I have the same problem with my 08 edge and I can tell you that it is your amp that is located in the back panel on the passengers side .I took mine out played with the connection witch made it work for a while.You need to buy a new one. to look at the amp you need a # 50 torx socket to take off the seatbelt on the rear seat,then the panel will just come off with a little tug,the amp is behind the sub witch you need to undo 3 bolts ,the amp is on the back side of this chech your connection maybe you can get your's to work.Good luck a new on is around $160.00
