1. Vehicles are equipped with high and low tone horns mounted behind the front bumper under the headlights. Signals are activated by a button either in the center of the steering wheel or one of the side buttons (on car parts). The horn relay is mounted under the front panel on the left side.
2. If there is no signal, check the fuse.
3. If the fuse is good, then disconnect the wire from one of the signals and connect the signal directly to the battery. If there is no signal, then either the signal is faulty or there is an open ground connection. Check the other signal in the same way.
4. If there is a signal when connected to the battery, then the signal relay is faulty. You should also check the contact of the ground connection on the steering column and the wires.