Dmc selector and tree switches. Starting intermittently running on to stop ring. Start with the usual suspect of switches or wiring in the tree. All is good with them. In trouble shooting it, found if you have the TSL or the UTS switch engaged at take off, the car will not leave the floor until released. Makes sense, however, once in travel, if either switch or both are activated the car will not slow down. Car will go into slow down at the top floor(two stop) most of the time even when the switch or switches have been activated mid travel and did not slow down. If we pull wire off of UTS 1 terminal or TSL2 terminal at the COP or in machine room car will stop traveling but motor keeps turning. This acts correctly according to the prints. We had a spare main selector board on us, so we changed it, after doing this the car will stop when switches have been activated mid flight, but car did run on stop ring once after we changed the board.

Open for suggestions.