Step 4: Connect the other end of the FEA into the FM OUT connector of your SIRIUS vehicle dock
Plug the FM Extender Antenna into the FM OUT connector of the vehicle dock. (Figure 26)
FM OUT 
From FM Extender Antenna
Figure 26
Step 5: Find an FM channel which is not broadcasting in your area
Turn off your SIRIUS radio. Turn on your vehicle’s FM radio and tune through the FM channels on your vehicle’s radio to locate an FM channel that is not broadcasting in your area. (Figure
27)You should only hear static or silence on this channel. Use the tune function of your radio rather than the scan function to search for a channel. If you’re not sure which FM channels are not broadcasting in your home or travel cities, you can also go to http://sirius.com/fmchannel and search for a suggested FM channel based on your zip code.
ATIC
ST
OR
SILENCE
Figure 27
If you use an FM channel that is being used by a local broadcaster, it will interfere with the per- formance of your SIRIUS radio. Once you have located an FM channel that is not broadcasting