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Reply to "Internal ZW/VW transformer grounding location?"

Personal experience.  I did a zener diode install identical to the above link on a ZW, and had to reverse the track leads in order for electronic horns to work properly.  

  1. Mitch 

Reverse the diode.   The stud type diodes can't be reversed easy, but often are made two ways, annode stud or cathode stud. (They should note that really; but your context was a mystery for me too.)

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