I have one but its not on my PC here at work. Basically, the chugger mounts to the frame which is a grounding point. For standard you need a reed switch that mounts to one of the crossbars on the motor frame and works off of a cam on the closest axle. One lead from this switch goes to the chugger unit, the other goes to the switch in the cab. The switch in the cab then gets wired to a hot lead from the motor pick up. That motor pick up lead goes to one of the screw terminals on an early reverse unit or an alternate point with a modern reverse unit. As the loco runs the reed switch is closed as it runs up the cam lobe and the chugger makes the noise. You can cut power to the chugger to stop said noise by flipping the switch in the cab and cutting power to the circuit. Chuggers are available, the reed switches are very scarce.
Tin
