3rd brake lamp

Hello all,

I recently installed a bed rack and RTT, and it completely covers my 3rd brake lamp. I'm looking to install a new 3rd brake lamp onto the rear of my bed rack and was wondering if anyone knew which wire(s) to tap into? i saw a video of someone taking off the tail light and there was only one set of cables that went into the tail light, opposed to my previous tacoma which had 3 sets. i know it's only one due to the tail lights being fully LED, but i just don't know which ones to tap into.

thank you in advanced!

 

Have you looked at the Diode Dynamics 3rd brake light that goes into the hitch, if you don't need to install a new 3rd brake light.

https://www.diodedynamics.com/hitchmount-led-pod-reverse-kit.html