HORNS

Description 5550B

1.2 8v, 1.3 Multijet, 1.4 16v

COMPOSITION

The electromagnetic horn is secured to a steel bracket, and is located in the left-hand front part of the engine compartment, behind the bumper.

The activation signal is given by pressing the centre cover of the steering wheel near the spokes.

View of the horn unit.

1. Fastening bracket

2. Horn

3. Connector

The electromechanical horn has the following specifications:

• rated voltage: 12V
• current uptake: <= 6 A
• sound level: 105 - 118 dB/A
• frequency: 400 ± 20 Hz

OPERATION

The pressure exerted on the centre cover of the steering wheel, compresses one of three springs, located in the rear part of the AirBag module, which closes the circuit to earth via a copper contact.

View of the horn control circuit

1. Horn connection on Airbag module

2. Spring

3. Contact

4. Electric circuit

The three springs form part of a printed circuit that terminates with a two-way connection; it is located on the lower panel of the Air Bag module.

The connection to the system, made by the clock spring, allows the steering wheel to rotate and ensures the correct transmission of the various signals without the aid of sliding contacts.

A. Horn connection on clock spring

B. Clock spring

C. Connection on steering wheel interface

Pin 7: Horn earth

Pin 8: Horn