brake lights not working

2005 CADILLAC CTS
169,000 MILES • 3.6L • V6 • 2WD • AUTOMATIC
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SEMAJ BERRYMAN
  • MEMBER
  • 2 POSTS
My brake lights is not working what is the problem?
Mar 20, 2019 at 7:22 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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STRAILER
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 54,178 POSTS
Hello,

It sounds like the BAS relay has stopped working o you have a fuse out. here are two guides to help test the relay and fuses with the brake light diagrams below so you can see how the system works and the fuse and relay locations as well:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

and

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.
Mar 21, 2019 at 12:00 PM
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