System Operation

INTRODUCTION
Following are general descriptions of the major components in the factory-installed horn systems.

SYSTEM OPERATION
Horn Relay
The horn relay is a electromechanical device that switches current to the horn when the horn switch on the steering wheel is depressed.
The horn relay is located in the relay and flasher module. The relay and flasher module is mounted to a bracket that is secured to the cowl side inner panel behind the right end of the instrument panel. The relay and flasher module is accessed by removing the glove box bin.
If a problem is encountered with a continuously sounding horn, it can usually be quickly resolved by removing the horn relay from the PDC until further diagnosis is completed. The horn relay cannot be repaired and, if faulty, it must be replaced.

Horn Switch
Two horn switches are installed in the steering wheel, one on each side of the center-mounted driver airbag module. When either switch is depressed, the switch completes a circuit to ground for the coil side of the horn relay The steering wheel and steering column must be properly grounded for the horn switches to function.
The horn switches are serviced only as a set with their wiring. If either switch should fail, both switches must be replaced.

Horn
The standard single, low-note, electromagnetic diaphragm-type horn is secured to the Anti-Lock Brake System (ABS) access plate located behind the outer fender extension panel under the left headlamp. The horn is grounded to the access plate and receives a battery feed through the closed contacts of the horn relay
If the vehicle is equipped with a dual horn option, a high-note electromagnetic diaphragm-type horn is connected in parallel with, and mounted next to the standard low-note horn on the ABS access plate.
The horns cannot be repaired or adjusted and, if faulty or damaged, they must be replaced.