What you need to do is make sure your radio is on and it displays "antenna not detected". Disconnect the cable from the antenna. Grab a screwdriver or other metal object and touch it to the center pin or wire that's exposed. Make sure you are only touching the wire and not the outer housing, think of the old game "Operation". If your radio continues to display "antenna not detected" you have a bad cable or pigtail cable that's converting your RG6 to the sirius input. However, if it displays "acquiring signal" or gets a reception and starts playing a station, then you know it's the antenna. Who did you buy this from? If it was us (TSS Radio) give us a call and we can handle it.