Troubleshooting Trailer Brake Staying Engaged On 2010 Ford F-150 Platinum with Factory Trailer Brake

Question:

hey im needing help on a 2010 f150 Platinum with factory trailer brake , my trailer brakes and all lights work fine on my sons 2000 gmc sierra 1500 with trailer brake controller we bought from yall a few years ago .. all the lights on the Ford are working fine just dragging the brakes , set controller to minium but still enguaged all the time , i diddnt if the Ford plug is wired a little diffrent or am i overlooking something obvious... thanks for any ideas

asked by: Keith B

Helpful Expert Reply:

For your 2010 Ford F-150 Platinum with factory integrated brake controller, the first thing I recommend checking since the trailer works well on your 2000 GMC 1500 is the trailer connection itself. I recommend cleaning the pins using some sand paper or steel wool as sometimes there is an issue with corrosion causing a power jump from one pin to another. If you are getting constant braking, there is power getting to the trailer brakes even when you are not hitting the brake pedal or manual override on the controller. I recommend testing the 5 o'clock pin on your truck when the trailer is not connected using a circuit tester like # PTW2993. If you are getting a bright light without hitting the brake or manual override lever then you will need to trace that wire to find where the power is coming from.

Ford did use a different pin out between 2009 and 2011 for their wiring harness. I've attached an article to assist.

expert reply by: Jason S