The Horn

The Electrical System:
Horn

An electric horn is an indispensable part of every modern automobile, but they have not always been standard equipment. In fact, electric horns did not become popular until about 1915. At that time, they were called the Klaxon (from the Latin word Klaxo for Shreik or scream). On many roads, road signs encouraged motorists to honk their Klaxon when cresting hills or rounding curves to alert other travelers.

Today’s horn relies on an electromagnet to cause a diaphragm in the horn assembly to vibrate. When you press on the horn it closes the horn switch and activates the horn relay and completes the electrical circuit. When electricity passes through the electromagnet, it pulls on an armature that is attached to the diaphragm until another set of electrical points are activated that allow the diaphragm to return to their original position.

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1. Electrical System
2. The Battery
3. The Starter
4. The Alternator
5. The Voltage Regulator
6. Lighting
7. Lighting System Basics
8. Interior Lights
9. Voltage
10. Turn Signals and Hazard Lights
11. The Horn
12. Windshield Wipers
13. The Defroster
14. Electrical Symbols
15. Types Of Electrical Circuits
16. Electrical Circuit Defects
17. Introduction To Automotive Batteries
18. Battery Construction
19. Battery Operation
20. Specific Gravity
21. Voltage And Capacity
22. Battery Ratings
23. Testing Automotive Batteries
24. Preventive Maintenance Of Batteries
25. Optical Battery & Antifreeze Tester
26. Measuring Specific Gravity With The Optical Battery Tester

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