Hello.
to be 100% that the game is giving information about turning lights, the best test you can do is starting SImDash and ETS2. In SimDash open the "View->Data" menu. Activate turning lights in the simulator and check if the "View->Data..." page shows that turning lights are ON.
If it doesn't, it could be that ETS2 stopped giving this information or that SimDash needs some change.
Please do the test, and I will see what I can do..
thanks
Cristiano