avatar
 
Member Since: Mar 2004
Location: Ft. Lauderdale Fl
Default

Start checking your grounds starting with the main ground around your battery and work out from there. Sounds like a bad ground problem to me.
runner140* is offline   Reply With Quote
Old 05-23-2006, 08:03 AM   #6
RRT vette
CF Senior Member
 
RRT vette's Avatar
 
Member Since: Feb 2006
Location: Louisiana
Default

Quote:
Originally Posted by jfb
With engine idling, lights flickering, unplug the connector on the alternator. If the flickering stops, you have an oscillating voltage regulator in the alternator. An auto electrical shop can replace the voltage regulator, or you can do it yourself, or you can replace the alternator. If you have an alternator with a lifetime guarantee, just replace it.
with jfb.
RRT vette is offline   Reply With Quote
Old 05-23-2006, 03:14 PM   #7
Fuzzy Dice
CF Senior Member
Cruise-In IV Veteran
 
Fuzzy Dice's Avatar
 
Member Since: Oct 2001
Location: Deltona Florida
Default

The dash lights on my 93 began flickering and I started calling my car "disco vette"...lol...turns out it was the voltage regulator so I took this opportunity to upgrade to a 140 amp alternator...
Fuzzy Dice is offline   Reply With Quote
Old 05-31-2006, 03:04 PM   #8
rmendoza
CF Senior Member
 
rmendoza's Avatar
 
Member Since: May 2006
Location: Colorado Springs Colorado
Send a message via Yahoo to rmendoza Send a message via Skype™ to rmendoza
Default

On the Flickering lights, the following suggestions are what I got:
"With engine idling, lights flickering, unplug the connector on the alternator. If the flickering stops, you have an oscillating voltage regulator in the alternator. An auto electrical shop can replace the voltage regulator, or you can do it yourself, or you can replace the alternator. If you have an alternator with a lifetime guarantee, just replace it."

Finally, how did you load the image that is under your user name? I want to load a picture of my '90 corvette there but can't find out where you do that.

Thanks again
rick mendoza

I got this reply from several owners with varying years of corvettes, so it must be a pretty common problem. Thought I'd share that with you for your future reference.

Thanks for the comment on my service. I actually retired after 37 yrs of Government Civil Service, having worked on A/C, ICBMs, NASA and DOD Spaced Systems. For six month after retirement I enjoyed the '86 Corvette that I had at the time and took many road trips. Finally board and with things getting hot in the middle east, I wanted to contribute so I took a job in Kuwait May of "03. We provided all the support to the Army going in and out of Iraq. I shared 3 Thanksgivings and 2 Christmas Day meals with the greatest resource this country has. Eventhough, I missed my family, it was truly the most rewarding time of my life.
rmendoza is offline   Reply With Quote
Old 05-31-2006, 03:07 PM   #9
rmendoza
CF Senior Member
 
rmendoza's Avatar
 
Member Since: May 2006
Location: Colorado Springs Colorado
Send a message via Yahoo to rmendoza Send a message via Skype™ to rmendoza
Default

Thank you Sir! It doesn't seem to be a problem but is a little irratating. Of course it has a purpose so I need to get it fixed.

thx again
rick mendoza
rmendoza is offline   Reply With Quote
Old 05-31-2006, 03:11 PM   #10
rmendoza
CF Senior Member
 
rmendoza's Avatar
 
Member Since: May 2006
Location: Colorado Springs Colorado
Send a message via Yahoo to rmendoza Send a message via Skype™ to rmendoza
Default

On the Flickering lights, the following suggestions are what I got:
"With engine idling, lights flickering, unplug the connector on the alternator. If the flickering stops, you have an oscillating voltage regulator in the alternator. An auto electrical shop can replace the voltage regulator, or you can do it yourself, or you can replace the alternator. If you have an alternator with a lifetime guarantee, just replace it."

