Greywolf, it appears they did test the old unit. When I had the problem I mentioned in my post "One for the brains trust", I mentioned the last LED bar not showing to the dealer then and the reply was that it was a faulty sender unit. I had to wait for one to come from Japan, so the job is being done today. When I dropped the bike off, the workshop manager mentioned that he has done a few on the 2014+ Stroms. I figured the sender unit would be similar or identical in most of the later model Suzukis.
Never argue with an idiot.......they drag you down to their level, then beat you with experience!