Lionmaster Big Boy cab constantly flashes

I have had issues with my 6-11149 Big Boy, and I bought mine brand new old stock in 2019. Mine kept intermittently speeding up out of control, like it was in conventional mode running on full throttle.  I took it apart and started unplugging plugs and plugging them back in repeatedly to self clean the plugs and their connectors. I did the same thing with the R2LC board. I also sprayed tuner cleaner carefully on the plugs, to help clean the contacts. A trick I learned working on VCR's and a camcorder. Very important to do every single one, to rule out poor connection.  My Big Boy has not malfunctioned again as of yet. I have started it up and run it at least twenty times or so, and so far so good. Try self cleaning your plugs, and connectors. Being careful not to pull on the wires very hard, take your time. Pry the plugs apart with a thin blade if possible to avoid stress on the wires.  And when your done be sure that every connection on that chassis is properly plugged in. Make sure ground wires are tight etc.  Maybe it is not a malfunctioning board, rather poor connection. Since the electronics are no longer available for this locomotive, it is worth a shot.

Secarider,

Thanks for the response. I'll definitely give it a try.

This model has no diagnostic codes, so this is likely a programming issue.  I'd reprogram it, paying special attention to the proper keys and codes.  Here's the reprogramming sequence from the manual.

If the reset doesn't do it, there may be a problem with the locomotive.  Sadly, most of the electronics have been declared obsolete by Lionel and are no longer available.

I reprogramed as you suggested, John, and it worked! The cab flashing has stopped. Interestingly I had done this procedure yesterday using the Cab3 app. Today I used the Cab2 remote. Not sure if that was the difference but it worked.

The lights still stay on whenever power is applied. Secarider, does your Big Boy do the same thing? Could be normal for this engine.

I would have to put it back on the track to be sure. But I believe the lights stay on as soon as power is applied to the track. After you select the locomotive and start it up, you should be able to turn the head light on and off off with AUX 2.  I don't believe you can turn any other lights on and off manually.

I do believe the cab light is always on.

Just powered up my 11149.  All lights come on (back-up light for a second).  No smoke at idle.  Underway, cab light goes out.  Smoke on or off the fan stays on.  Also had a problem a few years ago with engine taking off at full throttle on occasion.  We found a wire was shorting on a metal piece inside that was the problem.  No trouble since.  Great sound system.  RICH

Thanks for the light confirmation. I was really happy to be able to get this engine. I have the original TMCC Lionmaster Big Boy and even though they look identical, the Legacy runs much smoother and yes, the sounds are awesome.

I liked the sounds for the Legacy Lionmaster T1 Duplex so much that I converted my scale T1 Duplex to Legacy and used the same sound board, super sounds!

Lionel T1 Duplex Legacy Upgrade