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Help please MK7 Changing Stereo + interference noise - Help on changing stereo

Cyber_killer
Cyber_killer
in Ford Fiesta Club

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Hi all,

my 2012 MK7 has developed a unusual fault.. The stereo creates an awful interference sound and it does this turned on or off. I have to remove fuse 21 to stop it.

Anyway I decided to test if it was the stereo at fault. I have another MK7.5 with the same unit ( Same connectors) both have no phone kit or anything. When i swap the stereos they do not work in each Fiesta.  They come on but have no output? They are not asking for pin codes. 

I just want to replace the stereo in the car to see if it is that at fault, anyone any idea how to do it? I know how remove them etc, its just weird that when its installed neither stereo work in either car.  When i put them back in the original cars they work again..

 

The stereos do have different part numbers but look identical. I have noticed on eBay a lot of people sell the stereos with the displays, do you need to change the display with the stereo? are they paired?

 

Thanks 🙂

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