The Horn is part of the car Electrics system. We have 2 associated problem symptoms connected to it.
We also have 160 owner problems that mention it.
Replace fuse for faulty cigarette lighter Ford Focus
Driver air bag light on all the time Nissan Pixo
Multiple electrical issues Vauxhall Astra
Horn not working Peugeot 1007
Horn stoped working Mitsubishi Carisma
Lights on without switching on,no horn,indicators dont work, Citroen Xsara Picasso
Horn not working Peugeot 607
Electrical Vauxhall Vivaro
Complete electrics failure Vauxhall Combo
Horn needs replaced Peugeot Partner