Don't want to be picky but Fixed 2 is a straight through connection that will allow power to the track but not turn the tiu on. You must use fixed 1 or an aux power supply to turn the tiu "on".
Since all you hear is a click when power is first applied with the problem engines ... That's a good thing. It means they're seeing the dcs watch dog signal ( you
must be using fixed 1)
So you still have 1 proto 2 and 1 proto3 that don't t want to add. I might reset the remote and start over with the problem engines, This will clear any ID conflicts, One engine on the track at a time. good luck
