Tekonsha 118480 4-Way Flat Replacement Wiring Harness
Tekonsha 118480 4-Way Flat Replacement Wiring Harness — Product description
The Tekonsha 118480 is a 4-way flat replacement harness that steps in for your vehicle's factory towing wiring. It gives you a clean, standard trailer connector for running lights, turn signals, and brake lights on a small trailer. If you're rigging up a utility trailer or a light boat trailer, this is the plug-in piece that gets power back to the plug.
The Tekonsha 118480 is a 4-way flat replacement harness built to take over for your vehicle's factory towing wiring. It gives you a standard 4-way flat trailer connector so you can hook up the lights on a small trailer and get moving. Simple job, done right.
Here's what a 4-way flat actually does. It carries four circuits: ground, running or taillights, left turn and brake, and right turn and brake. That's everything a basic trailer needs for legal lighting on the road. Think utility trailers, small boat trailers, landscape haulers, and light pop-up campers. If your trailer plugs into a 4-way flat and only needs lights, this is the connector that feeds it.
Because it's a replacement harness and not a universal splice-in kit, it's designed to connect to the towing wiring your vehicle already has. That keeps the install clean and keeps you out of the taillight wiring with a test light and a roll of electrical tape. Before you order, take two minutes to confirm your vehicle has a compatible factory towing connection and that the 118480 matches it. A harness that plugs straight in saves you an afternoon.
One thing to be clear about. A 4-way flat handles lights and ground only. It won't run electric trailer brakes, and it doesn't carry a reverse or a charge circuit. If you're towing something heavy enough to need electric brakes, you're looking at a brake controller and a 7-way connector instead. This part is for the light-duty end of towing, and for that it's exactly the right tool.
Tekonsha has been building trailer towing electrical for a long time, and they're a name you'll see on brake controls and wiring at just about every hitch shop. The 118480 carries that same reputation. Get the right connector on your vehicle, plug in your trailer, walk around and check that your lights blink and glow like they should, and you're ready to tow.
Key Features
- 4-way flat output: powers running lights, left and right turn and brake signals, plus ground for basic trailer lighting
- T-One replacement design: connects to your vehicle's existing towing wiring instead of a universal splice-in converter
- Standard 4-way flat plug matches the most common light-duty trailer connector
- Built as an OEM-style replacement harness for a clean, plug-in install
- Backed by Tekonsha, a longtime name in trailer towing electrical
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 | 118480 |
| UPC | 016118073683 |
| Product Line | T-One |
| Connector Type | 4-Way Flat |
| Harness Type | OEM Replacement |
| Circuits | Ground, Running Lights, Left Turn/Brake, Right Turn/Brake |
Frequently asked questions
What does the 4-way flat connector power?
A 4-way flat carries four circuits: ground, running or taillights, left turn and brake, and right turn and brake. That covers legal lighting for a basic trailer. There's no separate circuit for electric brakes, reverse lights, or trailer battery charging.
Is this a plug-in replacement or a splice-in kit?
It's built as a replacement for the OEM towing wiring harness, so it's designed to connect to the towing wiring your vehicle already has rather than tapping into your taillight circuits. Confirm your vehicle has a compatible factory towing connection before you order.
Will this work with electric trailer brakes?
No. A 4-way flat handles lights and ground only. Electric trailer brakes need a brake controller and a heavier connector like a 7-way. Use the 118480 for light-duty trailers that only need lighting.
What can I tow with a 4-way flat like this?
Small utility trailers, light boat trailers, landscape haulers, and light pop-up campers all run fine on a 4-way flat as long as they only need lighting and ground. If the trailer plug matches a 4-way flat, this connector feeds it.
What are the part number and UPC so I can confirm fit?
This is Tekonsha MPN 118480, UPC 016118073683. Since it's an OEM replacement harness, check it against your vehicle's factory towing connection before ordering to make sure it matches.
