Horn: Description and Operation

HORN SYSTEM
The horn system consists of an electronic horn, two driver controlled horn switches in the steering wheel, a switch internal to the RKE module controlled by a hand held transmitter, and the interconnecting wiring. The steering wheel switch activated horn system is designed to provide the driver with an audible warning to signal pedestrians, other drivers, etc. The hand held transmitter activated horn system is designed to provide the driver with an audible confirmation when the LOCK button is pressed twice on the transmitter (if programmed).

CIRCUIT DESCRIPTION
Battery is provided to the horn at all times from the HORN fuse in the UHJB through circuit 1540A. Ground is provided at all times through circuits 150HH, 150Z, and the left forward lamp ground. Circuit 28/28AA carries battery at all times from the horn to the steering wheel horn switches and the RKE module. Circuit 28 is grounded when LOCK button is pressed twice on the RKE transmitter, or one or both of the steering wheel horn switches is pressed. This provides a signal to a circuit board inside the horn. The circuit board then switches battery from circuit 1540A to the internal horn coil, causing the horn to sound.

COMPONENTS
Horn Assembly and Bracket
The horn operates over a battery input range of 9-14V at -25°C (-13°F) to 10-15 V at 75°C (167°F).
Sound Level: 95dB (measure at 2 meters in front of vehicle)
Frequency: 380 Hz-420 Hz
Musical Note: G-G# (sharp)
Operation Range: 9-14 VDC at -25 degrees C (-13 degrees F) 10-15 VDC at 75 degrees C (167 degrees F)