2011 Toyota Tundra Regular Cab Owners Manual - Page 612
2011 Toyota Tundra Regular Cab Manual
Page 612 highlights
5-1. Essential information Emergency flashers Use the emergency flashers if the vehicle malfunctions or is involved in an accident. Press the switch to flash all the turn signal lights. To turn them off, press the switch once again. NOTICE n To prevent battery discharge Do not leave the emergency flashers on longer than necessary when the engine is not running. 588