SPECIFICATIONS
Torque Specifications
DESCRIPTION AND OPERATION
Horn
Component Location
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
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.
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
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
REMOVAL AND INSTALLATION
Horn
Removal and Installation
- With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Section 100-02.
- 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).
- To install, reverse the removal procedure.
General Procedures, Removal and Installation
GENERAL PROCEDURES
Belt-Minder Deactivating/Activating
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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:
Frame and Mounting
Uni-Body, Subframe and Mounting System
SPECIFICATIONS
Torque Specifications
DESCRIPTION AND OPERATION
Subframe and Mounting Systems
The front subframe is bolted to the body and:
aids in structural support.
provides the mounting surface for the steering gear, the front
suspension lower arms, en ...
Safety Belts
PRINCIPLES OF OPERATION
WARNING: Never let a passenger hold a child on his or her lap
while your vehicle is moving. The passenger cannot protect the
child from injury in a crash.
WARNING: It is extremely dangerous to ride in a cargo area,
inside or outside of a vehicle. In a crash, people ridin ...
Vehicle storage
If you plan on storing your vehicle for an extended period of time
(30 days or more), read the following maintenance recommendations to
make sure your vehicle stays in good operating condition.
All motor vehicles and their components were engineered and tested for
reliable, regular driving. Lo ...
