I have just finished installing a Soundtraxx Tsunami TSU-1000 heavy steam sound decoder into a Bachmann 4-8-4. (Some of you may recall that I started this project over a year ago.
Work and life have been nutso since then, finally got back to it.)
Everything works fine except for one thing: The headlight will not turn off. As soon as I put it on a powered track the headlight comes on. The rear light works normally, and is directional as it should be. When I push the key to turn the light on, I can hear the dynamo sound come on and the fault light on he decoder lights up, which Soundtraxx says it is supposed to do. The LED I am using for the head light dims slightly. When I push the key to turn the lights off the dynamo shuts down, the fault light goes out, and the LED brightens slightly. I have no issue at all with the rear light. I wired the LED according to the instructions in the Soundtraxx manual. I used a 680 ohm 1/4 watt resistor between the white headlight wire and the negative lead of the LED. I have double checked that I am using the proper white wire. I have insulated all connections.
I would really like to avoid having to use one of the other function wires to control the headlight if possible.
I just can't figure out why the headlight will not go out.Can anyone give me any ideas?