GunRunnerJohn, I tried the feature reset on both T-1 locomotives. There was no change.
GGG, I wasn't sure whether or not the TIU would be in the equation, but figured I would ask.
RJR, the soft key feature is what I tried first, but failed to mention that in my original post.
I tried the engine reset on both the other night, with no change. So I removed the boiler on both engines and put my multimeter on the LED. The voltage through the ohm meter was enough to get the LED to flicker (on both engine boilers). For "laughs", I removed the boiler from my PS3 WM H-9 to compare wiring from the boiler mounted board. My "guess" was that the H-9 wiring and the AFT #1 wiring would be same from the board connector out to the LED connectors. They are the same. Compared the Reading to the AFT #1, the only difference was the additional wire for the number board lead.
Both of the T-1's were purchased in the fall of 2017. Both were tested and functioned correctly. The AFT #1 has since been on display in my office at work. The Reading unit being run often enough until I had the issue last November and it went to the technician. Now I would understand the possibility that the board on the Reading T-1 potentially being damaged do to the high current draw when the motor went bad - only a guess since I am not a technician or that savvy with electronics. The AFT #1 however baffles me. This is what prompted me to ask if it could be the software upgrade.
I may try going back to the DCS 6.00 upgrade and see what happens. Nothing beats a try except a failure... lol...