Horn and key buzzer not working

[sebastien]

Hi Guys, everything was working fine on my 68 but I noticed the other day that my horn and my key buzzer did not work anymore.
Any ideas where I should start looking?
Wires are connected properly on the horn and on the horn relay.Fuse is ok.
thanks

[69Z28]

If you have access to another relay switch it out to confirm if it's a bad relay or not.

[69pace]

both trigger based on grounds that often go bad and require clean ups.