Tekonsha 118482 4-Way Flat Replacement Harness
Tekonsha 118482 4-Way Flat Replacement Harness — Product description
The Tekonsha 118482 is a vehicle-specific 4-way flat replacement harness. It plugs into your factory tow wiring, no cutting or splicing, and gives you a fresh 4-way flat plug for your trailer lights. The clean fix when the original connector gets crushed, corroded, or goes missing.
The Tekonsha 118482 is the replacement 4-way flat harness for a vehicle that already has factory tow wiring in place. If your original connector got crushed at the hitch, corroded out, or went missing, this is the clean way to get your trailer lights working again without hacking into the loom.
Here's how it works. The harness plugs straight into your vehicle's existing OEM connectors and gives you a standard 4-way flat plug at the back. No cutting, no splicing, no scotch-locks that fail two seasons later. You're tapping the factory wiring the way the manufacturer intended, so your turn signals, brake lights, and running lights all carry through to the trailer.
A 4-way flat is the light-duty standard. It powers trailer running lights, both turn signals, and the brake lights. That covers most small utility trailers, boat trailers, bike racks with a light bar, and lightweight teardrop campers. What it doesn't do is run electric trailer brakes or a charge line. If your trailer has its own brakes, you're into 7-way territory and you'll want a brake controller too.
Tekonsha has been making towing electronics for a long time, and it shows in the small stuff. The connector housings seal against road spray, the terminals resist corrosion, and the wire gauge is matched to the load so you're not chasing dim trailer lights down the road. This is the same style of harness that ships on the factory tow package, not a universal adapter you have to force into place.
One thing to get right before you order: this is a vehicle-specific replacement. Confirm the 118482 fits your make, model, and year before you buy. If you're not sure, send us your vehicle details and we'll check it against the fitment data. Get the right one and it's a ten-minute job. Locate the factory tow connectors behind a rear trim panel or in the spare tire area, unplug the old harness, click this one in, and route the 4-way flat where you can reach it at the hitch.
Key Features
- 4-way flat output powers trailer running lights, turn signals, and brake lights
- T-connector design plugs into your vehicle's factory tow wiring, no cutting or splicing
- Direct replacement for the OEM tow-package harness, matched to your vehicle
- Sealed connector housings and corrosion-resistant terminals stand up to road spray
- Correct wire gauge for the load, so trailer lights stay bright
- Vehicle-specific fit, installs in about ten minutes with no tools on most vehicles
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 | 118482 |
| UPC | 016118073676 |
| Trailer Connector | 4-Way Flat |
| Connector Style | T-Connector Plug-In |
| Replaces | Factory OEM Tow Wiring Harness |
| Installation | Plug-in, no wire splicing |
| Fitment | Vehicle-specific, verify by part number |
Frequently asked questions
What does a 4-way flat connector power?
The four wires carry your trailer's running lights, left and right turn signals, and brake lights. That's everything a light-duty trailer needs. It does not run electric trailer brakes or send a 12-volt charge line.
Do I have to cut or splice any wires?
No. The 118482 is a T-connector, so it plugs straight into your vehicle's existing factory tow connectors. Unplug the old harness, click this one in, and you're done. No scotch-locks, no taping into the loom.
Will this work if my trailer has its own brakes?
Not on its own. A 4-way flat handles lights only. If your trailer has electric brakes you need a 7-way connector and a brake controller. Reach out and we'll point you to the right setup for your vehicle.
Is this a universal harness?
No, it's vehicle-specific. Tekonsha built the 118482 to replace a particular factory tow harness, so confirm the part number matches your make, model, and year before ordering. Send us your vehicle details if you want us to check.
My original connector got damaged. Is this the right fix?
That's exactly what this is for. If your factory 4-way flat got crushed, corroded, or went missing, this replaces it and plugs back into the same OEM connectors. You keep the factory wiring and just swap the end.
Do I need any tools to install it?
For most vehicles, no. The connectors are keyed and click together by hand. You may need to pull a trim panel or reach into the spare tire area to find the factory plugs, but the harness itself is a tool-free swap.
