The present invention provides a horn circuit (15) for activating a horn of a vehicle which is adapted to be integrated in an airbag module (3) of a vehicle or in an attachment member (5) for connecting the airbag module (3) to the steering wheel, comprising at least two contact elements (17, 19), wherein a horn signal is produced when the at least two contact elements (17, 19) electrically contact with each other. The horn circuit (15) according to the present invention is characterised in that the at least two contact elements (17, 19) are adapted to electrically connect with each other by means of at least one conductive spring element (9) for fixing an airbag module (3) to a steering wheel.