American Flyer 21100 4-4-2 Atlantic steam engine and tender Reading Lines

This American Flyer 21100 Reading Lines locomotive and tender has been boxed up since Nov. of 1980 and can't attest to if it ran then but it does not now. i performed some simple troubleshooting and couldn't determine a cause. was getting power from the tender. light bulb is burned out, tried a bulb from another engine and it lit up. the engine and tender bodies are in good shape. someone with more electrical knowledge than me would have a better chance of getting it running.