Brake lights not working?

Tiny
DARRELL SIEGRIST
  • MEMBER
  • 2003 BUICK CENTURY
  • 3.1L
  • V6
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
Replaced bulbs, markers work fine. Even switched the left side pigtail with the right side still no brake light?
Sunday, January 24th, 2021 AT 2:07 PM

1 Reply

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
More than likely we have a ground issue if this is the only light that is not working.

We need to check to see if there is voltage on the ground side of the bulb.

Here is a guide that will help with this testing:

https://www.2carpros.com/articles/how-to-check-wiring

and

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

Below is a copy of the wiring diagram that will help with this. Please let us know what you find. Thanks
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Monday, May 10th, 2021 AT 6:26 PM

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