Ford Taurus Service Manual: Horn

SPECIFICATIONS

Torque Specifications

Ford Taurus. Instrumentation and Warning Systems

DESCRIPTION AND OPERATION

Horn

Component Location

Ford Taurus. Instrumentation and Warning Systems

Ford Taurus. Instrumentation and Warning Systems

Overview

The horn emits an audible tone when the driver air bag module is pressed. The horn output is controlled by a relay, which is integral to the BCM.

System Operation

System Diagram

Ford Taurus. Instrumentation and Warning Systems

Horn Operation

The horn switch consists of 2 sets of contacts separated by springs. The lower set is connected to ground and the upper set is connected to the horn signal circuit.

When the driver air bag module is pressed, it pushes down on the upper set of contacts, collapsing the springs and allowing the contacts to touch. When the contacts touch, it completes the circuit and provides the ground signal which is routed through the clockspring, the SCCM and then to the horn relay, which is integral to the BCM.

The BCM supplies the control and switched (load) voltage to the horn relay. When energized, the horn relay provides voltage to the horn, enabling the horn to sound.

DIAGNOSIS AND TESTING

Horn

Symptom Chart

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Ford Taurus. Instrumentation and Warning Systems

Pinpoint Tests

Pinpoint Test A: The Horn Is Inoperative

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Normal Operation and Fault Conditions

REFER to Horn.

    Possible Sources
  • Fuse
  • Wiring, terminals or connectors
  • Steering wheel harness
  • Horn
  • Clockspring
  • Horn switch (part of the steering wheel)
  • BCM
  • SCCM

Visual Inspection and Diagnostic Pre-checks

Inspect the BCM fuse 22 (20A).

PINPOINT TEST A: THE HORN IS INOPERATIVE

Ford Taurus. Instrumentation and Warning Systems

Ford Taurus. Instrumentation and Warning Systems

Ford Taurus. Instrumentation and Warning Systems

Ford Taurus. Instrumentation and Warning Systems

Ford Taurus. Instrumentation and Warning Systems

Ford Taurus. Instrumentation and Warning Systems

Ford Taurus. Instrumentation and Warning Systems

Ford Taurus. Instrumentation and Warning Systems

Pinpoint Test B: The Horn Is Always On

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Normal Operation and Fault Conditions

REFER to Horn.

    Possible Sources
  • Wiring, terminals or connectors
  • Steering wheel harness
  • Clockspring
  • Horn switch (part of the steering wheel)
  • BCM
  • SCCM

PINPOINT TEST B: THE HORN IS ALWAYS ON

Ford Taurus. Instrumentation and Warning Systems

Ford Taurus. Instrumentation and Warning Systems

Ford Taurus. Instrumentation and Warning Systems

REMOVAL AND INSTALLATION

Horn

Ford Taurus. Instrumentation and Warning Systems

Ford Taurus. Instrumentation and Warning Systems

Removal and Installation

  1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Section 100-02.
  1. NOTE: The horn and bracket are installed as an assembly.

    Remove the bolt and the horn.

    • Disconnect the electrical connector.
    • To install, tighten to 12 Nm (106 lb-in).
  1. To install, reverse the removal procedure.
    General Procedures, Removal and Installation
    GENERAL PROCEDURES Belt-Minder Deactivating/Activating NOTE: If you are using MyKey, the Belt-Minder cannot be disabled. If the Belt-Minder has been previously disabled, it is re-enabled during ...

    Parking Aid - Audible
    SPECIFICATIONS General Specifications DESCRIPTION AND OPERATION Parking Aid Component Location Parking aid speaker PAM Parking aid sensors Overview The parking aid system sounds a warning to al ...

    Other materials:

    Child seat positioning
    WARNING: Airbags can kill or injure a child in a child seat. Never place a rear-facing child seat in front of an active airbag. If you must use a forward-facing child seat in the front seat, move the vehicle seat upon which the child seat is installed all the way back. When possible, all c ...

    Steering Column
    SPECIFICATIONS Torque Specifications DESCRIPTION AND OPERATION Steering Column The steering column system consists of the following components: Intermediate shaft Steering column SCCM (if equipped) Steering column switches Steering column tilt motor (if equipped) Steering wheel Selecto ...

    Removal
    Engine Special Tool(s) WARNING: Do not smoke, carry lighted tobacco or have an open flame of any type when working on or near any fuel-related component. Highly flammable mixtures are always present and may be ignited. Failure to follow these instructions may result in serious personal injury. ...