Thanks for your response, thought I'd share with you.

thx
rick mendoza
rmendoza is offline   Reply With Quote
Old 05-31-2006, 03:14 PM   #11
rmendoza
CF Senior Member
 
rmendoza's Avatar
 
Member Since: May 2006
Location: Colorado Springs Colorado
Send a message via Yahoo to rmendoza Send a message via Skype™ to rmendoza
Default

On the Flickering lights, the following suggestions are what I got:
"With engine idling, lights flickering, unplug the connector on the alternator. If the flickering stops, you have an oscillating voltage regulator in the alternator. An auto electrical shop can replace the voltage regulator, or you can do it yourself, or you can replace the alternator. If you have an alternator with a lifetime guarantee, just replace it."

Thanks for your response, I'll also check the ground.

thx
rick mendoza
rmendoza is offline   Reply With Quote
Old 05-31-2006, 03:18 PM   #12
rmendoza
CF Senior Member
 
rmendoza's Avatar
 
Member Since: May 2006
Location: Colorado Springs Colorado
Send a message via Yahoo to rmendoza Send a message via Skype™ to rmendoza
Default

Thanks for your response. Based an the responses from a number of owners of various year corvettes, seems to be a common occurrence. One even used the opportunity to upgrade to a 140 amp alternator, is that correct and what is your opinion on that?

thx again
rick mendoza
rmendoza is offline   Reply With Quote
Old 05-31-2006, 03:21 PM   #13
rmendoza
CF Senior Member
 
rmendoza's Avatar
 
Member Since: May 2006
Location: Colorado Springs Colorado
Send a message via Yahoo to rmendoza Send a message via Skype™ to rmendoza
Default

Thanks, based on responses I've received, that seems to be a common occurence.

So is the upgrade to a 140 amp alternator working out? and do you recommend it?

thx again
rick mendoza
rmendoza is offline   Reply With Quote
Old 05-31-2006, 10:12 PM   #14
patsfan
CF Senior Member
 
patsfan's Avatar
 
Member Since: Jun 2005
Location: Swanton VT 2000 Navy Blue Mettalic M6 / 1991 Auto - Steel Blue 68,500 R.I.P
Send a message via Yahoo to patsfan
Default

Thanks for your service to this great country we live in

I've noticed it with my 1991 and it has bothered / annoyed me . I haven't been able to trouble shoot it / research it yet do to more important /drivability issues holding priority over it .
please post when you found out what it was that was causing it

patsFan
patsfan is offline   Reply With Quote
Old 05-31-2006, 10:35 PM   #15
Sam Lam
CF Senior Member
 
Sam Lam's Avatar
 
Member Since: Apr 2002
Location: St. Charles, MO Route 66 Corvette Club
Default

Rick: My 89 had a problem with the instrument lights going dim and then they would go bright. My problem was a corroded (dirty) main bulkhead connector. This main connector is located just behind the battery and can easily be cleaned. I would recommend doing this work before you spend any of that hard earned $$$ protecting our country. If you need more info on this, send me an email to samlam@charter.net.
Sam Lam is offline   Reply With Quote
Old 05-31-2006, 10:35 PM
 
Go Back   Corvette Forum > C4 Corvettes, 1984 - 1996 > C4 Tech/Performance
Reload this Page Flickering in lights
 
 
 
Reply

Tags
1987, 1990, allante, c4, cadillac, corvette, dash, flicker, flickering, light, lights


Thread Tools Search this Thread
Search this Thread:

Click for Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
lights flickering?? glasguydj C5 Tech 4 12-31-2012 02:03 PM
Lights flicker Kwagnerhvac C6 Tech/Performance 6 09-11-2009 08:15 PM
Interior lights and parking lights flickering - help c54u C6 Corvette General Discussion 3 11-12-2008 08:24 PM
lights flicker at idle road dog C5 Tech 1 02-12-2008 09:05 PM
Lights flickering at idle...Please help! 2blklt4 C5 Tech 9 09-10-2007 10:29 PM


All times are GMT -4. The time now is 10:54 AM.


Emails & Password Backup