Tekonsha 118844 T-One 4-Way Flat Trailer Wiring Harness
Tekonsha 118844 T-One 4-Way Flat Trailer Wiring Harness — Product description
The Tekonsha 118844 T-One connector wires your Mitsubishi Outlander for towing without cutting a single factory wire. It plugs straight into the harness behind the taillights and adds a circuit-protected ModuLite HD module that draws power from the battery, so your trailer lights stay bright and the vehicle's electrical system stays protected. Clean 4-way flat output, ready for a trailer.
Getting your Outlander ready to tow shouldn't mean splicing into factory wiring and hoping for the best. The Tekonsha 118844 T-One connector is built specifically for the job. It's a plug-and-play harness that snaps into the existing connectors behind your taillights, so there's no cutting, no crimping, and no guessing which wire does what. If you can reach the taillight harness, you can install this.
What sets this kit apart is the ModuLite HD module. Instead of tapping the vehicle's low-current taillight circuits to run your trailer, the module pulls power straight from the battery through its own feed. That keeps the load off your factory bulbs and lighting modules, which matters on a newer Outlander where the electrical system watches for faults. The module is circuit protected, so a shorted trailer connector or a bad ground on the trailer side won't send trouble back into the vehicle.
The output is a standard 4-way flat connector. That gives you four circuits: ground, running and tail lights, left turn and brake, and right turn and brake. It's the most common setup for smaller trailers, utility trailers, and lightweight boat trailers with basic lighting. The module also handles signal conversion, taking the vehicle's separate turn and brake signals and combining them into the format a 4-way flat trailer expects.
Tekonsha's been building towing electronics for a long time, and the T-One line is their answer to messy universal wiring kits. Everything's pre-terminated to match the Outlander's harness, so the connectors only go together one way. That's what makes it hard to get wrong.
This is the right pick if you're towing a small trailer and want a clean, permanent install that looks factory. It's not a 7-way and won't run trailer brakes or a 12-volt charge line on its own, so if you're pulling a heavy travel trailer that needs electric brakes, you'll want a different setup. For bikes, a small utility trailer, or a light boat trailer, though, this is about as straightforward as trailer wiring gets. Most folks have it in and tested in under half an hour with basic hand tools.
Key Features
- Vehicle-specific T-One connector plugs into the Outlander's factory harness with no splicing or cutting
- Circuit-protected ModuLite HD module isolates the vehicle's wiring from trailer faults and shorts
- Powered converter draws current directly from the battery, not the taillight circuits, keeping factory bulbs and modules safe
- 4-way flat output covers ground, running and tail lights, left turn and brake, and right turn and brake
- Converts the vehicle's separate turn and brake signals into the combined format a 4-way flat trailer expects
- Pre-terminated plug-and-play connectors install in under 30 minutes 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 | T-One Connector Assembly With Circuit Protected ModuLite HD Module, 4-Way Flat |
|---|---|
| Brand | Tekonsha |
| Manufacturer Part Number | 118844 |
| UPC | 016118161328 |
| Connector Type | 4-Way Flat |
| Module | Circuit Protected ModuLite HD |
| Converter Type | Powered (battery-fed) |
| Circuit Protection | Integrated |
| Signal Conversion | Separate to combined turn and brake |
| Vehicle Fitment | Mitsubishi Outlander |
| Installation | Plug-and-play T-One, no splicing |
Frequently asked questions
What vehicle does the Tekonsha 118844 fit?
It's a vehicle-specific T-One connector built for the Mitsubishi Outlander. The connectors match the factory taillight harness, so it plugs in without adapters.
Do I have to cut or splice any factory wires?
No. The T-One design is fully plug-and-play. It snaps into the existing connectors behind your taillights, so there's no cutting, crimping, or splicing.
What does the ModuLite HD module actually do?
It's a powered converter that pulls trailer-lighting current straight from the battery instead of tapping the vehicle's taillight circuits. That protects the factory bulbs and lighting modules, and its built-in circuit protection keeps trailer-side shorts or bad grounds from feeding back into the vehicle.
What kind of trailer plug does this give me?
A standard 4-way flat connector with four circuits: ground, running and tail lights, left turn and brake, and right turn and brake.
Will this run electric trailer brakes?
No. A 4-way flat setup handles lighting only. If your trailer needs electric brakes or a 12-volt charge line, you'll need a 7-way setup and a separate brake controller.
Why use a powered converter instead of a simple wire tap?
Newer vehicles watch their lighting circuits for faults, and adding trailer load by tapping the taillights can trip warnings or overload a circuit. Drawing power from the battery keeps the factory system happy and gives your trailer lights a stronger, more consistent feed.
