Brake lights not working

2012 HONDA CIVIC
210,000 MILES • AUTOMATIC
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CELLOMASTA
  • MEMBER
  • 1 POST
All 3 brake lights are not working. I've tested the fuse, the brake light switch, and power is getting to the brake light switch. Looking for a wiring diagram I can use to trace the power/ground to the lights at the back of the car to see if the lightbulbs are getting power
Oct 16, 2026 at 11:20 AM
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CARADIODOC
  • ✓Experienced Mechanic
  • 34,413 POSTS
This is a pretty straightforward circuit. It can be hard to read, so I expanded part of it for you.

The third drawing is the best I could find to show the location of the under-dash fuse and relay box. Let me know if you need to remove it. There's about six pages of instructions on how to do that.
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Oct 16, 2026 at 5:17 PM
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