Brake lights will not come on

2004 CHEVROLET SILVERADO
200,000 MILES • 5.3L • V8
Avatar
LOZANO77
  • MEMBER
  • 4 POSTS
So I checked fuses and replaced brake switch, tried the relay but the lights just won’t come on at all. no taillight, brake or cargo light brake. I’m confused first time owning a Chevrolet.
Sep 13, 2020 at 7:45 AM
Advertisement
Avatar
JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,240 POSTS
Hi,

First, make sure the fuse is good. Not only the fuse, but make sure there is power to it and from it.

If the fuse is good with power, I need you to check the orange wire at the switch to see if there is power. If there is, close the switch (brake depressed) and see if there is power out from the switch to the white wire from the switch.

Again, confirm there is power to the fuse and out from the fuse. Here is a link you may find helpful. Also, I attached a pic below you may find helpful.

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

Let me know what you find or if you have other questions.

Take care,
Joe
Image (Click to enlarge)
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Sep 13, 2020 at 10:45 AM
Avatar
LOZANO77
  • MEMBER
  • 4 POSTS
So checked all fuses and wires you told me to and receiving power to all of them.
Sep 15, 2020 at 9:04 AM
Avatar
LOZANO77
  • MEMBER
  • 4 POSTS
White wire is not receiving power.
Sep 15, 2020 at 9:05 AM
Avatar
JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,240 POSTS
Is there power at the orange wire to the switch?

Joe
Sep 15, 2020 at 12:13 PM
Avatar
LOZANO77
  • MEMBER
  • 4 POSTS
Well, dang it. I found the problem! And it was the darn brake switch harness was not plugged into the plug behind the dashboard never in my life have i felt so stupid.
Sep 15, 2020 at 2:37 PM
Avatar
JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,240 POSTS
LOL Don't feel stupid. Things like this happen to all of us. Regardless, I'm just glad to know it's fixed. Please feel free to come back anytime in the future if you have questions.

Take care,
Joe
Sep 16, 2020 at 10:15 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
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.