No running lights

Tiny
ROBERSON3644
  • MEMBER
  • 2003 BUICK CENTURY
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 276,342 MILES
My brake lights and everything work fine. But my running lights will not turn on. I've changed fuses, traced the wires. I'm at a loss. Do I just need a new fuse box?
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Thursday, August 1st, 2019 AT 9:13 AM

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Tiny
JACOBANDNICKOLAS
  • EXPERT
Welcome to 2CarPros.

It's unlikely the fuse box is bad. Do me a favor. I attached a small portion of a wiring schematic. Reconfirm the fuse is good (power to both sides) and check the parking light relay.

If you have another relay with the same part number, just switch them to see if that makes a difference.

Here are a few links you may find helpful. Remember, a fuse can look good and be bad. That is why you need to check for power to both sides of it or remove it and check for continuity.

______________________

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

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

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

https://www.2carpros.com/articles/how-to-use-a-voltmeter

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

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

______________________

If the fuses are good, I suspect it is the relay. Let me know what you find or if you have other questions.

Take care,

Joe
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Thursday, August 1st, 2019 AT 9:38 PM

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