@Aegis21 posted:Now things get interesting. I hook up Lionel Legacy unit to system with the proper cables from MTH Serial cable from Legacy to TIU and one wire from legacy to third rail. Then put on track the ERR upgraded engine to run with the legacy controller. Power it all up, light comes on the engine and I throttle up and the engine moves forward a bit, sputters then stops with light out. Meanwhile down track a MTH engine starts some station chatter and comes to life. ???? Shutting power off and then back on still does not get the lionel engine light to come on. Yes I moved it to another section of track just to be sure to have clean track under it. So I take the engine back to the single test track I have set up with TMCC cab1 and engine functions as it should.
This sounds more like a power event than anything else.
What appears to have happened- the ERR engine overloaded or shorted your power supply. That power then returned and the DCS engine on the same power district/channel then missed the watchdog and started up in conventional.
This same power event then might have killed or damaged DCS signal.
Actually, the more I read this, your mainline track sounds like it has some problems. one possible answer- I don't know your track feed or your track system of joints (rail joints, pins or joiners) but that sure sounded like dead sections of track power. So badly so, as the engine rolled- one section lost power and another section the MTH train was on ALSO power cycled sans watchdog signal. Things that could allow that is a track system depending heavily on the rail joints to carry the power with few feeders and loose track joints. As the train rolls and draws current, it also can ever so slightly move or shift the rail and thus the loose joints at the ends of the track spark and go high resistance.
