Bad earth maybe

[Bec1182]

Hi, just had a cam package and over radiator fitted today. Went out tonight and put my high beam on, and the horn sounds. I believe this may be a bad earth. Where do I start looking for the bad earth

 

[gunsmoke]

Impossible to answer really. Look for a single wire that looks like it/they have been removed?? Esp around horn and lights.
Take it back to the installers and ask them for help. Sorry I am not much help.