Adding a 7-Way and Brake Controller to a 2015 Ford Expedition with Factory 4-Way
Published 10/24/2016
Products Featured in This Question
Question:
I am considering the purchase of a 2015 Ford Expedition XLT with a Factory 4 pin connector. I will be using it to tow a lightweight travel trailer so I need to convert to 7 pin and add a TBC. I have read that Ford includes a 7 wire harness on all units from the factory with TBC connector under the dash and all I have to do is wire in this adapter along the rail. Do you know if this is accurate? Any help you can provide would be appreciated.
asked by: Ed S
Expert Reply:
From what we have found the 2015 Ford Expedition that came with a factory 4-Way connector will need a little bit of hardwiring to install a brake controller and 7-Way connector. You will need # 37185, some wire (more on that later), a brake controller, and a brake controller wiring harness.
The 37185 will plug into the 4-Way. Then you will ground the white wire to the frame. That will leave a blue wire, black wire, and purple wire. The purple wire is for reverse lights so if the trailer does not have them you will not have to tap that purple wire into a reverse light on the vehicle.
The black wire is for a 12 volt hot lead. If the trailer doesn't have anything on it that requires a 12 volt circuit you don't have to use this wire. Otherwise it will connect to the positive battery terminal via a 40 amp circuit breaker # PK54540.
The blue wire is going to have to be manually run to the brake controller. Basically, you will remove the blue wire from the end of harness # 22292 that plugs into the vehicle and attach it to the wire you run manually. What I recommend is to wire both the black wire hot lead mentioned earlier and the blue wire for the brake controller using duplex wire # 10-2-1 sold by the foot. I recommend about 25 feet of this wire.
Then all you will need is the brake controller. I recommend the P2 # 90885 because it is easy to set up and use and it is reliable. I have included some links that will help with this installation. Not all of the parts of these links pertain to your vehicle so just follow the parts that are relevant to your installation.
Product Page this Question was Asked From
Adapter 4 Pole to 7 Pole and 4 Pole w/Test Lamps
- Custom Fit Vehicle Wiring
- Wiring Adapters
- Universal Fit
- 4 Flat to 4 Flat
- 4 Flat to 7 Blade
- Plug and Lead
- CURT
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Search Results: 4 pin to 7 pin
- Search Results: 154r
- Video: The Low-Down on the Curt T-Connector Vehicle Wiring Harness for Factory Tow Package-C55384
- Video: Hands-On with the Adapter 4 Pole to 7 Pole and 4 Pole w/Test Lamps
- Search Results: brake battery
- Search Results: battery
- Shop: Trailer Wiring
- Shop: Vehicle Tow Bar Wiring
- Shop: Replacement 12V 5 Ah Battery for Bright Way Trailer Breakaway Kits
- Shop: Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector
- Shop: Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector
- Shop: Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 7-Way and 4-Pole Flat Connectors
- Shop: Demco Trailer Connector Adapter - 6-Way - 7' Cord
- Shop: Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Shop: Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 5-Pole Flat Trailer Connector
- Q&A: Can I Use a 4 Way Vehicle Connector with 7 Way Adapter and the Curt Echo Brake Controller?
- Shop: Brake Controller
- Video: A Closer Look at the Peterson Clearance and Side Marker Light
- Video: LED Trailer Fender Light Review
- Shop: Trailer Hitch
- Article: Trailer Wiring Diagrams
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Search Results: trailer hitch
- Video: An In-Depth Look at the Roadmaster Battery Charge Line Kit for Towed Vehicles
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Q&A: Lug Nut Torque Chart for Trailer Wheels
- Search Results: trailer wiring
- Video: How to Choose a Trailer Brake Controller
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Search Results: trailer tires and wheels
on Custom Fit Vehicle Wiring
