# Yukon 04 - Brake lights not working

**URL:** <https://community.cartalk.com/t/yukon-04-brake-lights-not-working/25239>\
**Category:** Maintenance/Repairs\
**Created:** [January 20, 2009, 3:36pm UTC](https://community.cartalk.com/t/yukon-04-brake-lights-not-working/25239 "2009-01-20T15:36:58Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![kbshana](https://avatars.discourse-cdn.com/v4/letter/k/df788c/32.png) [@kbshana](https://community.cartalk.com/u/kbshana)\
**Post date:** [January 20, 2009, 3:36pm UTC](https://community.cartalk.com/t/yukon-04-brake-lights-not-working/25239/1 "2009-01-20T15:36:58Z")

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My brake lights do not work when my lights are on - the brakes look like they are on. Then when I use my right blinker almost all of the back lights flash - even the light by the license plate.  
  
 Please help with any suggestions.

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**Author:** ![useless123](https://avatars.discourse-cdn.com/v4/letter/u/848f3c/32.png) [@useless123](https://community.cartalk.com/u/useless123)\
**Post date:** [January 20, 2009, 4:51pm UTC](https://community.cartalk.com/t/yukon-04-brake-lights-not-working/25239/2 "2009-01-20T16:51:54Z")

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Short in wiring?

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**Author:** ![researcher](https://avatars.discourse-cdn.com/v4/letter/r/edb3f5/32.png) [@researcher](https://community.cartalk.com/u/researcher)\
**Post date:** [January 20, 2009, 6:58pm UTC](https://community.cartalk.com/t/yukon-04-brake-lights-not-working/25239/3 "2009-01-20T18:58:56Z")

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Bad ground for the electrical harness going to the rear light clusters.

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**Author:** ![MikeInNH](https://avatars.discourse-cdn.com/v4/letter/m/a587f6/32.png) [@MikeInNH](https://community.cartalk.com/u/MikeInNH)\
**Post date:** [January 20, 2009, 8:19pm UTC](https://community.cartalk.com/t/yukon-04-brake-lights-not-working/25239/4 "2009-01-20T20:19:32Z")

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Short or a bad ground.

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**Author:** ![Cougar](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/cougar/32/21348_2.png) [@Cougar](https://community.cartalk.com/u/Cougar)\
**Post date:** [January 20, 2009, 10:38pm UTC](https://community.cartalk.com/t/yukon-04-brake-lights-not-working/25239/5 "2009-01-20T22:38:48Z")

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If you have a trailer harness check that out for a problem. It sounds like the brake circuit is backfeeding to the other lights.