I bought a 2009 Touring model which had been rear ended. The previous owner had replaced the liftgate with one NOT from a Touring model. He removed all the insides from the damaged liftgate but had not installed them in the new one. It will open with the fob and the dash button but will only close manually. It feels loose, but when I lock the doors it can't be opened from outside. Any thoughts whether I can install the old parts? Where could I find a wiring diagram?