Havine hard time hooking up brake controller on a 2001 f-250,cant find blue wire under dash. Where are the wires located for controller.

 

You 'should' have a controller adapter cable that was in the glove box packet when new.. If not, they can be had from Ford.. If you remove the lower access panel below the steering column, the controller cable plugs in 'up high' in the 'right upper' corner towards the radio/heater controls (grouped connectors) forward of the dash bracket (steel)..You'll see some grounds attached as well..The cable plugs there..

......................HP......................

 

Thanks for the info