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Reply to "MTH Switcher Reliability Upgrade"

clem k posted:

I have the 2 rail version PS- 3  0-6-0. Had my dealer add the roller and tie all the ground wires together. Didn't need to run a extra wire because I have Kadee couplers on it, it operates in a 3 rail environment. Never stalls and smokes 100% better.

This had nothing to do with Kadee couplers for PS-3 steam.  The 6 pin wire harness for drawbar carries Track power between tender and engine.  So you can add pickups to either and tap into the AC Track power wires.  The engine boiler board runs all engine functions, and the tender board runs all tender functions.  So you can keep MTH couplers and still do what you want for PS-3 steam. 

There is no 5V Coupler wire on MTH trains???????  Couplers run off PV.

Now on a PS-2 engine with forward coupler and PS-2 board in tender, you can gain one wire back by removing coupler connection and repurposing the Forward Coupler trigger wire.  You could also do the headlight different and regain that wire.  G

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