Recently, my horn stopped working. It is a Wolo horn that uses a relay.

After checking all the wiring and the fuses, I used a meter to check the relay poles and found one was not registering.

I replaced the relay and all is good.

I thought I'd post this so that anyone using a relay on anything on their bike, make sure that as part of your checking process, you also look at the relay which may have gone bad.