Brake lights will not come on

LOZANO77

MEMBER
2004 CHEVROLET SILVERADO
5.3L
V8
200,000 MILES

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.

Sunday, September 13th, 2020 AT 2:45 PM

6 Replies

JACOBANDNICKOLAS

MECHANIC
109,885 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

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Sunday, September 13th, 2020 AT 5:45 PM

LOZANO77

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4 POSTS

So checked all fuses and wires you told me to and receiving power to all of them.

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Tuesday, September 15th, 2020 AT 4:04 PM

LOZANO77

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4 POSTS

White wire is not receiving power.

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Tuesday, September 15th, 2020 AT 4:05 PM

JACOBANDNICKOLAS

MECHANIC
109,885 POSTS

Is there power at the orange wire to the switch?

Joe

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Tuesday, September 15th, 2020 AT 7:13 PM

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.