SOURCE: Lionel Polar Express Berkshire Locomotive will only go in reverse
No doubt the transistor in the motor controller inside the engine is shorted TIP31C Q6 If you have the skills you can repair the unit. Parts are cheap, like 50 cents. Expense is shipping. Have repaired at least one that had the probblem you describe
good luck
SOURCE: The Cw 80 watt transformer
If you have a volt meter you can check the rails for power, Check the transformer wiring to the first rail connection and then along the rails for loss loose connection(s). If you have power to the rails it is an issue with the Engine, Check any brush or rail riders (connections) for a bent or broken tab. If for a temp fix in a broken connection tab or brush you can use Tin foil. Hope this helps.
SOURCE: New Lionel Polar Express train set-up issue. The
My son just got this train and we are having the same problem. Taking the last car off solved the problem for us. I think it has something to do with accessories and the transformer voltage output (See page 14 and 15 of the instructions).
I have still not determined why it won't run with the final car but am assuming it has something to do with the lights on the cars pulling too many amps and not enough left to run the train. I will let you know if I find a solution. If anyone else knows how to solve the issue, any assistance would be greatly appreciated.
Thanks
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