gunrunnerjohn posted:I don't think so Allan! The AC ground isn't the DC ground for the hall effect sensor, at least not in all cases. I believe pin-19 to pin-21 is the correct connection. Pin 19, AC GND To Hall Effect Sensor is NOT connected to pins 3 & 4! Pretty sure you'll release the magic smoke if you connect it your way.
Excellent advice. I now can access all of the messages. The station announcements and the conductor are pretty easy to hear when the train is standing still, but the dining car announcements are a challenge to hear when the engine is highballing down the pike, but I can fiddle with the speaker.
More of the story is to come, but thanks to gunrunner for how to hook things up.