trailer brake controller

I have a 2005 tacoma pre runner with tow package, i cant find what each wire is used for? anyone know?

 

do you have the one for the trailer brake connector in the cab too?

 

Assuming you’re talking about the controller itself
There’s a power/ hot wire, ground and a signal wire from the brakes. The output from the controller is variable voltage going to the 7 round plug in the back.
I can only speak for prodigy controllers but they sell a vehicle specific pigtail that plugs directly into the truck harness and then directly into the controller.

 

Here are the rest of the pages, should have what you need.