I am installing running board LED'S this weekend. Everything I see shows the tie in to be under the ridge plate at the passenger rear door. My question is does anyone know the wire color code to pick up the tie in to the interior dome lights? I have a 2017 XLT Crew Cab.
Thank you

 

Honestly, I couldn't find an answer to this either .I ran mine from my 3rd brake light ontop the cab, through the inside of the cab, along the door sills, lift up the driver side carpet there is a hole, and a grommet under the truck, pushed it through that .sealed it up with some silicone

 

If it wasn't 20 below out side ide go look lol. I wanna say it was purple or purple and white I think. It's been a while since instalation. I will say there is not much room to work in the sill yet alone solder. Save your self the head ache and just tap the power wire for the cargo lights, u need to run the power to both sides anyway.

 

https://www.f150forum.com/f118/wirin...solved-316165/https://www.f150forum.com/f118/addin...2017-a-389772/

 

Here's a video, but no mention of the wire colors.

 

http://www.bbbind.com/free_tsb.html