2012 Fiesta Zetec horn keeps randomly going off

[Sara]

Has anyone heard of a problem with last year model Fiesta Zetec where the horn and lights go off randomly? It happens when the car is parked anytime during the day...middle of the night and once when driving.

Ford service centre ask me to leave the car with them for three days so they can diagnose, but if anyone can help me I can ask them to check it. Any ideas would be really appreciated. Thanks