schematics for MTH subway cars

Jim, sorry for your bad luck.  I wish more people would read posts like this and dump the ZW transformers for more modern and much more powerful transformers.  Like I stated many times before, the old ZW was made in the middle of the last century.  I have no idea why anyone would use one (without protection) to run modern trains.   Alan, the test rig is for testing boards.  What am I missing.  I have been testing questionable boards for years.  What are you telling the poster, an MTH tech  (I am) can not test boards in their test fixture.  Think what you are telling the poster.  What other boards are you talking about?

MTH does not publish the electronic schematics. 

If you aren't the original owner and don't know the MTH model # or perhaps purchased it out-of-box, post a photo of the electronics to confirm you have a "stock" engine so we know exactly what you're up against.

When you say the lights come on, are you talking about lights in the "motorized" engine car?

Do you hear a faint relay click from the engine car when you initially apply power?

Most of the general schematics can be had by an MTH tech on the MTH tech site.  I use it often and have not seen any subway info.  All basic diesel, steam, and others are available for us to view.  I am sure if you posted your item number you would get more response.   I see many who like to give it the old school try and end up paying new school money in the long run.  If you do not know the system, give it to someone who does.  The unfortunate thing for many today is the trains are not something everyone can work on.  Unlike post war where anyone can work on those.  No special skills needed.