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post #1 of 11 (permalink) Old 12-11-2012, 07:25 PM Thread Starter
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Question Brake Light Problems

please help me. my brake lights come on when i turn on the headlights and go off when i put on the brakes the lights dim to driving lights. I changed the brake light switch but it never fixed the problem. Car is 09 cobalt LT.
Thanks
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post #2 of 11 (permalink) Old 12-11-2012, 07:56 PM
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Did you change the bulbs lately.

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post #3 of 11 (permalink) Old 12-11-2012, 09:44 PM Thread Starter
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yea I changed them. the brake lights work normally when the headlights are off
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post #4 of 11 (permalink) Old 12-12-2012, 05:22 AM
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You must have put in wrong ones.3157?

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Last edited by Coby7; 12-12-2012 at 05:25 AM.
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post #5 of 11 (permalink) Old 12-12-2012, 06:27 AM
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Fuses? almost seemed like the same problem i had with my taillights. I'm assuming your speedo cluster is on though so it might not be a fuse

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post #6 of 11 (permalink) Old 12-12-2012, 06:49 AM
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Welcome to the forum board4life,

I don't have technical information, but if you were to have any questions about warranty or recall information on your specific vehicle, or if you were going to be working with a dealership and wanted for me to help in any way, let me know! I would need the last 8 digits of your VIN, name, and contact information with your inquiry.

Sarah, GM Customer Service

Have you checked into Chevrolet Owner Center? You can maintain service history, check on warranty or recall information, and more. Visit my.chevrolet.com!
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post #7 of 11 (permalink) Old 12-12-2012, 05:36 PM Thread Starter
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im not to sure of the bulb # i put in, i went to autoparts store and brought in the bulb that was in car and jus got the same one. does it have the # on it so i could check?
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post #8 of 11 (permalink) Old 12-12-2012, 06:00 PM
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It almost sounds like you put them in backwards.
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post #9 of 11 (permalink) Old 12-12-2012, 06:17 PM Thread Starter
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doesnt the plug only go on one way? i had this same problem with the old taillights also.
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post #10 of 11 (permalink) Old 12-12-2012, 07:55 PM
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3157 is the right one, and 3156 won't work right. They also go in both way I don't think you can put them in the wrong way

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