I had my N4 installed month ago. Everything was perfect until yesterday when they connected Pioneer CD Changer to it which was already installed before but wasn't connected. Now everytime I press any button on Screen or Remote to change Volume, Radio station, Source etc. I get STATIC BUZZING NOISE FROM THE SPEAKERS while Avic executes the change. What is wrong?

It sounds like a classic bad ground. I would run a new ground and see if that solves it. Later,

Robert

It sounds like a classic bad ground. I would run a new ground and see if that solves it. Later,

Robert

Do you mean New Ground for CD CHANGER?