Tekonsha 118563 T-One ModuLite Wiring Kit | Mazda CX-5
Tekonsha 118563 T-One ModuLite Wiring Kit | Mazda CX-5 — Product description
The Tekonsha 118563 is the plug-in T-One connector for wiring your Mazda CX-5 to tow. It's got a circuit-protected ModuLite module built in, so the trailer lights pull power from the battery instead of loading up your factory tail light circuit. No splicing, no cut wires, and a standard 4-way flat out the back.
The Tekonsha 118563 is a vehicle-specific T-One connector built for the Mazda CX-5, and it's the clean way to wire your CX-5 for a trailer. No splicing, no cutting, no chasing wires under the dash. The harness plugs straight into the tow connector already sitting behind the CX-5's tail lights, and the trailer side gives you a standard 4-way flat.
What sets this one apart is the circuit-protected ModuLite module built into the harness. A basic converter just taps your tail light wires and runs the trailer lights off that same circuit. That works until the extra load trips a bulb-out warning or upsets a modern vehicle's electrical system. The ModuLite doesn't do that. It's a powered converter, so it pulls power for the trailer lights straight from the battery through a fused, circuit-protected line. Your CX-5's factory wiring only sees the signal, not the load.
For a boat trailer, that matters. Trailer lights live a hard life, dunked at the ramp and salted on the road, and the current draw only climbs as bulbs and grounds corrode. The powered ModuLite keeps that draw off your vehicle's delicate circuits and protects both sides. If a trailer light shorts out, the built-in circuit protection takes the hit instead of your CX-5's electronics.
Install is about as easy as trailer wiring gets. Find the factory tow connector behind the tail light, plug the T-One in, mount the module, and run the 4-flat to the back. Most folks have it done in under an hour with basic hand tools. You'll want to ground the module to clean bare metal and route the 4-flat so it isn't dragging on the road.
One thing to be clear on: this is the harness cut and terminated for the Mazda CX-5. It's not a universal kit. If you're towing with a different vehicle, tell us the year, make, and model and we'll point you to the right T-One for it.
Key Features
- Vehicle-specific T-One connector for the Mazda CX-5, plugs into the factory tow connector with no splicing or cutting
- Circuit-protected ModuLite powered module isolates the trailer load from your vehicle's wiring
- Draws trailer-light power directly from the battery through a fused line, not the tail light circuit
- Standard 4-way flat trailer connector output
- Built-in circuit protection guards the vehicle electronics if a trailer light shorts
- Plug-and-play install, typically under an hour with basic hand tools
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 | Tekonsha T-One Connector with Circuit Protected ModuLite Module |
|---|---|
| Brand | Tekonsha |
| Manufacturer Part Number | 118563 |
| UPC | 016118116557 |
| Vehicle Fitment | Mazda CX-5 |
| Connector Type | Custom-fit T-One, vehicle-specific plug-in |
| Trailer Connector Output | 4-way flat |
| Converter Type | Powered ModuLite module |
| Circuit Protection | Built-in, circuit protected |
| Power Source | Draws from vehicle battery |
| Installation | Plug-in, no splicing or cutting required |
Frequently asked questions
What is a T-One connector?
It's a vehicle-specific trailer wiring harness. Instead of splicing into your wires, the T-One plugs straight into the tow connector your Mazda CX-5 already has behind the tail lights. Cleaner install, no cut wires.
Does this run the trailer lights through my tail light circuit?
No, and that's the point of the ModuLite module. It's a powered converter that draws current for the trailer lights directly from the battery through a fused line. Your factory circuit only carries the signal, not the load.
What vehicle does the 118563 fit?
This harness is cut and terminated for the Mazda CX-5. It isn't a universal kit. If you're towing with something else, send us the year, make, and model and we'll match you to the right T-One.
What trailer connector do I get?
A standard 4-way flat, which is what most small boat trailers and utility trailers use for running lights, brake, and turn signals.
Do I need to cut or splice any wires?
No. The T-One plugs into the factory tow connector, so there's no cutting or splicing into the vehicle harness. You'll ground the module to bare metal and route the 4-flat to the rear.
What does circuit protected mean here?
The ModuLite module has built-in fused protection. If a trailer light shorts out or draws too much, the protection trips instead of letting the fault reach your CX-5's electronics.
