This may be a silly question but did the antenna harness have a blue wire? That blue wire has to be connected to the blue & white wire from the harness of the appradio, or to the red wire. It needs power to amplify the signal. I have mines connected to the red wire. At first I didn't connect it and I had static when I drove, but when the car was stationary it was great. I called up metra tech support that that is what he told me. After I connected it I have not had static since then. Heres a pic of what my antenna adapter looks like. Hope it helps.