Tekonsha 118378 4-Way Flat T-Connector Harness
Tekonsha 118378 4-Way Flat T-Connector Harness — Product description
The Tekonsha 118378 is a T-Connector harness that hands you a clean 4-way flat trailer plug without cutting into your factory wiring. It plugs into the existing OEM harness, so towing a small trailer stays a simple, tidy job.
The Tekonsha 118378 is a T-Connector wiring harness that gives you a 4-way flat trailer plug without cutting into your vehicle's factory wiring. It taps into the existing OEM harness, so you plug it in where the connectors already live and route the 4-way flat out to the back. No splicing, no scotch locks, no guesswork.
This is the harness you want when you'd rather not butcher a factory wiring loom just to tow a small trailer. It replaces the OEM wiring harness with a matched connector on each end, so the fit is plug-and-play. Good for a utility trailer, a small boat trailer, or a bike rack that needs running lights and turn signals wired up right.
It's a straightforward install for most folks. You find the factory connector, plug the T in line, and run the 4-way flat back to the hitch. That's it.
Key Features
- 4-Way Flat output, the standard connector for basic trailer lighting like running lights, brakes, and turn signals
- T-Connector style, taps into the factory harness with no cutting or splicing
- Direct replacement for the OEM wiring harness, plug-and-play fit
- No scotch locks or spliced connections needed to install
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 | 118378 |
| UPC | 016118058635 |
| Connector Type | 4-Way Flat |
| Harness Style | T-Connector |
| Replaces | OEM Wiring Harness |
Frequently asked questions
What connector does this give me?
A 4-way flat, the standard plug for basic trailer lighting like running lights, brake lights, and turn signals.
Do I have to cut into my vehicle's wiring?
No. It's a T-Connector, so it plugs into the existing factory harness. No splicing and no scotch locks.
What does it replace?
It's a direct replacement for the OEM wiring harness, so it goes in where the factory connector already sits.
Is this a hard install?
For most people it's a straightforward plug-in job. You find the factory connector, plug the T in line, and run the 4-way flat back to the hitch.
