PS-1 Engines come out of the box programed as mentioned above where as the whistle only works when the engine is running forward or reverse (as I remember, its been a long time since I was up on this). In neutral the bell works, with the whistle button. In the list of program settings one allows you to program the engine where the whistle blows with whistle button and the bell rings with the bell button when using a Z-4000. MTH programed the PS-1 engines (first sentence above describes) because PS-1 predates the Z-4000 transformer. When PS-1 came out the old ZW transformers had no bell button as well as many of the older transformers........Confused?? ME TOO, However I know the PS-1 can be programed where the whistle button blows the whistle and bell button rings the bell...............
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