I'm going to start this post by saying I have no MTH PS-3 locomotives and have no idea as to how they operate.
Our local Historical Society has a small O gauge display layout in their museum. They have it set up so that kids (of all ages) can simply push a button to set the trains in motion for a given amount of time. Everything is run conventionally. This works well except for one locomotive. They were given an MTH GP38 from 2015 (sorry I don't have the product number) It is on its own dedicated track. A staff member has to power up the transformer and wait until the loco "wakes up" then cycle it to forward to get it running. As this is a small museum, there isn't a huge amount of traffic. The limited number of volunteers makes it difficult to have someone stationed at the layout at all times. Of course, everyone wants to see this locomotive in action.
I'm thinking that the only way to make this engine work with the push button control is to bypass the PS-3 electronics and wire the motors directly to the track via a bridge rectifier. As long as the headlights, ditch lights and cab strobe work I think everyone would be happy. They can live without the electro-couplers and sound for obvious reasons. They just want a forward running puller.
Has anybody performed a conversion like this? Am I trying to oversimplify what needs to be done? What say you, electrical gurus.
Tom