4-Way Wiring Harness for 2015 Ford Flex
Updated 10/22/2025 | Published 03/26/2025
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Question:
Hello, I’m looking at wire harnesses for a 2015 flex. Our car came from the factory with the factory tow package. Before we bought the car however someone has messed with the factory wiring and so the tow harness does not function. Can I just buy a plug and play harness such as the tekonsha or do I have to have one with the converter and what is the purpose of the converter if I can simply buy a plug and play one that will function properly? Thank you
asked by: Brandon M
Expert Reply:
Hey Brandon! You can use the T-One Vehicle Wiring Harness # 118472 on your Ford Flex. If Tekonsha thought a converter was necessary they would have added it to this wiring harness like they have on many others. The converter pulls power from the vehicle battery to keep the power draw off of your tail light circuits.
If you would rather have the extra protection and don't mind running the wire to your battery you can certainly use the Curt # C56343. Both will work even though you have the factory tow package. If you need anything else feel free to reach out in the comments below.
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Robin H.
10/22/2025
Hey Brandon, how did things go with the T-One wiring harness on your Flex? Did it get your trailer lights working again? Your update could make it easier for the next person dealing with a factory tow package issue.