Test ran my new 3rd RAIL BRASS O Scale Anniversary Series Great Northern M2 2-6-8-0 Sunset Model for the first time in conventionel mode the other day. It ran perfectly for a few feet in both forward and reverse (using direction button on power supply) and then shut down. Traced the problem to bad wiring connection from power source to track.. Fixed that but when I turned back on the power supply the engine will only go forward when using the direction button or when cycling the handle on the power supply on and off. Put another engine on track and it went forward and reverse using button without a problem.
What should I try, thank you