Brake lights not working

2005 CADILLAC CTS

169,000 MILES • 3.6L • V6 • 2WD • AUTOMATIC

SEMAJ BERRYMAN

MEMBER
2 POSTS
FOLLOW

My brake lights won't light up on my car, but the tail lights work. put a new brake light switch in and i changed the BAS fuse under the back seat and still no results.

Mar 11, 2019 at 3:01 AM

ASEMASTER6371

CERTIFIED EXPERT
52,796 POSTS

Good morning,

I attached a diagram for you to view. You need to check the voltage to the stop light switch. It uses a 5 volt reference voltage to send a signal to a module which controls the brake lights.

Roy

Images (Click to enlarge)

Mar 11, 2019 at 3:39 AM