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measuring pin 2 to GND will indicate 0V or 5V on the FET driver for NORMAL/REVERSE. This pin also drives the LEDs, so observing the LEDs for N/R is much easier. Pin 1 and pin 8 of the tortoise connector will measure +/-12V depending on switch state.
Failure Log
10/12/23 Pueblo Railfair, ITC on Mike Maline module failed. Troubleshooting, but sounds like U1 went bad
3/xx/23 Garden City, ITC on Mike Wilson Greenland went bad, replaced U1