brake lights wiring diagrams please?

1999 CHEVROLET SUBURBAN
225,000 MILES • 5.7L • V8 • 2WD • AUTOMATIC
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EKSMALL
  • MEMBER
  • 1 POST
All 3 brake lights are not working. fuse is good,bulbs are good, changed brake light switch...still not working, hazard lights do not work. tail lights work when headlight switch is on,interior lights work. what else could it be?
May 3, 2014 at 4:00 PM
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DANNY L
  • ✓ASE Certified Mechanic
  • 5,648 POSTS
  • ASE Certified Mechanic
Hello, I'm Danny.

Here is the diagram you requested. Sounds like have an open on the brake circuit wiring. Here is a tutorial showing how to test electrical wiring:

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

I've attached the brake system wiring diagram below for your vehicle. I've cut the picture in half so you can view larger. Hope this helps and thanks for using 2CarPros.
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Professional Diagram for 2CarPros Members
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Professional Diagram for 2CarPros Members
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Feb 5, 2021 at 10:53 AM
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