1999 Chevy Silverado Third Brake light and License plate li

1999 CHEVROLET SILVERADO
120,000 MILES • V8 • 2WD • AUTOMATIC
Avatar
KCLARKE
  • MEMBER
  • 1 POST
I have to get a light inspection done but won't pass until the third brake light and (1) of the license plates lights gets fixed.

What could cause only 1 light to work and the other not. The same with the third brake light, the cargo light works fine but the brake lights don't and they are in the same area/connection.
Jan 4, 2010 at 11:22 AM
Advertisement
Avatar
JDL
  • ✓ASE Certified Mechanic
  • 16,098 POSTS
  • ASE Certified Mechanic
Welcome to the forum, check the bulb where applicable. Check for voltage and ground at the circuit. Do the lower brake lites work? There is a fuse for the high-mount brake lite, underhood fuse box, use a teslite, the circuit goes hot when you step on the brake?
Jan 4, 2010 at 11:41 AM
Avatar
KCLARKE
  • MEMBER
  • 1 POST
Replaced the bulbs in both the third brake and cargo lights along with the license plate lights. Lower brake lights work fine.

Cargo light bulb were bad and now work. Third brake lights looked bad and replaced but still done work. Lights on license plate were bad (1) starting working the other does not.

I will check the fuse and see if that helps. I just don't understand the third light as it appears to be on the same wiring as the cargo lights and the same goes for the license plate light??? Any ideas would be great I have to get this resolved asap.
Jan 4, 2010 at 1:38 PM
Avatar
JDL
  • ✓ASE Certified Mechanic
  • 16,098 POSTS
  • ASE Certified Mechanic
Your high and low brake lites, protected by different fuses. The same for the license plate lamps. If you have a testlite, maybe you can check for voltage and ground at the bulb socket?
Jan 4, 2010 at 2:47 PM
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.