What are the Horn Ring Cycler (HRC) and Horn Ring Cycler 2 (HRC2)?
With the Auxiliary Input connected and the Horn Ring Cycler (HRC) or Horn Ring Cycler 2 (HRC2) option selected, then the driver may scroll through wail, yelp and phaser tones by tapping the vehicles horn for “hands-free” control when the siren selector is in the Standby position. Pressing and holding the vehicles horn produces an Air Horn override tone without changing the basic tone selection.