Mike, I had an issue years ago with the track signal in one area. The area was fed by 2 channels isolated by a lift out bridge that was wired to one channel. Isolated from the other. At some point the weather changed and what was a small gap in the center rails at the other end now had them touching bridging 2 channels. At some point I had blown one of the fast blow fuses. I hadn’t realized as I had power everywhere. The TMCC engines never knew the difference. But with the rails touching I had created one huge block that was to big trackage wise to put out a good signal for the DCS engines. So I basically had 2 issues. A bridged rail and a blown fuse. I forget the troubleshooting scenarios but it took 2 evenings to figure it out. I think what led me to the fuse issue was I disconnected the output at the TIU trying to troubleshoot it and for the life of me couldn’t figure out why I still had power to the rails in that block. I have since cut back on the center rail a bit and glued a piece of styrene between the rails.
Your not alone. It happens to all of us at some point.
