Headlights fading

Tiny
J.SHIP
  • MEMBER
  • 1999 CHEVROLET CAVALIER
Electrical problem
1999 Chevy Cavalier 4 cyl Two Wheel Drive 122222 miles

when driving at night my headlights fade from bright to dim and back and forth. Same thing when high beams are on. Any suggestions?
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Sunday, February 15th, 2009 AT 10:07 AM

1 Reply

Tiny
SQM
  • EXPERT
Hello,

If you are noticing the headlight gets brighter as the engine revs up then it could be due to a bad alternator.
So checking the alternator should be a good first step.

Here is a guide on how to test the alternator:

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

I have attached diagrams for your reference.

Please let me know if you have any questions.
Thank you.
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Thursday, November 11th, 2021 AT 2:48 PM

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