Tekonsha 118670 T-One Connector with ModuLite Module
Tekonsha 118670 T-One Connector with ModuLite Module — Product description
The Tekonsha 118670 is a T-One connector assembly with the upgraded circuit-protected ModuLite module. It plugs into your vehicle's factory taillight connectors, powers the trailer lights off the battery, and keeps the load off your original wiring. No cutting, no splicing.
The Tekonsha 118670 is a T-One connector assembly built around the upgraded circuit-protected ModuLite module. If you're wiring up trailer lights and you'd rather not cut into your factory harness, this is the clean way to do it. The T-One plug drops into your vehicle's existing taillight connectors, and the ModuLite module handles the rest.
Here's what the ModuLite actually does. Instead of pulling trailer-light current straight through your vehicle's circuits, it draws power directly from the battery and uses your taillight signals only to switch the trailer lights on and off. That keeps the load off your factory wiring, which matters when you add a trailer with brighter or more numerous bulbs than the vehicle was designed to feed. The upgraded version adds built-in circuit protection, so a short or an overload at the trailer trips the module instead of frying a fuse or a wire back in the dash.
Installation is about as friendly as trailer wiring gets. The T-One connectors plug into the matching factory plugs at the rear of the vehicle, no splicing and no scotch-locks. You run a single power lead to the battery for the ModuLite, ground it, and you're done. Most folks knock this out in an afternoon with hand tools.
The output is a standard 4-way flat trailer connector, which covers basic trailer lighting: running lights, brake lights, and turn signals. That's the right setup for a lot of utility trailers, small boat trailers, and pop-up campers that don't need trailer brakes or a charge line.
One honest note on fitment. T-One connectors are vehicle-specific, so the plug on this harness is cut for a particular set of factory connectors. Before you order, confirm this 118670 matches your year, make, and model. If you're not sure, send us the vehicle details and we'll check it for you. We'd rather get you the right harness the first time than have you fighting a plug that won't seat.
Key Features
- T-One plug-in connectors mate to the vehicle's factory taillight plugs, so there's no cutting or splicing
- Circuit-protected ModuLite module draws trailer-light power from the battery, keeping the load off your factory wiring
- Built-in circuit protection trips on a trailer short or overload instead of damaging vehicle wiring
- Standard 4-way flat output covers running lights, brake lights, and turn signals
- Single power lead to the battery plus a ground completes the install
- Vehicle-specific harness for a factory-matched connection at the rear
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 Upgraded Circuit Protected ModuLite® Module |
|---|---|
| Brand | Tekonsha |
| Manufacturer Part Number | 118670 |
| UPC | 016118133356 |
| Module Type | Circuit-Protected ModuLite |
| Trailer Connector | 4-Way Flat |
| Installation | Plug-in T-One connectors, no splicing |
| Power Source | Battery-powered converter |
| Circuit Protection | Built-in overload protection |
Frequently asked questions
Do I have to cut or splice into my vehicle's wiring?
No. The T-One connectors plug straight into your factory taillight connectors at the rear of the vehicle. The only wire you run is a single power lead from the ModuLite module to the battery, plus a ground.
What does the circuit-protected ModuLite module do?
It's a powered converter. Rather than pulling trailer-light current through your vehicle's circuits, it draws power from the battery and uses your taillight signals just to switch the trailer lights. The circuit protection trips on a trailer short or overload so the fault doesn't reach your vehicle wiring.
What kind of trailer connector does this give me?
A standard 4-way flat. That covers running lights, brake lights, and turn signals, which is what most utility trailers, small boat trailers, and light campers use.
Will this work with trailer brakes?
No. A 4-way flat doesn't carry a brake-output or charge circuit. If your trailer has electric brakes, you'll want a brake controller and a heavier connector, not this harness on its own.
How do I know the 118670 fits my vehicle?
T-One connectors are cut for specific factory plugs, so fitment is by year, make, and model. Confirm the 118670 matches your vehicle before ordering. If you're unsure, send us the details and we'll verify it for you.
Does it need its own power connection?
Yes. The ModuLite module is powered, so it needs a lead to the battery and a ground to work. That direct feed is what lets it protect your factory wiring from the trailer's load.
