Sponsored Links (Register now to hide all advertisements)
It is more than convenient. When the generator is charging, it will provide a direct shot of current flow to the horn when functioning. The horn is a high draw load so it needs all the advantage it can get. The horn button is the end of the grounding circuit for the horn.
Test your horn by direct jumper connection to the battery to make sure it's working. The horn is shunt wound so it is not polarity sensitive. The power wire from the cut out also includes the power for the light switch so just be aware of that. The wire inside an old horn/light switch rod can deteriorate to where it will either cause the horn to sound or it won't function at all depending on whether it shorts out or is open circuit respectively.