brake lights not working?

2003 BUICK CENTURY
200,000 MILES • 3.1L • V6 • 2WD • AUTOMATIC
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DARRELL SIEGRIST
  • MEMBER
  • 1 POST
Replaced bulbs, markers work fine. even switched the left side pigtail with the right side still no brake light?
Jan 24, 2021 at 2:07 PM
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KASEKENNY
  • ✓ASE Certified Mechanic
  • 18,907 POSTS
  • ASE Certified Mechanic
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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May 10, 2021 at 6:26 PM
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