Dodge 2009 Ram 1500 - Manual (Page 408)

HAZARD WARNING FLASHER
The Hazard Warning flasher switch is mounted on the
top of the steering column. Press the switch to turn on the Hazard Warning
flasher. When the switch is activated, all directional
turn signals will flash on and off to warn oncoming
traffic of an emergency. Press the switch a second time to
turn off the Hazard Warning flasher.
This is an emergency warning system and should not be
used when the vehicle is in motion. Use it when your
vehicle is disabled and is creating a safety hazard for
other motorists.
When you must leave the vehicle to seek assistance, the
Hazard Warning flasher will continue to operate even
though the ignition switch is OFF.
NOTE: With extended use, the Hazard Warning flasher
may discharge your battery.
Hazard Warning Flasher Switch
406 WHAT TO DO IN EMERGENCIES