Tekonsha 118574 T-One Harness w/ ModuLite | Ford Fusion
Tekonsha 118574 T-One Harness w/ ModuLite | Ford Fusion — Product description
Towing a small trailer behind your 2013 Ford Fusion? The Tekonsha 118574 T-One harness plugs straight into the factory wiring, no cutting or splicing, and its circuit-protected ModuLite module pulls trailer-light power from the battery so your car's electrics stay safe. You end up with a clean 4-flat connector ready for lights.
If you tow anything behind a 2013 Ford Fusion, a small utility trailer, a light boat trailer, or a bike rack that needs lights, the Tekonsha 118574 is the wiring you want. It's a T-One connector assembly, which means it's built to plug into the factory harness on that specific car. No cutting the loom, no splicing into taillight wires, no guessing which wire does what.
What sets this one apart from a plain T-connector is the ModuLite module. Instead of pulling all the trailer's lighting current back through your car's wiring, the ModuLite draws power straight from a direct battery connection and uses the vehicle's signals only to tell the trailer lights when to turn on. That keeps the load off the Fusion's factory circuits. The upgraded version adds circuit protection, so a short in the trailer harness or a corroded connector won't take out anything on the car side.
Installation is about as clean as trailer wiring gets. You find the factory connectors behind the trim, plug the T-One in line, ground the module, and route the 4-flat out to the hitch. Most folks have it done in well under an hour with basic hand tools. Because it's a vehicle-specific fit, you're not left splicing and taping in the dark, and you're not drilling into anything you'll regret later.
One thing to be clear about. This harness is matched to the 2013 Ford Fusion. If you're towing with a different year or a different vehicle, check the fitment with us first so you get the right T-One for your car. And if your trailer runs electric brakes, know that this connector handles lights only. You'd pair it with a separate brake control for the braking side. But for running lights, turn signals, and stop lights on a light trailer, it's exactly the right piece, and it does the job without touching the reliability of your factory wiring.
Key Features
- T-One vehicle-specific connector plugs into the 2013 Ford Fusion factory wiring, no cutting or splicing
- Circuit-protected ModuLite module draws trailer-light power from a direct battery feed, keeping the load off the car's factory circuits
- Upgraded circuit protection guards the vehicle side against shorts and overloads in the trailer harness
- Outputs a standard 4-flat trailer connector for running lights, turn signals, and stop lights
- Uses the vehicle's lighting signals to switch the trailer lights, so factory bulbs and warnings keep working normally
- Installs in under an hour with basic hand tools
Why Buy from NVN Marine
- Authorized Tekonsha reseller, full manufacturer warranty
- NMEA member and ABYC certified, advice from real boat techs
- Same-day shipping before 3 PM ET on in-stock items
- NY headquarters and Fort Lauderdale flagship retail store
Technical specifications
| Title | Tekonsha T-One Connector Assembly with Circuit Protected ModuLite Module |
|---|---|
| Brand | Tekonsha |
| Manufacturer Part Number | 118574 |
| UPC | 016118120745 |
| Vehicle Fitment | 2013 Ford Fusion |
| Connector Type | 4-Way Flat Trailer Connector |
| Converter Module | Circuit Protected ModuLite |
| Product Line | T-One Vehicle Wiring Harness |
| Keystone VCPN | T1M118574 |
Frequently asked questions
What vehicle does the Tekonsha 118574 fit?
It's a T-One connector built specifically for the 2013 Ford Fusion. If you're on a different year or a different vehicle, check with us first so you get the matching harness.
Do I have to cut or splice into my car's wiring?
No. The T-One plugs straight into the factory connectors behind the trim. You ground the module and route the 4-flat to the hitch, and that's it. No cutting the loom or splicing taillight wires.
What does the ModuLite module actually do?
It's a powered converter. Instead of running all the trailer's lighting current back through your car's wiring, the ModuLite pulls power from a direct battery connection and uses the vehicle's signals only to switch the trailer lights. That keeps the load off your factory circuits, and the upgraded version adds circuit protection against shorts.
What connector do I get at the trailer end?
A standard 4-flat trailer connector. That covers running lights, turn signals, and stop lights on a light trailer.
Does this control trailer brakes?
No, this is a lighting harness only. If your trailer has electric brakes, you'd add a separate brake control for the braking side.
Will it trip my car's bulb-out or warning lights?
It shouldn't. Because the ModuLite runs the trailer lights off its own battery feed and only taps the vehicle's signals, your factory bulb monitoring keeps working the way it should.
