horn problems

[BIGBERTHA]

I have a 1976 K10, I just replaced the turn signal switch, it took me a little while since it was my first time. I got everything back together, and the battery was dead. I replaced the battery and my turn signals work fine, but now I have no horn. It was working before I took it apart. The relay is clicking but no horn. If I take the button off and push the ring with my hands I get a small shock

[ray_mcavoy]

The fact that the relay is clicking means your horn button is working correctly. The shock you're receiving when touching the metal ring is likely inductive "kickback" from the horn relay's coil.

Since the horn button is causing the relay to operate, you'll have to do some additional testing to figure out what is wrong. Start by using a test light or voltmeter to see if you have power on the dark green wire at the horn relay with the horn button held down. No power on the dark green wire means the contacts in the horn relay are bad. The clicking you hear is the contacts closing ... but if they're bad, they won't pass power on to the horn.

If the relay is okay, some other things to check include:
-check the dark green wire to make sure it has power out at the horn end (with the button held down of course).
-inspect the connector on the horn for signs of corrosion.
-the horn grounds through it's mounting bracket & bolt so make sure that's tight & rust free.
-you can test the horn itself by temporarily jumpering it's power terminal to the positive battery post.