Aux switch illumination

Hey all, I’m adding a couple auxiliary switches, and I would like to tap them to illuminate with the factory switches. Is there a fuse you guys have used to tap power off of? Or a wire on a factory switches? This is on a 2018 sr5.

 

I've done this several times in a few different vehicles by just tapping into the illumination wire on an adjacent switch. I'm not sure the color of the wire is consistent across all years, models, or even switches in the same truck so I've always tested with a multimeter to be sure.
Not sure exactly what they're called ('T-tap' maybe?), but I've used those little plastic taps that clip onto the existing wire and your new wire to feed the new switch.

 

Tap off of an adjacent switch. As mentioned, wiring color does change across the years. The 2020 has alot of changes from the previous years. Search the forum for the "Ultimate wiring diagram" thread to verify your wiring color.

 

Ultimate TUNDRA Wiring Diagrams Collection | Toyota Tundra Forum

Your SR5 may have some unused sockets behind the dash, I'd tap off one of those.

You'll need to use the pos and neg of the circuit, they don't use a common ground.





I hooked up some LED console lights so they would dim with the dash lights.