Hi, I just installed a new aftermarket radio/speakers/amp into my 2001 A4. I bought a radio harnest and hooked up all the wiring as in the graph. The front and rear speakers work great. The only issue is the amp goes on,but when I turn it on it automaticly goes into "Protective" or on my Rockford "Terminal Red" and the amp pwoer does not want to go into my subs? Did anyone ever has this issue? I hooked up all the wiring as needed. Im only thinking I might have not grounded it right. I have had the ground wire hooked up to the Rear Speaker Panel... on the middle bolt that you loosen up to remove the back panel.. Im thinking that might be the reason.... anyway any pointers who help. Thanks... P.S. I do have a remote wire running and working with the amp.