Ford Fiesta: Horn / Horn - System Operation and Component Description. Description and Operation
Ford Fiesta 2014 - 2019 Service Manual / Instrumentation and Warning Systems / Horn / Horn - System Operation and Component Description. Description and Operation
System Operation
System Diagram
| Item | Description |
|---|---|
| 1 | Horn |
| 2 | Driver Airbag |
| 3 | Horn Switch |
| 4 | Clockspring |
| 5 | BCM |
Horn Operation
The horn switch consists of a set of contacts separated by springs. One side is connected to ground and the other side is connected to the horn signal circuit. When the driver airbag is pressed, it pushes down on the switch, collapsing the springs and allowing the contacts to touch. When the contacts touch, it closes the circuit through the clockspring to the BCM , and provides a ground signal to the BCM . The BCM then provides voltage to the horn, enabling the horn to sound.
Horn. Diagnosis and Testing
DTC Chart(s)
DTC Chart: Horn
Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods (100-00 General Information, Description and Operation)...
Other information:
Ford Fiesta 2014 - 2019 Service Manual: Instrument Panel Center Upper Trim Panel. Removal and Installation
Special Tool(s) / General Equipment Interior Trim Remover Removal NOTE: Instrument panel center upper trim panel with 6.5 inch screen shown, 4.2 inch screen similar. Release the clips and remove the instrument panel center upper trim panel...
Ford Fiesta 2014 - 2019 Service Manual: Brake Disc Machining. General Procedures
Repair WARNING: Service actions on vehicles equipped with electronic parking brakes may cause unexpected parking brake application, which could result in injury to hands or fingers. Put the electronic parking brake system into service mode prior to servicing or removing rear brake components...
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Wheels and Tires. Diagnosis and Testing
Preliminary Inspection
Verify the customer concern by carrying out a road test on a smooth road. If any vibrations are apparent, Refer to the Symptom Chart: NVH.To maximize tire performance, inspect for signs of incorrect inflation and uneven wear, which may indicate a need for balancing, rotation or front suspension alignment.
Correct tire pressure and driving techniques have an important influence on tire life. Heavy cornering, excessively rapid acceleration and unnecessary sharp braking increase tire wear.
Correct tire pressure and driving techniques have an important influence on tire life. Heavy cornering, exce
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