The module I have actually plugged into the old radio, not ran off of an FM channel. I could then select Sirius on my HU and go through the channels on the HU like normal and not use a Sirius unit to change channels. The module was actually secured up under my dash on the old truck. The antenna plugged into the module and then the module plugged into a jack on the radio. I guess maybe I need to see if the plugs are the same for the Harley HU as my old Clarion HU.
2015 Denim Black RGS, Rhinehart 4" slipons, Stream Liner highway pegs, HD passenger back rest, JBL 6.5 in fairing, Clearview 13" windscreen