Car Electronics Questions? Ask an Electronics Expert for Answers ASAP
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If the satellite adapter is not producing audio, then you may have a satellite adapter that is defective - provided you have checked the antenna connection to it, and also checked that the tuner you are hooking it to is not incompatible with whatever your sat adapter is, and also gone through registration for Sirius/XM satellite radio.
If the 'sat portion' is not a Sirius-type satellite radio adapter, let me know the specifics in more detail, and I will advise you as appropriate.