Odd Buzzing at Wheel Well?!

[Snippy]

Hi all,
So this one’s an odd one. While working on my truck I noticed an extremely faint buzzing / clicking sound originating somewhere near my driver side rear wheel well.

It’s so faint my phone can barely pick it up. What could it possibly be? This is while the truck is completely off by the way.

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[Heavishot]

Hi all,
So this one’s an odd one. While working on my truck I noticed an extremely faint buzzing / clicking sound originating somewhere near my driver side rear wheel well.

It’s so faint my phone can barely pick it up. What could it possibly be? This is while the truck is completely off by the way.

Is it a Powerboost? I’ve heard all manner of noises coming from mine at odd times.

 

[Snippy]

Is it a Powerboost? I’ve heard all manner of noises coming from mine at odd times.

It is not, specs are: Supercrew, 3.5 eco, 3.55 gears, FX4, XLT 302A.

The only thing I can think of is the 400w outlet in the bed, but I don't think its coming from there.

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