My horns are not working, I've checked and get power to both so I'm guessing it's the horns themselves. I am thinking I'll replace them and take my time taking them apart to fix when I get around to it. So today's question is what do people suggest? I found this set that seems like a good option: https://www.godzillaraceworks.com/electrical/hella-supertone-horn-kit-for-datsun-240z-260z-280z-280zx-fairlady-z I know that the red will stand out, i could always paint them black.

Do they have good grounds? Have you tried to bench test them?