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Headlights dim semi randomly

V

Val

Guest
I have noticed that while cruizing down the interstate my headlights (lowbeam) will dim for about 1 second sometimes random, but very often the instant I touch the brake they dim for a second.

I have not had any problems with the charging system, so this rather perplexing. Anyone have ideas?
 

Pinky

Well-known member
Joined
Jul 20, 2006
Messages
252
Location
Northern VA
Corvette
1998 Torch Red Convertible
I have noticed that while cruizing down the interstate my headlights (lowbeam) will dim for about 1 second sometimes random, but very often the instant I touch the brake they dim for a second.

I have not had any problems with the charging system, so this rather perplexing. Anyone have ideas?

Me too! No ideas, but I recall reading a thread or two where this seems to be a rather common occurance.

Just close your eyes and you'll never notice. ;LOL
 
V

Val

Guest
The battery is the original. But it shows no signs of leaks nor do I have any other electrical problems.


Its bad enough that I bet people think I'm flashing my lights at them. It just a slight annoyance, no bog in the engine or any other problems just a 1 second dim in the headlights.
 
Joined
May 10, 2002
Messages
2,255
Location
Boise, Idaho
Corvette
2002 electron blue Z06
I am surprised it has lasted this long. I had to replace mine about a year ago. Some quirky problems went away after that. The battery did not slowly fail, with sluggish starts, etc. It just refused to turn the engine over one day. The battery may not be your problem; I could be way off base here. But I have seen battery issues reported quite frequently with C5's, and you battery is getting old.
 

jwawhite

Well-known member
Joined
Jun 23, 2004
Messages
155
Location
oxnard
Corvette
2003 Anny Coupe
Dim in Lights

Did a search and came up with this topic. Mine has started doing this on low beam with no apparent connection to anything, just dims and then normal.
Have 17k on car, has original battery, the volt meter in DIC seems normal also.
 

gmjunkie

Well-known member
Joined
Nov 11, 2004
Messages
4,520
Location
Old Fort NC/Vero Beach FL
Corvette
03 Z-51,78 L82 Coupe
I am surprised it has lasted this long. I had to replace mine about a year ago. Some quirky problems went away after that. The battery did not slowly fail, with sluggish starts, etc. It just refused to turn the engine over one day. The battery may not be your problem; I could be way off base here. But I have seen battery issues reported quite frequently with C5's, and you battery is getting old.
Be my guess that DRTH VTR is right on Track here!!!! Mine had been doing this for about a Year!!!! Then last week the DIC said "SERVICE COLUMN LOCK" and the Lock would no longer work,when I checked the voltage before cranking I had 10.93 volts!! New Battery, PROBLEM SOLVED!!!!:upthumbs
 

Gorgon

Well-known member
Joined
Jul 15, 2002
Messages
1,040
Location
Philadelphia, PA
Corvette
None
Mine does this on occasion as well but my battery is new within the last couple years. I would think this would be more grounding point related than battery?

Leon
 

leadfoot4

Well-known member
Joined
Oct 13, 2006
Messages
45
Location
Webster, NY
Corvette
2001 black coupe
From what I've heard, they all do this, as the alternator "cycles". When it's dark out, and I leave my house for work with the headlights on, I can predict within 2-3 houses, where I'll be on the street, when it happens.
 

Vetteforfun

Well-known member
Joined
Mar 21, 2006
Messages
48
Location
Belmont, NC
Corvette
1999 Magnetic Red Coupe, 6 speed, Z06 Ti Exhaust
This head light dimming happens to me too. At first I thought if was just me because the lights would dim and then come back in a blink of the eye. I think the car has it's original battery and I was assuming this was the problem. Just this week, my HUD brightness goes from full to about half and I can't get it back until I shut the car off and restart. But then then the display dims again within a minute or two. Could this be battery related? Or am I looking at some other problem here? :eek:hnoes
 

TopDownCruzin03

Active member
Joined
Sep 19, 2006
Messages
36
Location
Houston, Tx
Corvette
2003 6sp conv.
I've taken my C5 to the dealership for this very problem. The dealership said, without any real explanation, that this was "normal". I have 22,000 miles on the C5 and so far no problems.
 

jwawhite

Well-known member
Joined
Jun 23, 2004
Messages
155
Location
oxnard
Corvette
2003 Anny Coupe
Reminds me of...

the Great BMW 259 4 stoke two cylinder air/oil cooled motor.

"They all do that, it's normal" Said the repair dept Manager. What the problem was the motor was so lean it couldn't hold a steady slow speed idle. I installed a device that delivered more fuel at slow speeds (Techlusion) and that took care of the problem.

So, have you ever had a normal functioning car give you this blinking problem? I tell you, there's something not right in Corvette ville. Why didn't the car do this when it was newer? What could be the problem?
 

Pinky

Well-known member
Joined
Jul 20, 2006
Messages
252
Location
Northern VA
Corvette
1998 Torch Red Convertible
So, have you ever had a normal functioning car give you this blinking problem? I tell you, there's something not right in Corvette ville. Why didn't the car do this when it was newer? What could be the problem?

My car functions normally otherwise. The headlights very briefly dim when braking. I bought the car used with 25,000 miles on it so I don't know if the battery is the original but I have never had ANY electrical problems.
 

Paul Douglas

Active member
Joined
May 5, 2005
Messages
27
Location
Tyler, TX
Corvette
2002 Quicksilver Coupe
Lights dimming

My 2002 Coupe has been doing the same thing for the past year. Never lasts more than a second or two. Just had my car in to the dealer this week for warranty work on the HVAC display which was inoperative, and asked them to check for the dimming problem. According to them, it was a common occurence, with no fix for it. Seems to me, when there is something like this that affects so many cars, something is wrong.

Paul
 

c5y2k

Well-known member
Joined
Oct 1, 2005
Messages
475
Location
Gallatin, TN
Corvette
2000 Nassau Blue Vert
I notice my lights dim only when I roll the windows up or down and sometimes when the turn signals blink but you really have to be looking for it.

I fixed it by not driving the car at night. :boogie Less bug guts to clean too!

I do think its about time to replace the battery (7 years)

What spects should one look for in a replacement battery besides optima red or yellow tops?
 

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