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Strange brake light issue

Tiny
DZNUC
  • MEMBER
  • 2006 KIA SPORTAGE
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 130,000 MILES
With engine off and brakes applied, third brake light and passenger brake light work, driver's side brake light does not work (guessing bulb needs replacement). But when brakes are applied with engine running, third brake light works, but both lower brake lights do not work.
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Wednesday, November 14th, 2018 AT 3:51 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,895 POSTS
That seems weird because they are all on the same circuit. Here are the brake light wiring diagrams so you can see how the system works. Remove both lower bulb to inspect and replace as needed.

https://www.2carpros.com/articles/brake-lights-not-working

See where you are losing power. Check out the diagrams (below). Please let us know what happens.

Cheers, Ken
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Thursday, November 15th, 2018 AT 5:26 PM

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