I have a 3157 BR 60 locomotive that runs fine. The lights work and change on direction changes. But they will not turn off. On the other three engines that I have the lights will turn on and off. But not this one. It has the same 8 dipswitch decoder as the others and it is hooked up the same. I have an old 6023 control box that the only function I can control is turning the lights on and off. It just does not work on this one locomotive. The locomotives are run digitally. The accessories are analog. Any ideas?

The best that I can give you with my limited knowledge is, maybe. While the rear coupler does not have any wires going to it, it does have a copper ground going to it along with a strange hole above it. Is this a magnet to make the coupler work? In any case the light function button, which is the only button on the 6023 controller, does not activate it.

Thank you for your input. I will have to get pictures later tonight.

For all of you that have helped with your input, thank you. The long wait is due to work getting in the way of play. Correct me if I am wrong. If the lights are hooked up to the gray and yellow wire on the decoder, I am leaning toward the decoder being set for the function to be set for something other than the lights. Since I have a 6023 box that will only control one function, I cannot control the lights or change the one function that the function button controls. To do so I would need to upgrade to a mobile or central station. Does this ideas make since? Also, since the locomotive did not come with anything other than lights, why does the rear coupler have a contact point between it and the frame? Is this so that the rear articulating wheels will also ground the locomotive?