Hi there ,

I own a 2008 Mercedes C Class W204 and a few days ago I went ahead and installed a new head unit to my car. During the installation process, I had let the negative and positive wires touch accidently when wiring the camera power. This then stopped all electrics coming to the harness.

So I presumed it would be a blown fuse or something, after checking every single fuse visually and with a voltmeter, the fuses were fine ! So I used the voltmeter to check if there was any power coming at all to any wires in the radio harness but no luck again.

Now the radio harness is completely dead and not receiving power at all.

Any ideas ?

Thanks

Yes I did all this while connected to battery, the radio fuse behind the unit is fine, even tried plugging in the old head unit but won’t power on. So I’m sure what’s gone wrong, like you said maybe the spark burnt the harness.

How can i check if it’s the harness ?

Thanks