2750967 - 5550B horns

The diagram below shows a view of the assembly.1 - Horn 2 - Engine wiring box 3 - Facia Node 4 - Stalk unit The electromagnetic horn is secured to a steel bracket and positioned in the central upper part of the vehicle behind the front grille.The activation signal is given by pressing the centre section of the steering wheel by the spokes. View of horn assembly1 - Bracket 2 - Horn 3 - Connector

The specifications of the electromagnetic horn are as follows:

• rated voltage: 13V
• current uptake: <= 6 A
• sound level: 110 - 118 dB/A
• frequency: 420 ± 40 Hz.

When pressure is exercised on the covering in the middle of the steering wheel, one of the three springs in the rear of the air bag module is pressed and the circuit is closed to earth.View of horn control circuitA - Horn connection on clockspring B - Horn connection on airbag module C - Spring D110 - Connection on clockspring D110 - pin 7: Horn earth D110 - pin 8: Horn The three springs form part of a printed circuit, located on the lower airbag module partition which ends with a two-way connection.The connection to the system, via the clock spring, allows the rotation of the steering wheel, ensuring the correct transmission of the various signals, without the aid of sliding contacts.