Problem has never gone away and we have been trying different things to get to the bottom of it. Still no luck. Group of three, car three is the one that we have had the issues with and no rhyme or reason of shutting down with fault 7. However, if car 2 has power shut off, car three does not fault out. Car two starting faulting out with 7 and we were looking at that car while waiting for parts we noticed that car 3 does not fault out. We have had car 2 shut down for over 45 days and no issues. Turned it on and three days later car 3 faults with 7. Changed power supplies on all three, dsp cards, encoders, gov optical readers, encoder wiring, check terminals, connectors etc. Since COVID we can afford to have one car shut down, but soon that will not be the case.

Looking for ideas?