I have to add to this...
MY RIGHT TURN SIGNAL DIDN'T WORK ON MY 12 1199S AT FIRST, AND AS TIME WENT ON THE PROBLEM IS GETTING WORSE AND WORSE. NOW AFTER THE BIKE WARMED UP, I HAD A HARD TIME SELECTING THE DIFFERENT POWER MODES, "THEN" THE BRIGHTS WOULD EITHER NOT TURN ON OR GET STUCK ON AFTER BEING SELECTED...
I called up Ducati Milwaukee and they immediately got back to me about a "piggy-back" system Ducati developed for said problem (the TSB - technical service bulletin - literally read off almost verbatim what I was telling them) that helps eliminate this issue on some 1199's
I haven't had time to get the bike up there and drop her off but once I do I'll write again...
HOPE this helps