I have a 08 Edge Limited AWD I just bought it and the sub does not work at all no bass at all I have found where it is but I am not sure if there is an amp behind it or in the vehicle somewhere else. Does anyone have any troubleshooting ideas or am I missing somthing simple that can shut it off? I checked the fuse that owners manual said was for the sub still nothing I can't find anything in the owners manual about an amp or sub thanks for any help!