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I am trying to help a friend set up a layout.  He has the Lionel ZW (Controller) with 4 bricks.  Large layout and using all four channels of the xfrmr.  Had a problem with two main lines, one on leg A, other on leg D.  Kept getting a short circuit???  Checked all wiring and track pins.  Then measured xfmr outputs.  Each leg measured 16v to the "U" post.  Then measured across the "U" posts, from Leg A, U to Leg D, U measured 32v.  I've heard of a "false positive", is that measuring peak-to-peak voltage?  Or is it feasible that the transformer is internally miswired??

 

What was real interesting is a removed the wire connecting the A "U" post and connected it to the D "U" post and the problem went away.  OR SO I THOUGHT.  Now I have the same problem between the "B" U post and D U post.   Any ideas what may be going on??

 

Thanks

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