It has dial horns which are found just before the radiator and are accessed by the use of the grille beneath the nosepiece of the car. First of all, to remove the horn, remove the radiator grille under the front bumper by removing the sheet metal screws attaching it. Once the grille is off, unconnection of two bullet wiring connectors at the horn, taking care of their color-coding. The second step is to unscrew the one bolt holding the horn to the radiator support metal and disassemble the horn. Calibrate the horn by reading the amperage at 12 volts which entails wiring an ammeter and voltmeter to the system connected to a source of power at 12 volts. Connect ammeter and voltmeter, rotate adjusting screw at the back of the horn till the current flow hits 3.0 + or -0.5 amperes at 12 volts, and be sure to firmly screw the lock nut at the back of the adjusting screw after adjustment. Lastly, once you have adjusted all the horns individually, tone them by using them in pairs.