Dug out an old N Gauge train collection and have a Atlas The Milwaukee Road Locomotive that does not run. The light bulb in the front does light up and I can hear faint electric spark sounds when I push the train on the track. How do I know if this is a dummy or just not working? Here are the pics
https://drive.google.com/open?id=0Bwns7f1Ly3k1cVF5a2xhX3dfajg
Your locomotive is the old Atlas first generation FM C-Liner. It was made by Riverossi for Atlas. It has the Riverossi pancake motor. How long since you ran this locomotive. They were terrible runners, but you can try lubricating the gears. Take the shell off, turn it upside down and apply power to the wheel and see if it will loosen up after lubing.