Sound systems for model railroads have their fans and detractors. In this case the customer wanted a different system for his own reasons. The Train Buddy makes it happen. The video discusses electrical discovery techniques when documentation is scarce or non-existent. We discuss the planning and execution through a 3 part series. The first part shows the wire discovery using the Internet and meter usage to determine and verify the wiring without disassembly of the expensive and very well built steam engine. The second part shows techniques for soldering, tinning, wire placement and shrink tube use. The rails and speaker are connected. The third part continues the wiring of motor and lights and then programming the address with a Digitrax DT402D throttle.