horn...dead battery

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  • cscott
    Senior Member
    • Oct 2002
    • 451

    #1

    horn...dead battery

    i was working on a pancake horn off the bike and i had a 6 volt battery for testing, after a while of horn testing the charged battery just died???
  • DEEBS47Chief1991
    Living The Dream
    • Jan 2023
    • 1256

    #2
    Yes. Other than an electric starter (which only applies to most 12V bikes), the horn takes the most current to operate on a motorcycle. It's basically a solid coil of wire from positive to negative volts to form an electromagnet. Once it pulls in one direction a set of points releases the hold of the electro magnet and it returns (under spring pressure) to it's normal position. At that point it re-energizes and this opening and closing of the circuit very quickly causes a high frequency sound that can be heard as a horn blaring.

    Long story - short, yes, it will drain your battery rather quickly. Just re-charge it after your testing.

    ezgif-3-f9e0c2abd5.jpg ezgif-8cb7ee375e323c.jpg
    Last edited by DEEBS47Chief1991; 09-30-2025, 03:15 PM.

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    • DEEBS47Chief1991
      Living The Dream
      • Jan 2023
      • 1256

      #3
      Some more information on horns:



      Horn rebuilding.jpg

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