2009 Toyota Tundra Owners Manual - Page 560

5 -1 . Esse nt ia l inform a t ion Em e rge ncy fla she rs 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, push 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. 534