Brake lights will not work

1999 HYUNDAI ACCENT
357,000 MILES • 1.5L • 4 CYL • 2WD • MANUAL
Avatar
MICHAELRAYGULLETT
  • MEMBER
  • 2 POSTS
Replaced switch fuses okay, no brake lights. taillights and turn signals work not brake lights.
Jun 2, 2019 at 4:13 PM
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.
Advertisement
Avatar
JACOBANDNICKOLAS
  • CAR REPAIR CONTRIBUTOR
  • 110,190 POSTS
Welcome to 2CarPros.

First, check fuse 4 in the interior fuse box.

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

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

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

https://www.2carpros.com/articles/how-to-use-a-voltmeter

https://www.2carpros.com/articles/how-to-check-wiring

_______________________________________

If the fuse is good, you next need to check power in and out of the brake light switch.

If there is, using a test light, check for power to the light socket. If there is power with the test light, then the ground is bad. If there is no power, then you need to trace the wiring back. There are a couple splices to check. I attached some pictures for you to see the schematic. I circled all things to check.


Let me know if this helps.

Joe


Jun 2, 2019 at 7:44 PM
Advertisement
Avatar
MICHAELRAYGULLETT
  • MEMBER
  • 2 POSTS
No power to switch but power at relay. all rest lights work.
Jun 2, 2019 at 8:34 PM
Avatar
JACOBANDNICKOLAS
  • CAR REPAIR CONTRIBUTOR
  • 110,190 POSTS
Welcome back:

I'm not sure what relay you are referring to. The fuse I suggested checking is hot all the time. That sends power directly to the brake light switch. If there is no power at the switch, either the fuse is bad, one of the splices in the wiring is bad, or the wire itself is broken at some point. Were you able to check that fuse? Take a look at the first picture I attached. It shows the fuse I'm questioning. Check that and let me know. If it is good, confirm power is available on both sides of the fuse. Basically, make sure power is going through the fuse and out.

Let me know.

Take care,
Joe
Jun 3, 2019 at 7:30 PM