looking through my kenwood wiring diagram that came with the unit which is only 2 yrs old today. It says to wire the unit via red wire for ignition only. That is the default wiring for my unit. It does state that option 2 using the yellow input wire was for V.W and Audi vehicles. You dont say which way yours is wired. It may or maynot be the cause of your touble , but if the new connects2 does the same again , it may well be a prime suspect. ...
