what is causing
Burning Brakes
Joined: Sep 2007
Posts: 860
Likes: 3
You most likely have a hole in the top of your housing. Many GM vehicles (including our C5s) use the turn signal assembly for DRLs, and the DRLs can melt holes in the top of the housing, which lets water in. You will need to either find and patch the hole or replace the housing. After doing that I would recommend also checking the socket itself for any corrosion.
Burning Brakes
Joined: Sep 2007
Posts: 832
Likes: 0
From: PSL FL
Do what I did and take out the DL fuse. They blinkers still work but I don't have to replace the bulbs every other week. Now I am up to 6-8 weeks before having to change them.
This is definitely one of GM's poorer designs.
This is definitely one of GM's poorer designs.
Safety Car
Joined: Apr 2007
Posts: 3,640
Likes: 83
From: . New York
You most likely have a hole in the top of your housing. Many GM vehicles (including our C5s) use the turn signal assembly for DRLs, and the DRLs can melt holes in the top of the housing, which lets water in. You will need to either find and patch the hole or replace the housing. After doing that I would recommend also checking the socket itself for any corrosion.
right on the money 
This is what it will look like
[IMG]
[/IMG]The thread on putting in my clear lenses (there are way better threads than this, just search)
http://forums.corvetteforum.com/c5-g...ng-lights.html
If you are replacing them, might want to consider LED's and the clear lenses. Look/work great.
Last edited by Jistari; Jan 23, 2009 at 11:06 AM.
Safety Car
Joined: Nov 2002
Posts: 4,025
Likes: 2
From: Valdosta GA
Make sure you are using a 4157 bulb. I tried to use a 4057 (looks and fits the same) "chrome dipped" bulb but they lasted only a week or two at most before blowing. The 4057 bulb can not take the constant use for a Daytime Running Light application while the 4157 is designed specifically for that.
As the other folks have mentioned, the other common problem is moisture in the housing.
As the other folks have mentioned, the other common problem is moisture in the housing.
Race Director
Joined: Apr 2005
Posts: 11,138
Likes: 11
From: Fremont CA
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-'19-'20
NCM Sinkhole Donor
You most likely have a hole in the top of your housing. Many GM vehicles (including our C5s) use the turn signal assembly for DRLs, and the DRLs can melt holes in the top of the housing, which lets water in. You will need to either find and patch the hole or replace the housing. After doing that I would recommend also checking the socket itself for any corrosion.
That's the typical cause. You can seal it with "Ultra Copper" available at any big chain automotive store. It's a copper / silicone blend. The silicone seals it nicely and handles heat well. The copper will disipate the heat faster to keep the temperature from rising too high. You will also probably find that the socket for the lamp is coroded since it sounds like you have been having this problem for a while. Good luck 
Team Owner
Joined: Jul 2004
Posts: 38,655
Likes: 25
From: Bunnell FL
I just posted the thread below. Both of my housings has small "X" cracks just above the bulb. That is how the water got in. I also had to replace the socket on the right front.
http://forums.corvetteforum.com/c5-g...rning-out.html
http://forums.corvetteforum.com/c5-g...rning-out.html
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Racer
Joined: May 2007
Posts: 435
Likes: 1
From: Newcastle, UK
That's the typical cause. You can seal it with "Ultra Copper" available at any big chain automotive store. It's a copper / silicone blend. The silicone seals it nicely and handles heat well. The copper will disipate the heat faster to keep the temperature from rising too high. You will also probably find that the socket for the lamp is coroded since it sounds like you have been having this problem for a while. Good luck
Administrator
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From: In a parallel universe. Currently own 2014 Stingray Coupe.
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You most likely have a hole in the top of your housing. Many GM vehicles (including our C5s) use the turn signal assembly for DRLs, and the DRLs can melt holes in the top of the housing, which lets water in. You will need to either find and patch the hole or replace the housing. After doing that I would recommend also checking the socket itself for any corrosion.
My '99 had that problem and the dealer ended up sealing the lens housing with some silicone and it stopped the bulbs burning out.
Race Director
Joined: Apr 2005
Posts: 11,138
Likes: 11
From: Fremont CA
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-'19-'20
NCM Sinkhole Donor
I guess I should have specified that.