I have a K Line Mikado here that is only picking up ground through the drawbar from the tender wheels. Is there a wire that I can trace for continuity from the loco wheels? Or is something fried? The other weird thing that happens is that because it gets sporadic grounding, the coupler fires open by itself every time the ground is not present.
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Hi for the forum members to help you we need the engine item number!
Most important!!
then we'll all help you figure out your problem!
Alan
Look at the circuit board that the coupler wires attach to. On certain K-Line engines, a trace blows on the board and that causes the coupler to open intermittently.
It's probably a trace that goes to the third rail. That trace likes to blow on Williams reverse boards, too.
Marty, maybe pins 3 & 4? 
correct John, sorry
I have to get you once in a while, I'm usually on the receiving end. 
I can catch as well as I can pitch. John, feel free to correct me any time for anything I say wrong. If it comes from a good guy like yourself it is always received well.
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