Tekonsha 118784 T-One ModuLite HD Wiring Harness
Tekonsha 118784 T-One ModuLite HD Wiring Harness — Product description
The Tekonsha 118784 pairs a plug-in T-One connector with an upgraded, circuit-protected ModuLite HD module. It's the clean way to wire your trailer lights, with no cutting and no splicing into the tow vehicle's harness. The HD module pulls power straight from the battery and keeps a bad trailer circuit from taking your vehicle's wiring down with it.
If you tow, you know the weak point is almost always the wiring. The Tekonsha 118784 takes that headache off the table. It's a T-One connector assembly, which means it plugs into your tow vehicle's existing wiring and gives you a standard trailer connector on the other end. No cutting, no splicing, no guessing which wire does what.
The upgraded piece here is the circuit-protected ModuLite HD module. Instead of running trailer-light current through the tow vehicle's own circuits, the module pulls power directly from the battery and feeds the trailer on its own protected path. So if a trailer bulb shorts out or a connector corrodes, the module absorbs the fault and keeps your vehicle's wiring out of harm's way.
It's a good match for anyone towing a utility trailer, a boat trailer, or a small camper who wants a plug-in install with real circuit protection behind it. Keep the connector clean and dielectric-greased and this setup will run for years.
Key Features
- T-One connector assembly plugs into the tow vehicle's existing wiring for a no-splice install
- Upgraded circuit-protected ModuLite HD module isolates the trailer circuit from the vehicle's electrical system
- Draws trailer-light power directly from the battery instead of the vehicle's own light circuits
- Circuit protection shields your tow vehicle's wiring if a trailer light shorts or corrodes
- Tekonsha part number 118784 with a plug-in connection for a straightforward hookup
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 ® HD Module |
|---|---|
| Brand | Tekonsha |
| Manufacturer Part Number | 118784 |
| UPC | 016118152418 |
| Assembly Type | T-One Connector Assembly |
| Module | Circuit Protected ModuLite HD |
| Circuit Protection | Yes |
Frequently asked questions
Does the Tekonsha 118784 require cutting or splicing?
No. It's a T-One connector assembly, so it plugs into your tow vehicle's existing wiring and gives you a standard trailer connector on the other end. That's the whole point of the T-One design.
What does the ModuLite HD module actually do?
It powers your trailer lights directly from the vehicle battery on a separate, circuit-protected path instead of pulling that current through the tow vehicle's own light circuits. If a trailer bulb shorts or a connector corrodes, the module absorbs the fault and keeps your vehicle's wiring safe.
Is this the circuit-protected version?
Yes. Part 118784 is the upgraded circuit-protected ModuLite HD module, so the trailer side is isolated and protected from faults.
What kind of trailers does this work for?
It's a solid fit for utility trailers, boat trailers, and smaller campers where you want a clean plug-in install with real circuit protection behind it.
