On my 2016 RB25RS there are two switches on the inside left of the front storage compartment. One is for the LED lights and the other is for the lights mounted on the lower front of the cap used to light up the tongue area during night time hookup. There is also a light on the inside right side of the compartment.
As others stated, the LED's don't last. Need to replace mine.
2014 Sunset Trail Reserve ST25RB
2013 Toyota Tundra Crewmax Platinum 5.7 Tow Package