Dash and Running Lights Blowing Fuses - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
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post #1 of 30 (permalink) Old 02-09-2012, 04:01 PM Thread Starter
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Dash and Running Lights Blowing Fuses

Heres the back story: 2008 Cobalt Sport. I had a burned out headlight. I figured if i was gonna replace a light i would replace the set with a brighter light. A day later my dashboard lights went out (and my running lights too but i didn't know that immediately). I spent a week replacing fuses until in desperation i dropped a 15 amp in instead of the 10. Bad idea. I smelled smoke coming from the trunk and pulled it right away. I was just about to concede defeat and take it to the dealer when i decided to try putting in standard lights. My problem was fixed...for a bit.

For a week i had no problems then monday the lights went out again. I replaced the fuse it blew within minutes. I could smell a bit of smoke coming from a plate in the trunk (rear interior of the trunk has a plastic plate that i cannot figure out how to remove). I'm fairly certain i smoked the wires for my running lights and that the bundle is behind that plate. Does anybody have any idea of how to remove it. I'm so frustrated i'm ready to just snap it.

Any help would be appreciated.
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post #2 of 30 (permalink) Old 02-09-2012, 04:06 PM
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What bulbs did you put in?
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post #3 of 30 (permalink) Old 02-09-2012, 04:16 PM Thread Starter
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At first i tried replacing the with:
Sylvania SilverStar TWIN Halogen Headlight
Part No 9007 ST/2

Then i made the unfortunate test with the 15 amp fuse.

Then i put in:
Sylvania Halogen Headlight
Part No 9007

Everytime i put a new fuse in it i smell a whiff of smoke in the trunk right as the fuse blows. So i have to get at the wire bundle that i suspect is behind that plate.
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post #4 of 30 (permalink) Old 02-09-2012, 04:28 PM
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I am fighting a headlight issue right now and Coby7 is a great help he should be along before too long with answer for you.
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post #5 of 30 (permalink) Old 02-09-2012, 05:05 PM Thread Starter
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I hope so. I'm pretty sure i know where the the problem lies and if i can get at it it might be only a matter of retaping the wires to prevent the short. But i need to get at them first to be sure.
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post #6 of 30 (permalink) Old 02-09-2012, 06:51 PM
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Hockey Game is over. Which fuse are you blowing? The DRL or low beam? Was the other one the cluster fuse(fuse #7). There is no relation between these two fuses burning at the same time. Wires are in different bundles and on a different fuse block. Now for that plastic cover you are talking about in the trunk. Do you mean the vent flap because there are no wires behind that plastic cover. The reason you are probably smelling it in the trunk is because all the air from the cabin exits via that vent trap. No wires in the trunk related to DRL or Cluster except B+ of course and if you look at the size of those wires you know they are not getting hot.
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Last edited by Coby7; 02-09-2012 at 07:21 PM.
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post #7 of 30 (permalink) Old 02-09-2012, 07:26 PM
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I have a whole thread on the problems I encountered when I up the power of my headlights to 100/80W.

https://www.yourcobalt.com/forums/pro...ng-lights.html

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post #8 of 30 (permalink) Old 02-10-2012, 05:19 AM Thread Starter
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I keep blowing the PRK LAMP fuse. (I did see the vent off to the passenger side and don't think it's coming from that). When i have someone replace the fuse almost immediately i get a whiff of smoke coming from the vicinity of the edges of the plastic plate.

Here's some pics:

Me standing outside the car looking into trunk at the top of the plate.



From inside the trunk. No wires coming out passenger side.



Drivers side and a likely culprit. This wire bundle fits the bill but i can't get at where it's smoking with the plastic plate in the way.

I think the cluster fried at some wrapped point behind that plate. I just need a way to get that plate off and would prefer not breaking it in the process.

Last edited by blpetts; 02-10-2012 at 05:26 AM.
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post #9 of 30 (permalink) Old 02-10-2012, 01:04 PM
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If you are talking about this black cover that surrounds the trunk latch it just pulls straight up and only held in place by four snaps to the compartment sheet metal. But there is nothing behind it.
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post #10 of 30 (permalink) Old 02-10-2012, 02:28 PM Thread Starter
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You are correct Coby. That's what i wanted to know and that wire i thought likely only wrapped from the battery and was incidentally underneath the plastic. Back to square one.

After the dash lights go out there's a good 20-30 secs before i smell it in the cab. So i still think the wires causing me trouble are in the trunk. Any thoughts on that?
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