Thanks for the follow up.
no sound from dome, I did open it to confirm there was power to the red and blue wires.
I have it wired direct from the dome to the MFD.
No radar on the sensor list.
After some hours resetting etc, I ended up running a separate Cat 5 wire between the dome and the MFD which got things working.
Not sure where connection issue is though- could be the separate cable ordered with the system or the 5' lead that comes from the dome.
Have a replacement cable being shipped, hopefully resolves it.
If not, we'll have the isuue isolated to the lead from the dome.
Not sure that part is available through Furuno so they may have to send a new dome.
I really wish they would just use two separate cables for power and comms.
Thought about replacing the connector plugs but I don't want Furuno refusing the warranty cable replacement.
Thanks again!