So I installed my Cobra 19 Ultra III (Walmart) and the rest of the Big Bill setup. I get power to the unit but no sound at all. No feed back, distortion, engine noise...nada. What gives? The power is connected the ACC fuse and the ground it is grounded to the frame under the driver side kick panel. I have the 3ft Firestik, quick disconnect and spring on a Bandi Mount. You think the unit is bad?