I have a pioneer p77dh cd player for my truck. Everything was fine until I unhooked my old amp and installed a new one. Now my amp goes out on "protect" when ever I plug the RCA jacks into the amp and the light goes off when I unplug them. After doing everything the new amp manual says to do the end result is that my "source" is bad. I guess they mean my cd player. I even tried using different (brand new) RCA jacks.