Whining sound when using headlights and turn signals

1996 MAZDA PROTEGE
156,000 MILES • 1.5L • AUTOMATIC
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DEZYB78
  • MEMBER
  • 2 POSTS
When I turn my headlights on it makes a whining sound. It also does it when I use my turn signals. When I am not using either I don't hear the noise. What could be the problem?
Aug 18, 2020 at 10:59 PM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
Good morning,

Can you upload a video of the noise?

It could be the alternator making the noise but I need to hear it to be sure.

Roy
Aug 18, 2020 at 11:20 PM
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DEZYB78
  • MEMBER
  • 2 POSTS
I let the car set and didn't drive for one whole day and it stopped making the noise. Buy every once in a while the battery light will come on and I just bought a brand new battery like 2 weeks ago so I know it isn't that I need a new battery.
Aug 22, 2020 at 7:02 AM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
This sounds like the alternator is making the noise.

Can you test the voltage at the battery with the engine running?

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

Roy
Aug 22, 2020 at 10:38 AM
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