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The TMCC and Legacy Flickering Headlamp Mystery

SJ Scott JOGR Forum Member

I run both DCS and Legacy/TMCC via a Cab 1L unit on my layout. If I place a Legacy diesel on the track, everything works perfectly. However, I have a TMCC and  Legacy steam engine both with the optical connection to the tender and for both, the headlamp is off most of the time and flickers occasionally. Recently I got a Legacy switcher with a cable tether connection instead of the optical drawbar. Everything works perfectly just like the diesels. Clearly there is some kind of signal issue on my layout even though I went to great lengths to try to create proper ground and signal setup. Is there something obvious I'm missing or does anyone know of a corrective fix? Thanks!

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gunrunnerjohngunrunnerjohnOGR Forum Member SUPPORTING MEMBERDIGITAL SUBSCRIBER

Well, the tender IR connection has nothing to do with this issue, I can tell you that.  The tender connection is a one-way optical connection, it is transmitted from the locomotive to the tender.  The locomotive doesn't even know the tender is there.

How about the actual product numbers of the problem steamers?  I can't imagine this has anything to do with the fact that these have the optical link to the tender.

SJ Scott JOGR Forum Member

John, thanks. I'll check the product numbers. I seem to recall I did get a TMCC steam engine with an tether connection on eBay that I returned and also saw the flickering headlamp. It's weird. I did see a thread long ago where there was something like that and it had to do with poor ground in a power strip that the Cab 2 was plugged in to.

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