I am installing a trailor brake controller I do not have to pakage what is a good place to pull power from is there anything switched with easy added somthingthat will only have power when the truck is on and where should I ground it thanks

 

Also any one know what wire to connect to at the brake peddle wire harness thanks

 

Any one know I don't have a multimeter all I need to know is what wire on the harness the clips to the brake peddle sensor has power when the peddle is pushed I figured the rest of it out thanks