You have a switch on the dash to the right of the steering wheel for power "Main" and "AUX". If I'm not mistaken, (don't have my coach to look at for reference at the moment)the switch needs to be in the "AUX" position for your surround sound to work. In addition, there is another rocker switch up in the forward overhead storage compartment on the passenger side, the one with the DVD player in it, that is labeled "TV" and "Radio". Depending on the selection this switch is in and what you are trying to get surround sound from (radio or tv)determines where the feed goes to. So, if you are trying to get surround sound from your tv...make sure that switch is in the "TV" position as well.