Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - View Single Post - Whine at higher volumes
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Old 05-31-2019, 10:01 PM   #2
Sparkloc
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Location: Stafford, TX
What I Drive: 2001 Ford Focus ZX3 Hatchback

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Sounds like alternator whine. Checc all your ground locations and if you have multiples wires to one ground pin them to different grounds
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