Headlights Flicker
Thread Starter
Burning Brakes
Joined: Mar 2005
Posts: 1,227
Likes: 15
St. Jude Donor '06
Headlights Flicker
Just a quick question about the headlights. Last night I noticed that they would periodically flicker, not just dim, but turn on and off quickly, is this due to a bad ground or connections? Both headlights seemed to do it at the same time, meaning they both flickered together. Furthermore, I could not duplicate the flickering by going over bumps or making sharp movements. It seemed totally random. Whats the possible causes? If its a bad ground, where is the ground located so I can clean it up and tighten it? If you guys need more info, let me know as i am pretty much logged in all the time!
Team Owner
Joined: Dec 2003
Posts: 21,835
Likes: 140
From: When all is said and done... there is a hell of a lot more said than done. Riverside,Texas
St. Jude Donor '05 thru '26
Search for threads by Bill Curlee, he's the EE man. Good pics and the locations of all grounds.
Drifting
Joined: Nov 2003
Posts: 1,893
Likes: 4
From: Sahuarita AZ
Mine dim when rolling upt he windows (when the windows get to the top and are fully closed). I assume this is just due to current draw from the window motors on the batter/alternator. I don't think the lights should flicker. You might check the forward most ground points on your car. I'm sure you can find a diagram on the forum (I would scan it and post it if I had the manual with me).
Thread Starter
Burning Brakes
Joined: Mar 2005
Posts: 1,227
Likes: 15
St. Jude Donor '06
Thanks for the replies. Yea, mine dim when the windows are moving and if you can actually watch the voltage drop on the DIC while your rolling up your windows...but like i said mine actually flicker on and off super quick. I sent Bill Curlee a PM to see if he can give some helpful points. I have the service manuals but have never used them...i think i will check there too!
Thanks guys!!
Thanks guys!!
Race Director
Joined: Feb 2004
Posts: 11,651
Likes: 9
From: HOW FAST WAS I GOING OFFICER? Los Angeles Hating GM Dealership Service Dept.'s Since Sept. 2004
St. Jude Donor '04-'05-'06-'07
Originally Posted by ben dover
Search for threads by Bill Curlee, he's the EE man. Good pics and the locations of all grounds.
But since he's not here yet, I'll try and help...
But I think you shouldl just check your physical connections as well (fuses and relays)
Good luck... keep us posted
Dave Q.
Thread Starter
Burning Brakes
Joined: Mar 2005
Posts: 1,227
Likes: 15
St. Jude Donor '06
Thanks DQ. Ill be checking those connections this weekend and make sure everything is good to go and tighten anything thats loose...i figure its prolly a bad ground...grounds are weird like that!
Supporting Vendor
Joined: Jun 2005
Posts: 23,323
Likes: 376
From: Marietta Georgia
St. Jude Donor '06-'07, '13, '15
Let us know.....mine do the same thing.
Thanks,
Jim
Thanks,
Jim
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Le Mans Master
Joined: Jul 2004
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From: Twilight zone
St. Jude Donor '05-'06
Originally Posted by Oldvetter
Mine used to do this, one of the battery terminals was loose. Tightened it, no more problems.
It was all my lights,tailights.interior..the works,they were just not as obvious as the headlights
After more in-depth investigating,I found that my new exide-orbital battery's terminal were tapped just slightly shorter than the original.This rendered terminal bolts slightly too long, therefore would not cinch up well,even though terminals were tight as h$%&!!
Test it by grabbing the terminal when tightened,and see if you can rotate it with relative ease.If you can, you may have the same problem I did.
The fix for me was to add a copper washer to each terminal( I tucked it under the plastic insulator part so it wasn't falling out everytime I removed a cable)
Now when tight, it is "tight". No more problem!
Not sure if this is your problem,but if it helps ANYONE,it is positive
It is, most likely ,a connection/ground somewhere though
Thread Starter
Burning Brakes
Joined: Mar 2005
Posts: 1,227
Likes: 15
St. Jude Donor '06
Thanks everyone for your help! I checked the negative battery cable and terminal. Sure enough the screw/post was loose so I threw a wrench on 'er and tightened it...NO flickering ever since! Beautful!
