Tekonsha 118285 T-One 4-Way Flat Trailer Connector
Tekonsha 118285 T-One 4-Way Flat Trailer Connector — Product description
The Tekonsha 118285 is a T-One 4-way flat connector that plugs into your tow vehicle's factory wiring to give you a standard trailer light hookup. No cutting, no splicing. It's a direct replacement for the OEM harness connector, and it feeds the running lights, turn signals, and brake lights on boat and utility trailers.
If you've ever crawled under a trailer trying to figure out why the running lights won't come on, you already know how much a clean electrical connection matters. The Tekonsha 118285 is a T-One 4-way flat connector that gives you exactly that. It's a direct replacement for the OEM wiring harness connector on your tow vehicle, so you get a standard 4-way flat plug ready for your trailer's lighting.
Here's the part that makes a T-One connector worth it. It's built to plug into your vehicle's existing wiring, no cutting and no splicing. That means you're not chasing down wire colors or crimping connectors on the side of the road. You tuck the factory plug into the T-One, route the 4-way flat to the back, and you're done. For anyone who tows a boat trailer, a utility trailer, or a small camper, that's the difference between a five-minute job and a frustrating afternoon.
The 4-way flat is the standard connector for trailers that run basic lighting. It carries your running lights, your left and right turn signals, brake lights, and a ground. If your trailer has a 4-way flat plug on it, this is the connector that feeds it power from the tow vehicle. Simple, proven, and the format most boat and utility trailers use out of the box.
One thing worth saying up front. T-One connectors are vehicle-specific, so the plug is shaped to match a particular factory harness. Before you order, confirm the 118285 matches your vehicle's tow wiring. Once you've got the right fit, it's about as easy an install as trailer wiring gets. Tekonsha has been building towing electrical gear for a long time, and this connector reflects that. It's a straightforward, reliable way to get your trailer lights wired without hacking into your truck's factory harness.
We ship in-stock Tekonsha parts the same day when your order's in before 3 PM ET, so if you're prepping for a weekend haul, you won't be waiting around. Wire it in, test your lights, and get on the water.
Key Features
- 4-way flat connector carries running lights, brake lights, left and right turn signals, and a ground for standard trailer lighting
- T-One plug-in design connects to your vehicle's existing wiring with no cutting or splicing
- Direct replacement for the OEM wiring harness connector on the tow vehicle
- Vehicle-specific fit means the plug matches your factory tow harness for a clean, secure connection
- Standard 4-way flat output works with boat trailers, utility trailers, and small campers
- Built by Tekonsha, a longtime name in towing electrical gear
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 | 118285 |
| UPC | 016118110623 |
| Product Series | T-One |
| Connector Type | 4-Way Flat |
| Assembly Type | Plug-In Connector Assembly |
| Application | OEM Wiring Harness Replacement |
Frequently asked questions
What does a 4-way flat trailer connector control?
It handles the basic trailer lighting circuits, your running lights, left and right turn signals, brake lights, and a ground. If your trailer runs standard lighting without electric brakes, the 4-way flat is all you need.
Do I have to cut or splice any wires to install it?
No. The T-One design is made to plug into your vehicle's existing factory wiring, so there's no splicing or crimping. You connect the factory plug to the T-One connector and route the 4-way flat to the rear.
Will the 118285 fit my vehicle?
T-One connectors are vehicle-specific, so the plug is shaped to match a particular factory harness. Confirm the 118285 matches your vehicle's tow wiring before ordering. If you're not sure, check your OEM connector against the part before installing.
Can I use this for a boat trailer?
Yes. Most boat trailers use a standard 4-way flat plug for their lights, and that's exactly what this connector provides. As long as your trailer has a matching 4-way flat, you're set.
What's included?
This is the T-One connector assembly. It gives you the plug-in connector and the 4-way flat output for your trailer. Confirm your vehicle's fitment so you get the right connector for your factory harness.
Does this support electric trailer brakes?
A 4-way flat carries lighting only, so it doesn't provide a circuit for electric trailer brakes. If your trailer has electric brakes, you'll want a connector with more pins along with a brake controller.
