04-15-2010, 08:57 AM
You CAN test for shots before you install a decoder. Use your DVM ( digital volt meter). Test each motor lead to the frame. If you have any conductivity you have a short. Also if the motor has a metal frame and is mounted to the frame of the locomotive there could be a short there . Some times this short will not show up, but I would insulate the motor and use nylon screw to hold in place.