electric trailer brakes?

[Ont240]

wanting to install
electric brake controller.
found the red lead from engine bay
WHERE IS the front(starting point) for the blue lead located?
Your help is appreciated.

 

[briando]

you're gonna have to go to the manual for that man. i know when my chevy is pullin a grain wagon the last thing i want going thru my mind is whether or not i wired the brakes correctly.

 

[Ont240]

found a site like this most helpful.
http://www.etrailer.com/tv-brake-controller-2011-chevrolet-pickup.aspx