2005 Chevy Tahoe, Brake Lights Come On w/Headlights
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Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=131841
Printed Date: April 20, 2024 at 9:26 AM
Topic: 2005 Chevy Tahoe, Brake Lights Come On w/Headlights
Posted By: bigjontn
Subject: 2005 Chevy Tahoe, Brake Lights Come On w/Headlights
Date Posted: July 17, 2012 at 3:08 PM
My brake lights come on and stay on when the headlights are on. Was told that the bcm controls this. Dealer wants more money than I have to replace. A new one will have to be programmed by the dealer so I'm told. Does anyone have any information that might be helpful.
Thanks
BigJon
Replies:
Posted By: i am an idiot
Date Posted: July 17, 2012 at 3:30 PM
Do you have separate plugs for the brake and tail lamps? What are the chances somebody got them mixed up?
Posted By: bigjontn
Date Posted: July 17, 2012 at 4:11 PM
I wish it was that simple. During the day when I press the brakes my park lights come on/off with brake lights.
Posted By: i am an idiot
Date Posted: July 17, 2012 at 4:14 PM
Sounds like a bad ground on the brake lamp harness.
Posted By: bigjontn
Date Posted: July 17, 2012 at 4:33 PM
I'll try secondary ground for tail/brake lights
Posted By: howie ll
Date Posted: July 18, 2012 at 12:09 AM
X2 with Mr. I.
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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: oldspark
Date Posted: July 18, 2012 at 1:37 AM
x3 with Mr I.
Usually however a bad ground results in a dimmer light - ie, it is the tail-light filament that glows, not the brake (assuming brake-tail common grounding). [Traditionally, your front parkers should also glow when the brake (light) is applied.]
But if extra switching is used (relays or transistors etc), then full brightness is possible.
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