Installing a Trailer Wiring Harness on a 2012 Ford Focus
Products Featured in This Question
Question:
Im confuse on the wire on the tail light can you please help me
asked by: Renny
Expert Reply:
It depends on what wiring harness you are using on your 2012 Ford Focus. If you are using a hardwire harness where you have to find and splice in the wires from the harness to the tail light wiring on the vehicle, you will need to use a circuit tester to find the correct wires on the vehicle.
If you do not have a circuit tester you can use # PTW2993. Have someone sit in the vehicle and go through the lighting functions; turn signals, running lights, and brake lights, while you test the wires behind each taillight.
The yellow wire on the harness is for left turn signal. Brown is for running lights, red is for brake lights. And green will be right turn signal.
Or, if you do not already have a harness you can install one that just plugs in line with the vehicle tail light wiring. For a hatchback use # 118549 and for a sedan use # 118548. I have linked a video for the hatchback harness and instructions for both harnesses. No cutting and splicing or testing to find the correct wires.
These harnesses do require a direct battery connection to power the trailer lights and isolate the power from the vehicle for protection so I have also included a link to an FAQ article with tips on routing the power wire.
Product Page this Question was Asked From
16 Gauge, 4 Conductor Bonded Parallel Wire - Per Foot
- Wiring
- Wire
- Bonded Wire
- 4 Wire
- 16 Gauge
- Deka
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Shop: Trailer Wiring
- Video: Set up: T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector on a 2012 Ford Focus
- Shop: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Shop: T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Shop: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Shop: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Shop: Curt Drawbar for 1-1/4" Hitches - 5-3/8" Rise, 6" Drop - 5-9/16" Long - 2K
- Video: Best 2012 Ford Focus Flat Tow Set Up Options
- Shop: Trailer Hitch
- Shop: Vehicle Tow Bar Wiring
- Search Results: trailer hitch
- Video: Finding the Right Trailer Wiring Harness
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Shop: Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Shop: Roadmaster 4-Diode Universal Wiring Kit for Towed Vehicles - 7-Way to 6-Way Coiled Adapter Cord
- Shop: Base Plate for Tow Bar
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Article: Trailer Wiring Diagrams
- Video: An In-Depth Look at the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit
- Search Results: trailer wiring
- Shop: Brake Controller
- Q&A: Will the Roadmaster Crossbar-Style Base Plate Kit Work with My Roadmaster Stowmaster Tow Bars?
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Video: An In-Depth Look at the Roadmaster Battery Charge Line Kit for Towed Vehicles
- Search Results: base plate for tow bar
- Shop: Vehicle Tow Bar Brake System
- Q&A: Choosing Between the Brake Buddy Select 3 and the Blue Ox Patriot Supplemental Braking System
- Article: How to Measure for Trailer Hitch Drop
- Video: Choosing the Right Tow Bar Wiring
on Wiring
