Just put my 2010 GL1800 back together (body/shell) after adding some additional lighting.
When I initially replaced the center cowling/radio housing, the radio did not work. only to find I didn't get a plug completely inserted. Now with the bike complete, the external speakers (radio on or off) crackle and hiss like a bad antenna connection. This is amplified when the stereo is powered on.
I have never encountered this and hoping someone could assist.