This is a discussion on Flickering headlights within the Corvette forums, part of the Vehicle Specific category; So lately my headlights have started to flicker, I'm guessing its the alternator, battery is new and connections seem tight. ...
12-02-2009, 10:34 AM #1
So lately my headlights have started to flicker, I'm guessing its the alternator, battery is new and connections seem tight. The battery gauge jumps around from pretty low to around 14, There's no aftermarket stereo or anything on this car so not sure what else could cause this. After doing a search it seemed real common on trans ams.. They talked about replacing the alternator with one off a truck, would that be possible on a corvette also? or should I go with a stock replacement? Oh and it has the HID headlights if that matters.
12-02-2009, 11:06 AM #2
I was just messing with it some more, when I turn the key on accesory without starting the car the headlights flicker like strobe lights, but when I start the car and let it idle in the garage they work just fine. I'm thinking once the fan turns on after driving a bit is when the headlights start to flicker because the alternator doesnt produces enough amps?
12-02-2009, 12:42 PM #3
- Join Date
- Jun 2008
- Annapolis, MD
BLK/BLK w/CGM Stripes
- 2010 Camaro 2SS/M6
it'll be hard to tell with the HID's installed man, it could even be the ballasts. Try swapping in some stock bulbs and see if it still does it.
12-02-2009, 09:52 PM #4
Im pretty sure these HIDs are the whole headlight assembly, not just bulbs, so would I be able to swap in stock bulbs to try that?
12-02-2009, 10:01 PM #5
IMHO prolly the Alt takin' a vacation soon...
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12-02-2009, 10:02 PM #6
Yea I was just thinking the headlight bulbs going out shouldn't affect the battery gauge, gotta be the alternator.
12-02-2009, 10:27 PM #7
Should I got with OEM replacement or is there something better I can upgrade to?
12-02-2009, 10:37 PM #8
I was still able to buy a stock "new" not rebuilt Alt for my 92 z34. So I'd imagine a brand new Alt for your ride is attainable too. I just don't trust rebuilds unless I rebuilt it lol.. Shop around, I found that over the years the better the warranty in most cases the better the build quality..
12-08-2009, 06:57 PM #9
- Join Date
- Aug 2005
- 2002 Z06
I agree on buying OEM although yours did not last as long as its should IMHO...
I use a local repair shop when I need to get a new one. Nothing beats taking your parts to a guy who will rebuild it on the bench in front of you!
12-08-2009, 09:20 PM #10
12-12-2009, 01:48 AM #11
Check your grounds on the lights and chassis ground. I notice that when my battery gets old it does the same thing on my Bird.
You rev up the motor and it gets brighter. After the battery gets a good deep charge that goes away. Also, when my battery is low or old the radio starts to act up.
When this starts happening I check the grounds, clean terminals and buy a new battery if it's been three years.
The last time I upgraded to a higher CCA battery than stock. That seems to help as well.
Good luck ...
Last edited by Mecinoid; 12-12-2009 at 01:52 AM.
12-12-2009, 02:20 AM #12
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