I am trying to build an ABBA lash-up with my Lionel F3 (6-24520, 24521, 24522) using the instructions in the owner's manual. The train moves correctly and both A units smoke but I can't get the rear A unit coupler to fire. The coupler does open when I address that engine specifically.
Lead A unit 1516 (engine 16) powered
First B unit 1519 (engine 19) powered
2nd B unit 1517 (engine 17) non-powered
Rear A unit 1518 (engine 18) non-powered
Train Building keystrokes on Cab-1 TMCC:
TR, 1, 16, F, set
TR, 1, 19, set
TR, 1, 17, set
TR, 1,18, R, set
I have tried it with the last loco using R and without with the same results.
What am I missing?