2001 E350 superduty extended van. Taking the family camping next week and have to wire the brake for the trailer....
The standard Ford brake controler connecter is there under the dash, but only a four wire harness is going to the back. The blue wire (brake feed) is there under the dash... where do I find it outside to run it to the back?

 

Take a look under the rear of the van again. Check for a bundle of wires wrapped in tape. If still nothing then I dunno...