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  1. Custom Fit Vehicle Wiring
  2. CURT
  3. 4 Flat
  4. No Tow Package
  5. Trailer Hitch Wiring
  6. Vehicle End Connector
THIS ITEM IS NOT A FIT FOR
2019 Infiniti Q70
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CURT

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Part Number: C56385
$52.49
Retail:$88.95
You Save: 41%
Custom Fit Vehicle Wiring
Not Confirmed to Fit

2019 Infiniti Q70

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etrailer Installation
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Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into existing wiring. Powered converter reduces strain on wiring system and is made using SMT to ensure superior performance. 1-800-940-8924 to order CURT custom fit vehicle wiring part number C56385 or order online at etrailer.com. Free expert support on all CURT products. Great prices and Fastest Shipping for Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
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  • Reviews (4)
  • Q & A (0)
  • Videos (1)
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CURT Custom Fit Vehicle Wiring - C56385

Highlights

  • Custom Fit for Your Vehicle: Works with your vehicle's wiring
  • Tow-Ready Setup: 4-way flat connector powers trailer signal and brake lights.
  • Plug-and-Play Install: T-connector plugs in behind tail lights without splicing wires.
  • Clean Wiring Route: Converter mounts inside vehicle using existing grommets for power wire.
  • Reliable Signal Match: Built-in converter syncs vehicle lighting with trailer lights.
  • No Factory Tow Prep Needed: Adds trailer wiring to vehicles without a tow package.

Features to know about

Installs Without Cutting or Splicing: Plug-In Harness

Wiring a trailer doesn’t have to mean splicing into factory wires. This Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector plugs directly into your vehicle’s existing wiring. No cutting, no tapping—just a quick plug-in connection that keeps the factory wiring intact and working like it should.

Ready for Basic Trailer Lighting: 4-Flat Connector Output

The included 4-flat trailer connector gives you the standard lighting functions you need for towing—running lights, brake lights, and turn signals. It’s an easy way to power your trailer lights and stay safe and visible every time you hook up.

Clean Install Using Factory Grommets and Trim

Getting the harness inside the vehicle is simple. You can route the power wire through an existing firewall grommet or under the vehicle using the grommet near the spare tire compartment. That means no drilling or messy routing—just a clean, factory-style finish.

Works with Vehicles Without a Factory Tow Package: Integrated Converter

If your vehicle didn’t come with trailer wiring, this harness has you covered. The built-in converter handles the signal translation needed for trailer lights, so it works even if your vehicle doesn’t have a tow package. It’s a straightforward way to get reliable trailer lighting without extra adapters or custom wiring work.

Specs

  • Comparison image showing CURT T-Connector vehicle wiring harnesses with labeled connectors and wiring layouts for trailer hitch installation reference.

56385 CURT T-Connector Vehicle Wiring Harness with 4 Pole Trailer Connector

Installation Details C56385 Installation instructions

This Product Fits The Following Vehicles




Video of Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
Video Thumbnail Video Player Dialog

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Curt Custom Fit Vehicle Wiring - Trailer Hitch Wiring - C56385 Review

Speaker 1: Today we're taking a look at the Curt T-connector vehicle wiring harness with a four-pull flat trailer connector. This product fits certain years and models of the Toyota Yaris. To ensure that this is a fit for your vehicle, you can use the vehicle fit guide located at etrailer.com.This unit, once installed, provides a four-way flat connector at the back of your vehicle to power your trailer's signal lights. It is compatible with five-pull, six-pull, and seven-pull adapters. Adapters are sold separately. And it comes with a dust cap for the four-way flat connector.

That way you can cover up the connection points when the plug's not being used.All the wire on the unit runs to this black box. This is the included tail light converter. This ensures that your vehicle's wiring matches that of your trailer's the powered module connects directly to the vehicle battery through the wiring to avoid overloading the vehicle's electrical system.The unit's constructed using surface mount technology for consistent, reliable performance. What that does is it maximizes the trailer light yield and intensity while producing minimal heat and ensures superior operation, even in rough road conditions.The unit is designed to connect quickly and easily. All you need to do is locate the connection points in the rear cargo area and plug in your T-connectors.

These are custom fit for your vehicle, so they're going to match up perfectly with the ports on the vehicle, and they snap lock together for a nice, tight, secure fit.Once you have those plugged in, you will need to make a ground connection. Your ground wire is the white wire with the ring terminal attached to it. You want to get that grounded to a suitable grounding location, and you can use the included grounding screw to do that if needed.Then you'll need to mount the converter box to a safe, out-of-the-way location, and you can do that with the cable ties. You can also use the double-sided adhesive foam tape provided with the kit.Next, you'll run the hot lead to the vehicle battery. That's the short black wire coming out of the box.

This gets connected to one end of the bundle with one of the included butt connectors. The other end of the bundle runs to the vehicle battery, gets another butt connector attached to it, and gets connected to one half of the fuse holder. The other half of the fuse holder gets a ring terminal attached to it and gets connected to the positive post of the vehicle battery. It does come with your 10-amp fuse, goes directly into the fuse holder, and it's got the cap that goes over to keep it safe and protected.Once you have that done, you can secure any excess or slack in the wiring with the included cable ties. Once your installation's complete, the four-way connector will be stowed in an out-of-the-way location within your rear cargo area.

Plenty of wiring here, so you can extend it out the back when you need to use it, roll it up, tuck it away when you don't.It is recommended that you use a small amount of dielectric grease in all of your electrical connections, like the plugs on the vehicle and the 4-port connector itself. That grease is specifically designed to prevent corrosion to the connection points. It's sold separately and available at etrailer.com.When it comes to the maximum amperage for the stop and turn lights, we're looking at 3 amps per circuit, and the for tail lights we're looking at 6 amps per circuit.That's going to do it for today's look at the Curt T-connector vehicle wiring harness.

Customer Satisfaction Score:

Ratings & Reviews

5.0

4 reviews
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by:
2018 Toyota Yaris
Reçu en bon états merci

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Received in good condition thank you ]
by:
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by:
4
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See what our Experts say about this CURT Custom Fit Vehicle Wiring

  • Trailer Hitch Recommendation for 2015 Toyota Yaris
    For a newer vehicle like yours I would go with the Curt hitch part # C11480 which is a confirmed fit and does not require any fascia trimming. Any time you don't have to modify a new vehicle, I recommend going that route. For ball mounts we have the part # C45572 for a 2 inch ball or the part # C45571 for 1-7/8 inch ball. Then for trailer wiring you woudl want the part # C56385 which is a confirmed fit. Due to the light duty nature of your vehicle, I would not imagine that a trailer with...
    view full answer...
  • Running Power Wire To Powered Light Converter For Trailer Wiring
    You can run a power wire in a couple different ways. You can run it through the interior or under the vehicle. To get inside the vehicle, you can either find a grommet in the firewall that is used by other wires, or is unused or you can run it under the car and through the grommet at your spare tire compartment. I've attached an article to help further.
    view full answer...

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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Cole B
Installed by:
Cole B
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
Updated by:
Kristina F
Employee Isabelle B
Updated by:
Isabelle B
Employee Amanda M
Written by:
Amanda M

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