As you explore the game you will see black levers with yellow lights on them. This guide on How To Use & Interact With Lever Switches With Yellow Light In LEGO Bricktales will tell you what you need to unlock in order to be able to use these switches that appear in every world in the game.
When you are exploring the different worlds of LEGO Brick Tales you will encounter several devices that you are unable to use. There are on every world, hiding secrets and special locations that you must return to if you want to visit. These include the shimmering blue bricks and also these special contraptions that have a lever switch on them and a yellow light.
How To Use & Interact With Lever Switches With Yellow Light In LEGO Bricktales
Before you’re able to use any of these yellow light levers, you first need to reach the City world. This is the 4th world in the game, after you complete the Medieval world. Once you arrive at the City you’ll need to do a few builds but eventually, you will gain access to the Power Station.
Inside the Power Station, you will get a new ability for Rust, an electric ability. You can then use that ability wherever you find the yellow light switches to be teleported to another device nearby. This unlocks many secret areas for more animals, treasures, and locations to explore.