Tekonsha 118673 T-One ModuLite Trailer Connector
Tekonsha 118673 T-One ModuLite Trailer Connector — Product description
The Tekonsha 118673 is a T-One connector assembly with an upgraded, circuit-protected ModuLite module. It plugs into your tow vehicle's factory wiring and pulls trailer-light power straight from the battery, protecting the vehicle's circuits while giving your trailer a full, steady feed. Rated 4.2 amps on stop and turn, 7.5 amps on taillights.
The Tekonsha 118673 is a T-One connector assembly built around an upgraded, circuit-protected ModuLite module. If you're wiring up a tow vehicle for a trailer and you want the trailer lights running off their own protected power feed instead of pulling everything through the vehicle's factory circuits, this is the piece that does it.
Here's how it works. The T-One connector plugs into your tow vehicle's existing wiring, so you get a clean connection without cutting into the factory harness. The ModuLite module sits inline and pulls power directly from the battery to drive the trailer lights. That means your trailer taillights, brake lights, and turn signals get a full, steady feed, and the module keeps trailer-side faults from feeding back into the vehicle's sensitive electronics.
The circuit protection is rated for 4.2 amps on the stop and turn circuit and 7.5 amps on the taillight circuit. Those thresholds cover a standard trailer lighting setup with room to spare. If something on the trailer shorts out or overloads, the module trips instead of frying a fuse or a control module in the tow vehicle. That's the whole point of running a powered converter like this one instead of a plain splice-in adapter.
It's a solid choice for anyone towing a utility trailer, a small boat trailer, or a camper where you want the wiring done right the first time. The connector is designed as a vehicle-specific fit, so it lands in the factory plug and you're not left guessing which wire is which. Install is straightforward for most driveway mechanics, and once it's in, you've got a standard 4-flat trailer connector ready to hook up.
One thing to keep in mind. This assembly gives you the vehicle-side connector and the protected module. It does not include a brake controller, and it isn't a brake control harness on its own. If you're towing something with electric brakes, you'll want to pair it with the right controller for your setup. For basic trailer lighting though, this covers you, and it does it without putting your tow vehicle's electrical system at risk.
Key Features
- Circuit-protected ModuLite module pulls power straight from the battery, so trailer lights get a full, steady feed and the vehicle's circuits stay protected
- 4.2 amp stop and turn circuit rating handles a standard trailer's brake and signal load with margin to spare
- 7.5 amp taillight circuit rating keeps running lights bright without overloading the vehicle's factory wiring
- T-One connector plugs into the tow vehicle's existing harness, so there's no cutting or splicing into factory wires
- Vehicle-specific connector fit lands in the factory plug for a clean, guess-free install
- Circuit protection trips on a trailer-side short or overload instead of damaging the tow vehicle's electronics
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 Module, 4.2 Amp Stop/Turn and 7.5 Amp Taillights |
|---|---|
| Brand | Tekonsha |
| Manufacturer Part Number | 118673 |
| UPC | 016118134469 |
| Stop/Turn Circuit Rating | 4.2 Amp |
| Taillight Circuit Rating | 7.5 Amp |
| Module Type | Circuit-Protected ModuLite |
| Connector Assembly | T-One |
Frequently asked questions
Does the Tekonsha 118673 include a brake controller?
No. It's a T-One connector assembly with a circuit-protected ModuLite module for trailer lighting. It doesn't include a brake controller, so if you're towing a trailer with electric brakes you'll need to add a controller separately.
What do the 4.2 amp and 7.5 amp ratings mean?
Those are the circuit protection ratings. The module protects up to 4.2 amps on the stop and turn circuit and 7.5 amps on the taillight circuit, which covers a standard trailer lighting load.
Why use a powered module instead of a simple splice-in adapter?
The ModuLite module draws power directly from the battery to run the trailer lights, so the trailer gets full brightness and any trailer-side fault trips the module instead of feeding back into the vehicle's electronics.
Does installing this require cutting into my vehicle's wiring?
The T-One connector is designed to plug into your tow vehicle's existing factory harness, so there's no cutting or splicing on the vehicle side. The module still needs a power connection run to the battery.
What kind of trailer connector does it provide?
It gives you a standard 4-flat trailer connector, which is what most utility, boat, and small camper trailers use for lighting.
Is this connector vehicle-specific?
Yes. T-One connectors are made to match a specific vehicle's factory wiring plug, so check that part number 118673 matches your tow vehicle before installing.
