I am bench testing an MTH 3 position Semaphore (3 wires, black, green, red) with a Scale Trax ITAD. I am wiring according to package directions. I bought both of these items years ago at a train show, and both were new in box.
My issue is that the semaphore never moves to red. It is in the green position until I activate the ITAD with motion (of my hand, to mimic a train passing) at which time it moves to yellow. Then after the built in delay, it moves back to green.
From the instructions, this doesn't appear to be the proper behavior.
Has anyone experienced this before? I'm wondering if either the ITAD or Semaphore is defective?
Thanks in advance for any insights.