2010 Nissan Frontier Crew Cab Owner's Manual - Page 123

HORN The flashers will operate with the ignition switch placed in any position. Some state laws may prohibit the use of the hazard warning flasher switch while driving. CARGO LAMP SWITCH WIC1449 LIC0616 To sound the horn, push the area between the horn icons on the steering wheel. To turn on the cargo lamp, push the switch down to the ON position. WARNING Do not disassemble the horn. Doing so could affect proper operation of the supplemental front air bag system. Tampering with the supplemental front air bag system may result in serious personal injury. CAUTION Be sure to turn the light switch to the OFF position when you leave the vehicle for extended periods of time, otherwise the battery will go dead. Instruments and controls 2-31