Horns

Description 5550B

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 assembly

1 - 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 circuit

A - 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.