Hi,
Do a search: "Tsunami heavy steam sound decoder for Genesis Challenger"
This is a complete set of instructions for making your challenger sound right.
Here's a link to what is probably your decoder. Look at page 7 http://www.soundtraxx.com/manuals/quickstart.pdf
Springfield PA
What does the diagram that came with the decoder show?
I really didn't like the sound from my Athearn Genesis Challenger so i wanted to upgrade to a Soundtraxx Tsunami decoder. I am not an expert DCC installer by no means and during this installation I am getting a bit nervous. Can anyone help? I have the track pick-up leads attached and I have great Tsunami sound yet I have no power to the motor. Does anyone known which wires come from the motor? I have blue and white heading to the loco (headlight) and green and yellow. Are the green and yellow wires the motor wires? I wouldn't think so but I am afraid to go any further.