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12V Whining Noises

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My fiesta 1.25 56 plate has developed a strange wheezing/whining noise from the 12V plug in the cabin. It only seams to appear when I charge my phone from a low battery state as though it is trying to suck more power in,It gets louder s I acelerate a bit like a tinny turbo. is it something should be worried about or is it nothing. Cheers

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It's might be a leaking capacitor in the 12V port. They basically store power to smooth the outflow, and they tend to make a high-pitched whine when they're going bad.

You could take the socket out and have a look around. Usual signs are the capacitor bulging, or brown residue on the end of the capacitor.

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