Ford Explorer: Horn / Description and Operation - Horn - System Operation and Component Description

Ford Explorer 2020-2022 Service Manual / Electrical / Instrumentation and Warning Systems / Horn / Description and Operation - Horn - System Operation and Component Description

System Operation

System Diagram


Item Description
1 Clockspring
2 Horn Switch
3 SCCM
4 BCM
5 BCMC
6 Horn

Horn Operation

The horn switch uses 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 airbag 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 a ground signal through the clockspring to the BCM horn input. The BCM then grounds the integrated horn relay coil in the BCM-C to energize the non-serviceable relay. When energized, the horn relay provides voltage to the horn, enabling the horn to sound.

    Description and Operation - Horn - Component Location

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    Diagnosis and Testing - Horn

    Diagnostic Trouble Code (DTC) Chart Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods (100-00 General Informati..

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    Special Tool(s) / General Equipment Two Leg Puller Removal NOTE: RH shown, LH similar. Remove windshield wiper pivot arm nut cover. Remove windshield wiper pivot arm nut. Remove the wiper pivot arm...

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    Categories

    Driver and Passenger Airbags

    WARNING: Do not place your arms on the airbag cover or through the steering wheel. Failure to follow this instruction could result in personal injury.

    WARNING: Keep the areas in front of the airbags free from obstruction. Do not affix anything to or over the airbag covers. Objects could become projectiles during airbag deployment or in a sudden stop. Failure to follow this instruction could result in personal injury or death.

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

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