OK, for the possible interest of those who have helped during my nearly 2-month-long saga with the smoke on my Legacy SW-7--it kept shutting off and giving the two cab blinks--here, finally, finally, is the really "final" outcome:
My two previous "fixes" did not, ultimately, solve the problem--
--Not checking the wiring and tightening whatever I could.
--Not the new smoke unit board with a thermistor that measured 51K ohms as opposed to the old one at 62K ohms.
At the end of the day, the solution was a new RCMC (for this engine, at least, actually called a RCMD). Evidently, for whatever reason, the board had a failure that caused the smoke unit behavior I was seeing.
In any event, that was the "final" fix--after nearly 2 months of frustration. During that time, I took the engine apart and put it back together so many times, I can now do it with my eyes closed. The only thing I can't do with my eyes closed is take the connectors off the old RCMC and put them on the new RCMC. At least on this little diesel switcher, the board is so cramped and so shoehorned in, and the wires are so short (there must be a wire shortage in China), that you really need the hands of a 12-year-old girl to manipulate the connectors. As it happens, my hands are anything but that.😒 Still, somehow, I got it done...and now, finally, we're smoking...and smoking...and the cab light is not blinking.
