It may be the wires running along the metal of the door. Up high and forward would be the wires for the mirrors. What I did was either silicone all the wires or tape them down so that they cannot vibrate against the metal and make noise. Occasional pieces of tape won't work, you have to run the tape along the length of the wire.
Now all my noise (which isn't much anymore) is related to the OE foam liner buzzing against the metal in a few places (mostly on really low notes below 40Hz). Always having to track down a new buzz. :rolleyes:
