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Left blinker

Tiny
SETTERGRENH
  • MEMBER
  • 1999 GMC SONOMA
  • 2.1L
  • 4 CYL
  • RWD
  • AUTOMATIC
  • 118,000 MILES
During the day my left blinker works, but at night it does not. It flashes once the stays on dim. That causes the left brake light not to work. The brake light works during the day but not at night. I have changed the socket too. Please help tired of getting pulled over!
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Tuesday, July 18th, 2017 AT 3:18 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Hello,

It sounds like you have a bad ground which is back feeding into the lighting circuits. Here are a couple of guides and some wiring diagrams (Below) that should help us get the problem fixed.

https://www.2carpros.com/articles/no-tail-lights-exterior-running-lights-tail-lights-out

and

https://www.2carpros.com/articles/turn-signals-not-working-blinker

and

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

Please run some tests and get back to us we are interested to see what it is.

Cheers, Ken
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Wednesday, July 19th, 2017 AT 12:11 PM

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