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Brake Light Not Working

Tiny
LTAHOE7195
  • MEMBER
  • 2003 GMC ENVOY
Tail lights work on both sides, but the brake light only comes on for the left side and high middle also works, but the right side brake light does not. Would this be considered a brake light switch issue if one of the 2 sides is not working?
Thursday, February 11th, 2010 AT 11:31 AM

2 Replies

Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
Hello,

THis sounds like you have a bad connection at the right side light. Here is the brake light wiring diagrams where you can see the two lower lights are connected so if one works the other should as well. Check for power coming to the right socket light/blue wire. Here is a guide to help you.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

and

https://www.2carpros.com/articles/brake-lights-not-working

Check out the diagrams (Below). Please let us know what you find. We are interested to see what it is. Cheers, Ken
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Tuesday, April 13th, 2021 AT 8:12 PM
Tiny
EJSTADLER
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Thanks for this post I had a bad light socket they I replaced cost me $34.00 all set! I Love this site.
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Tuesday, April 13th, 2021 AT 8:12 PM

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