Brake lights not working

Tiny
SEMAJ BERRYMAN
  • MEMBER
  • 2005 CADILLAC CTS
  • 3.6L
  • V6
  • 2WD
  • AUTOMATIC
  • 169,000 MILES
My brake lights is not working what is the problem?
Wednesday, March 20th, 2019 AT 7:22 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,256 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.
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Thursday, March 21st, 2019 AT 12:00 PM

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