Okay i think I am half way there.
1. I did get the horn....so I think we have connection. However, after shutting down power and powering back up in run mode I get no movement with remote.
So I guess the trigger to take it from conventional mode to TMCC is hitting ENG. That is where I am getting no movement. I got the horn as the engine number has been set. it will still run conventionally, but not TMCC. The video said something about an AUX number. Do i need to add something else?
Again, brand new Legacy engine....