There’s a switch on top of my Lionel No. 2332 Pennsylvania GG1. I’ve heard it controls how the engine reverses. I’ve run the locomotive on a test track, and without my touching it the locomotive reversed following the transformer direction switch. Is everything working right? – Jim Rohrbach, San Mateo, Calif.
The switch on the roof turns the E-unit on and off. In one position it allows remote-control reversing by interrupting the current to the track. It will cycle through forward-neutral-reverse-neutral-forward and so forth. In the other position, it will disable the remote reversing and lock the locomotive in the state that it was in prior to moving the switch. If the engine is moving forward and the switch is toggled, it will stay in forward until you enable the E-unit once again.
Bob Keller discusses the modern Lionel GG1 in this video: https://www.trains.com/vid/toytrains/reviews/lionel-postwar-style-gg1-locomotive/
Read a review of MTH’s modern GG1: https://www.trains.com/ctt/news-reviews/reviews/o-gauge-railking-gg1-by-mth/
Learn more about the Pennsylvania Railroad by visiting their historial society’s website.