My wife's has a J&M CB (on handlebar) on her Freewheeler and has been using it fine with her full face helmet and now that the warm weather is upon us she wants to use her half helmet.

I have a Harley headset that is for half helmets and want to know if their is an adapter cable from the J&M main headset plug to the HD mini plug of the headset?

Here is a photo of the J&M side of the headset plug.

 

Did you ever get this question answered? I have a friend with the same question.

 

No one has answered.

 

Check edsets.com.

 

I'd reach out to http://www.sierra-mc.com and explain to them what you're looking for. They may not list it on their website, but they might have it.

 

I have been in the same boat for a year and a half. My wife has a J&M handlebar CB and wants a helmet-less over the ear HD headset. I haven't been able to find a match-up, so after E-mailing J&M for their pinout, and looking up the HD pinout on Google, I was able to match up the functions and solder them together. Just tested it out tonight with my hand-held CB and it works!

All connections are HD to J&M:
Red to White
Blue to Red
Black & Green to Brown
White to Green
Ground to both grounds

Hope this helps!