Tekonsha 118464 T-One 4-Way Flat Wiring Harness
Tekonsha 118464 T-One 4-Way Flat Wiring Harness — Product description
The Tekonsha 118464 is a T-One vehicle-specific harness that hands you a clean 4-way flat trailer connector without cutting into your tow vehicle's factory wiring. It's the plug-in replacement for a tired or damaged OEM towing harness, and it gets your trailer lights back to reliable in under an hour.
The Tekonsha 118464 is a T-One vehicle-specific wiring harness that gives you a clean 4-way flat trailer connector without cutting a single factory wire. It's a direct replacement for a tow vehicle's OEM towing harness, the kind that gets damaged, corroded, or goes missing over the years. If your trailer lights have gone flaky and the trouble traces back to the harness behind the bumper, this is the plug-in fix that gets you back on the road to the ramp.
Here's what makes the T-One easy to live with. It plugs straight into the connectors already sitting behind your vehicle's taillights. No splicing, no scotch-locks, no probing wires with a test light trying to figure out which one is the left turn signal. You unplug the factory connectors, seat the T-One inline, and route the 4-way flat to the back of the vehicle. Most folks with basic hand tools have it done in well under an hour.
A 4-way flat carries the essentials any lighted trailer needs. Ground, running and tail lights, and left and right turn and brake signals. That's the exact connector most boat trailers and small utility trailers run, so if you're pulling a single-axle boat trailer, this is almost certainly the plug you want. If your trailer has electric brakes or a reverse circuit that needs more pins, you'd be looking at a different connector setup. But for a standard lighted trailer, the 4-way flat is what you want, and it's what this harness delivers.
One thing to get right before you order. Because the T-One is a custom-fit design, part number 118464 is built for a specific list of vehicles. Check that it matches your year, make, and model, or send us your vehicle details and we'll confirm the fit for you. Swapping a tired OEM harness for the matched T-One gets your trailer lights back to reliable and keeps the wiring looking factory-clean.
Key Features
- 4-way flat output connector for trailer running and tail lights plus left and right turn and brake signals
- T-One vehicle-specific design plugs into the factory wiring connectors, no cutting or splicing
- Direct replacement for a damaged, corroded, or missing OEM tow-vehicle wiring harness
- Custom-fit harness matched to specific vehicle applications for a factory-clean install
- Installs in under an hour with basic hand tools
- Genuine Tekonsha T-One connector assembly, Tow Ready
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 | 4-Way Flat Replacement For OEM Wiring Harness |
|---|---|
| Brand | Tekonsha |
| Manufacturer Part Number | 118464 |
| UPC | 016118070477 |
| Connector Type | 4-Way Flat |
| Product Line | T-One |
| Fit Type | Vehicle-Specific Custom Fit |
| Configuration | Tow Ready |
| Function | Direct Replacement for OEM Wiring Harness |
Frequently asked questions
What does the 4-way flat connector run?
It carries the four circuits a basic lighted trailer needs: ground, running and tail lights, and left and right combined turn and brake signals. That covers most boat trailers and small utility trailers.
Do I have to cut or splice any wires?
No. That's the whole point of the T-One design. It plugs into the factory connectors already behind your taillights, so there's no splicing, no scotch-locks, and no guessing which wire is which.
Will this fit my vehicle?
The T-One is a custom-fit harness, so 118464 is built for a specific set of vehicles. Confirm it matches your year, make, and model before ordering, or send us your vehicle details and we'll check the fit for you.
Is this a replacement for the factory towing harness?
Yes. It's a direct replacement for a tow vehicle's OEM wiring harness, ideal when the original is damaged, corroded, or missing.
Can I pull a trailer with electric brakes using this?
Not on its own. A 4-way flat doesn't carry a dedicated brake-output circuit. If your trailer runs electric brakes, you'll need a connector setup with more pins and a brake controller.
What tools do I need to install it?
Just basic hand tools. Unplug the factory connectors, seat the harness inline, and route the 4-way flat to the rear. Most installs take under an hour.
