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I found this old post from 2011 and have a question.  I have very little experience working on trains but slowly getting better.
 
I have a 2023 diesel with a 2023-14 horn which doesn't work.  I watched the video and performed the steps but no luck.  I even made sure the ground and power were good by using another horn (repro) for testing.
 
So, I don't know the part name,,,but the copper wired coil unit inside the horn appears to be the problem.  But, what could be broke?  I really don't know how it works but it seems that it is just copper wire wound around the metal cylinder designed to create the magnetic field to pull down the metal strip .....
 
Even if this cannot be repaired, I would like to understand how the copper wired unit works and what might be the cause of it not working.
 
I appreciate your reply
 
Happy New Year
Ron
 
 
 
 
Originally Posted by Timothy Sprague:
youtube is a great resource for repairs of all kinds of things. This one shows repair to the postwar horn. I've used it on my own stock, and it's worked about 50% of the time.




Let us know which way you choose to go.

Tim

 

Most problems I have encountered are caused by excessive handling and oxidation. The wire that comes out the back of the horn is very fragile. It doesn't take much bending for it to break off at the plastic bushing. Oxidation occurs at the contacts of the relay. The rear hinge area of the moving bottom plate and on the face of the contacts themselves.

After cleaning the oxidation points of the relay, a gentle working left to right of the set screw on the horn's back usually gets the thing going.

To all...

Thanks for your help.

 

I removed the cover and sanded (cleaned) the contacts for the vibrating arm and the top of the solenoid coil. The video that was posted on this string of discussions, showed that you can test if it works by touching a ground to the top of the vibrating arm and pushing it close to the solenoid coil...it will create a slight noise and pull the vibrating arm down to the solenoid coil.  It works in the video but does not work for my horn.  This seems to mean that the solenoid coil is bad.  Is this possible?  If it is bad, then the horn is gone...but I would like to understand how the coil could be bad.  It looks intact..but the copper wire surrounding the solenoid is covered with paper...so hard to tell.

 

Does this make sense? I assume the horn is gone...but would like to understand how the coil can get damaged or not work.

 

Thanks again


Ron

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