Tekonsha 118835 ModuLite HD Trailer Connector Harness
Tekonsha 118835 ModuLite HD Trailer Connector Harness — Product description
The Tekonsha 118835 is a plug-in connector assembly built around the upgraded ModuLite HD module. It powers your trailer's lights straight from the tow vehicle's battery, so the trailer draws its own current instead of loading down your vehicle's circuits. Circuit protection is built right in. A clean, no-splice way to wire up for towing.
If you tow a boat trailer, a utility trailer, or a small camper, the wiring is where a lot of headaches start. The Tekonsha 118835 takes most of that trouble off the table. It's a connector assembly with the upgraded, circuit-protected ModuLite HD module already built in, so you get a clean electrical connection between your tow vehicle and whatever you're pulling.
Here's what makes the ModuLite line different from a basic splice-in converter. It's powered. Instead of pulling the trailer's lighting current through your vehicle's taillight wiring, the module draws power directly from the battery. Your trailer lights get their own dedicated supply, and your vehicle's circuits aren't asked to carry a load they were never designed for. That matters more than people think, especially on newer vehicles with sensitive lighting electronics that don't take kindly to extra draw.
The HD in the name is the upgraded piece. It's the heavier-duty module with built-in circuit protection, so a short or an overload on the trailer side doesn't travel back and take out something expensive under your dash. If a trailer light fault happens, the protection does its job and your vehicle wiring stays intact.
Installation is meant to be straightforward. This is a connector assembly, so it plugs into the matching factory connector on the vehicle rather than asking you to cut and splice into the harness. Route it, plug it in, mount the module, and you're wiring trailers instead of chasing gremlins. That said, T-One style connectors are vehicle-specific, so confirm that 118835 is the correct application for your year, make, and model before you order. If it's the right part number for your vehicle, it's about as close to plug-and-play as trailer wiring gets.
This is Tekonsha, the name most tow techs reach for first when it comes to brake controls and towing electrical. It's honest, reliable gear. For anglers and boaters running a trailer to the ramp every weekend, a solid, protected wiring connection is one less thing to worry about when you're backing down the launch. Wire it once, do it right, and forget about it.
Key Features
- Upgraded ModuLite HD module with built-in circuit protection guards your tow vehicle's wiring from trailer-side shorts and overloads.
- Powered converter design draws trailer lighting current straight from the battery instead of your vehicle's taillight circuits.
- Plug-in connector assembly installs without cutting or splicing into the factory harness.
- Vehicle-specific T-One style fit for a clean, direct connection when matched to the correct application.
- Tekonsha towing-electrical engineering, the brand tow techs trust for brake controls and trailer wiring.
- Manufacturer part number 118835, UPC 016118160031, for easy verification and reordering.
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 | Connector Assembly With Upgraded Circuit Protected ModuLite® HD Module |
|---|---|
| Brand | Tekonsha |
| Manufacturer Part Number | 118835 |
| UPC | 016118160031 |
| Keystone Part Number | T1M118835 |
| Module | ModuLite HD (Circuit Protected) |
| Circuit Protection | Built-in |
| Connector Type | Plug-in connector assembly (T-One style) |
| Product Type | Trailer taillight converter harness |
Frequently asked questions
Do I have to cut or splice into my vehicle's wiring to install this?
No. The 118835 is a plug-in connector assembly. It's designed to connect to the matching factory connector on your vehicle, so you can wire up for towing without cutting into the harness. Route it, plug it in, and mount the module.
What does the ModuLite HD module actually do?
It's a powered taillight converter. Rather than pulling your trailer's lighting current through the vehicle's own light circuits, it draws that power directly from the battery. Your trailer lights get a dedicated supply and your vehicle wiring isn't overloaded.
What does 'circuit protected' mean here?
The HD module has built-in circuit protection. If a short or overload happens on the trailer side, the protection keeps that fault from traveling back into your vehicle's electrical system. It's insurance for the expensive wiring under your dash.
Will this fit my vehicle?
T-One style connector assemblies are vehicle-specific. Before ordering, confirm that part number 118835 is listed as the correct application for your exact year, make, and model. If it matches, it plugs right in.
What's the difference between ModuLite and ModuLite HD?
HD is the upgraded, heavier-duty version of the ModuLite module. It adds built-in circuit protection and is built to handle towing electrical loads with more margin than the standard module.
