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Fiesta Mk7 Aux Buzzing - Ground?


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Hi Guys,

Ive got the Mk7 Zetec s with Aux Only.

Ive recently bought a brodit phone holder, and run one of these adapters to both the aux and cigarette lighter for charging.


It works fine but...

When the USB is plugged into my cigarette lighter charger i get a 'whine' when the engine is on through the stereo and if i turn the volume up on the radio (to say 13+) i also get a dull buzzing/fuzzing. (although this happens even with no cigarette lighter).

Noise is quite annoying for quiet/mellow songs. Does anybody have the same issue?

Ive done a little research, but does anybody know what the ground location for the cigarette lighter is? I've read its because the radio and cigarette lighter don't ground at the same point. Bit of a nooblet at all of this.



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