2011 Ford F-150 Does Not Recognize when a Trailer Is Connected and Trailer Brakes Do Not Work
Question:
I have a 18 foot tandam trailer with brakes, my 7 blade connector male/female to my 2011 F150 eco boost truck, its not 4X4, my electric brakes to my trailer do not want to work, ford has a app on truck and every time I connect its says trailer not connectedinch Fuse box is complicated, tried to run down fuse, bad plug? Ive cleaned contacts, etc any advice? Ill check with tester12V again .
asked by: Read K
Expert Reply:
There could be a couple of different issues. First, make sure that the wire that leads from the trailer side 7-Way to the trailer brakes is located in the 7:00 position if looking at the face of the connector. If not, then that could be why the vehicle is not recognizing that a trailer is connected.
There could also be a bad ground somewhere. I would start on the trailer and make sure that the main ground and the brake magnet grounds are attached to clean and corrosion free bare metal surfaces. Make sure that no wires are exposed and touching metal on the trailer frame for the brake magnet ground and power wires.
Finally, you can further test the magnets. I have included a link to an FAQ article that explains how to test the magnets.

Product Page this Question was Asked From
Pollak Black Plastic, 7-Pole, RV Blade-Style Trailer Socket - Vehicle End
- Trailer Wiring
- Trailer Connectors
- Vehicle End Connector
- Plug Only
- 7 Round - Blade
- Pollak
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Search Results: diode
- Shop: Roadmaster Hy-Power Diodes (Qty 2)
- Shop: Roadmaster Hy-Power Diode - (Qty 1)
- Shop: Curt Trailer Hitch Receiver - Custom Fit - Class II - 1-1/4"
- Shop: Tail Light Isolating Diodes (Qty 4)
- Shop: 2-to-3 Tail Light Converter for Towed Vehicles w/ Incandescent Tail Lights
- Shop: Curt Trailer Hitch Receiver - Custom Fit - Class II - 1-1/4"
- Shop: CIPA Custom Towing Mirrors - Slip On - Driver Side and Passenger Side
- Search Results: 2057514
- Q&A: How To Reset An iRV36 RV Stereo System
- Video: Comprehensive Review: CIPA Custom Towing Mirrors
- Q&A: Recommended Towing Mirrors For A 2014 Ford F-150 Lariat Edition
- Q&A: Will CIPA Slide-On Towing Mirror # CM11800 Fit 2012 Ford F-150
- Q&A: Fuse and Relay Locations for 12 Volt Power on a 2011 F150 with Tow Package
- Q&A: Troubleshooting Curt TruTrack Not Leveling Truck After Installation and Maximum Adjustment
- Q&A: Troubleshooting Intermittent Trailer Disconnected Message with Factory Brake Controller on Ford
- Article: Trailer Wiring Diagrams
- Article: 5 Things to Know About Weight Distribution Hitches
- Video: Trailer Wiring Harness Installation - 2006 Ford F-350 HM40975
- Q&A: Trailer Stop and Turn Relay and Fuse Locations on a 2011 Ford F-150
- Search Results: trailer hitch
- Video: Finding the Right Trailer Wiring Harness
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Video: Curt T-Connector Vehicle Wiring Harness Review C56040
- Search Results: trailer wiring
- Article: How to Choose the Right Trailer Hitch Class
- Search Results: trailer tires and wheels
- Video: How to Choose a Trailer Brake Controller
- Search Results: trailer hitch ball mount
- Video: Feature Breakdown: Universal Installation Kit for Trailer Brake Controller