Title: Test horn circuit relays, horns, switches, connectors, wires, clock springs, and control components/modules.
Course: Diesel Equipment Technology II (20107-II) > Section: Electrical/Electronic Systems: Servicing Related Electrical Systems

Testing should include

- demonstrating the proper horn function
- testing the horn switch, relay, wiring, clock spring, power, and ground
- referring to service materials and following manufacturer guidelines.

Process/Skill Questions:

- Why would a horn operate only with certain steering wheel positions?
- What mechanical or electrical issue would cause the horn to sound continuously?