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Drivers side taillight, brake light and turn signal not working

Tiny
WES MITCHELL
  • MEMBER
  • 2007 CHEVROLET EXPRESS
  • 4.3L
  • V6
  • 2WD
  • AUTOMATIC
  • 224,000 MILES
Tailight does not work at all when running lights are on. Brakelight does not work at all either. Blinker works seldom but seems to work when steering wheel is in certain position. When turn signal does work tailight does not. Switched bulb made no difference.
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Tuesday, December 17th, 2019 AT 4:30 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,877 POSTS
Hello,

It sounds like the flasher module is out. to be sure let's check the fuses because there are many that run the system here is a guide to help and the fuse location with the blinker wiring diagrams to show you how the system works.

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

and

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

Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.
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Thursday, December 19th, 2019 AT 12:55 PM

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