Just wondering if someone could be of some help to me, I've got a focus 1.8tdci mk2 2008 and i recently fitted a sub and amp to the standard head unit. It's been fine for ages but now all of a sudden whenever I use the AUX the passenger side speakers Front and rear seem to like have a static sound to it also every time I use the blower or something electrical it makes a loud hiss? :S
It's very odd as well because whenever i plug my phone into charge it doesn't seem to make the sound half as much but it's still there, but if i put the radio/cd player into Radio or CD all the speakers work fine?
Any idea's on what it could be? Any help would be appreciated thanks!