How to Wire a 7-Way connector on New and Old Body Style 2004 Ford F-150
Question:
We have a 2004 F-150 XLT. You refer to New and Old body styles. How do we know what ours is? Larry
asked by: Larry D
Expert Reply:
The way to tell if your truck is a new body style or a heritage model (old body style) is to check for the wiring harness at the rear of the vehicle on the driver side frame rail. you may have to lower the spare tire to see the harness if it is present.
If your truck is the New body style then you will need the Tow Package Vehicle Wiring Harness with 7-Way Trailer Connector, part number 118247, to wire a 7-way connector on your pickup. You will be able to find the wiring harness on the drivers side frame rail at the rear of the vehicle by lowering the spare tire. You will also have to install the supplied relay in the fuse panel that is located behind the passengers side kick panel.
If the truck you have is a F-150 Heritage model then the wiring for the 118247 wiring harness will not be located on the drivers side frame rail of your vehicle. You will need the 118344 wiring harness which will connect in line with the taillights and provide a 4-way trailer connector. Once you have this installed you will need the 4-way to 7-way connector. You connect the 4-way connector on the vehicle to the back of the adapter. This connection will supply stop, turn and taillights to your new 4-way and 7-way connector.
Then you must wire for the other functions you will need to power on your trailer. The blue wire will be ran to the electric brake controllers blue wire and the black wire will be ran to the battery or a fused terminal which supplies 12 volt power under your hood. After these connections are wired you have the auxiliary or reverse light wire left, which is yellow or orange, to wire if you need that circuit for your trailer, if this wire is not needed you can just tape it up out of the way.
Products Referenced in This Question
Tow Package Vehicle Wiring Harness with 7-Way Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- No Converter
- Custom Fit
- 7 Round - Blade
- Tekonsha
more information >
T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- No Converter
- Custom Fit
- 4 Flat
- Tekonsha
more information >
Product Page this Question was Asked From
Tow Package Vehicle Wiring Harness with 7-Way Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- No Converter
- Custom Fit
- 7 Round - Blade
- Tekonsha
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Shop: Trailer Wiring
- Search Results: trailer brake controller
- Search Results: tekonsha brake controller
- Search Results: 18136
- Search Results: 118247
- Q&A: How to Add a 7-Way Trailer Connector on a 2008 Ford F-150
- Q&A: Upgrading From A 4-pole to 7-pole Connector On A 2006 F150 Installation
- Q&A: Parts Needed to Install a 7-Way in a 2008 Ford F-150
- Q&A: Will Tow Package Vehicle Wiring Harness 118247 Work on a 2005 Ford F-150 XL?
- Q&A: Trailer Hitch, Wiring and Brake Controller Installation on 2004 Ford F-150 4.6L V8
- Shop: Replacement Mounting Bracket for Hopkins 7- and 4-Pole Trailer Connector Socket
- Shop: Adapter 4-Pole to 7-Pole and 4-Pole
- Shop: 7- and 4-Pole Trailer Connector Socket w/ Mounting Bracket - Vehicle End
- Shop: Mounting Bracket and Installation Hardware - Pollak 7-Pole, RV-Style Trailer Connector - Vehicle End
- Shop: No-Drill Mount for Electrical Mounting Bracket - Short
- Shop: Plug-N-Tow (R) Vehicle Wiring Harness
- Shop: No-Drill Mount Bracket, Long
- Video: Universal Kit for a Trailer Brake Controller Installation - 2013 Ford F-150
- Shop: Brake Controller
- Video: Trailer Brake Controller Installation - 2009 Ford F-150 22292
- Video: Trailer Wiring Harness Adapter Installation - 2013 Ford F-150
- Video: Trailer Wiring Harness Adapter Installation - 2011 Ford F-150
- Video: Hopkins 7- and 4-Pole Trailer Connector Socket Installation - 2020 Chevrolet Silverado 1500
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Search Results: 44649
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Video: Choosing the Right Trailer Wiring
- Shop: Trailer Hitch
- Article: Trailer Wiring Diagrams
- Search Results: 68149
on Custom Fit Vehicle Wiring
