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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
Curt T-Connector Vehicle Wiring Harness with 4-Way Flat Trailer Connector
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CURT

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

Part Number: C63NR
In Stock
$76.01
Retail:$133.95
You Save: 43%
Custom Fit Vehicle Wiring

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etrailer Installation
We'll connect you with nearby partnered installers who know this exact setup.
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 C63NR 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-Way Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
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CURT Custom Fit Vehicle Wiring - C63NR

Highlights

  • Custom Fit for Your Vehicle: Works with your vehicle's wiring
  • Tow-Ready Setup: 4-way flat connector powers trailer brake, tail, and turn lights.
  • Plug-and-Play Install: T-connector plugs inline with tail light wiring—no splicing needed.
  • Reliable Power Feed: Includes wire run to battery to supply converter module.
  • Clean Hidden Look: Harness can be routed behind panels for a tidy finish.
  • LED-Compatible Output: Powered converter ensures proper signal to modern trailer lights.

Features to know about

Plug In Without Cutting Wires: T-Connector Harness

Wiring for trailer lights usually means finding and splicing the right wires, but this harness skips the guesswork. The Curt T-Connector plugs inline behind the tail lights, so you don’t have to cut or modify your wiring. It’s a clean, plug-in setup that keeps everything neat and easy to hide for a factory look.

Power Where You Need It: Powered Converter Module

Some factory systems don’t have enough power to run trailer lights safely. This harness includes a powered converter that connects directly to the battery for a steady, protected power source. That not only keeps your vehicle’s electrical system safe but also ensures your trailer’s running, turn, and brake lights stay bright and reliable.

Covers the Essentials: 4-Way Flat Connector

With its 4-flat connector, this setup gives you everything you need for standard towing—running lights, turn signals, and brake lights. The wiring is ready to go, so once installed, you can hook up small or mid-size trailers without extra adapters or modifications.

Keeps the Install Clean: Hidden Vehicle-End Design

The harness tucks neatly out of sight when not in use. Since it’s designed as a hidden plug-and-lead style connection at the vehicle end, you can keep your bumper area clear until you’re ready to tow. It’s a tidy solution that blends convenience with a clean finish.

Specs

Electrical and Compatibility

  • Connector type: 4-Way Flat
  • Harness type: Plug-In T-Connector
  • Compatibility: Fits 2021–2024 Ford F-150
  • Power source: Requires running a power wire to the vehicle battery
  • Functionality: Provides brake lights, running lights, and turn signals (no reverse light function)
  • Converter: Powered converter included
  • Installation location: Plugs in behind vehicle tail lights
  • Application: Vehicles without factory tow package

Comparison image of Curt T-Connector vehicle wiring harnesses showing labeled components, plug-in connectors, and converter boxes for trailer wiring installation.


56486 CURT T-Connector Vehicle Wiring Harness with 4 Pole Trailer Connector

Installation Details C63NR Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:

Ratings & Reviews

5.0

1 reviews
Review sort icon
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.

by:

Great product. Ended up not needing but appeared to be exactly what you want for hooking up trailer lights in an F150


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1

See what our Experts say about this CURT Custom Fit Vehicle Wiring

  • Trailer Hitch and Wiring for 2022 Ford F-150 Without Factory Tow Package
    Hi Alexander; assuming you have the factory step bumper you can use the Draw-Tite Ultra Frame Trailer Hitch Receiver # DT35MR you were looking at. For the wiring, I would check to see if you have the factory wiring harness plugged into the back of the dummy plug on your bumper. If you do you can pull the dummy plug and add the # HM40975. If it doesn't work as is, you may have to run it by the dealer to activate the tow package circuits. If you do not have any factory wiring we will have...
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  • Parts Needed To Add a 7-Way Connector and Brake Controller to a 2023 Ford F-150 XLT w/out a 7-Way
    Hey Bill. Since your 2023 Ford F-150 XLT didn't come with a factory 7-way you'll need two separate wiring harnesses to add one to your truck. The first one you'll need is a 4-way connector that's going to plug in behind your tail lights. You'll need to choose from one of the following options depending on what style your lights are and if you have backup sensors: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector item # C75WR - Incandescent tail lights, no backup...
    view full answer...
  • How to Add a 7-Way Connector to a 2023 Ford F-150 XLT w/out the Towing Package
    No, we do not James and there isn't going to be a plug in one if you don't have the tow package. If your 2023 Ford F-150 XLT doesn't have the factory tow package that came with the 7-way there's no USCAR connector, pictured below, to plug a custom fit connector to. The 4-way t-connectors like item # C63NR that fit your F-150 plug into a factory port are only included with the models that came with the tow package. Now if you find a USCAR connector behind your bumper you can install the...
    view full answer...
  • Solution for 7-Way Wiring On 2023 Ford F-150 XLT
    Hello Emanuel; the # C56413 fits the 2015 - 2020 models of the F-150 so it won't work with your 2023. If you have a 7-way dummy plug with wiring plugged into the back of it you can use the 7- and 4-Pole Trailer Connector Socket # HM40975. If you don't have any kind of wiring the installation will be more extensive. You will have to start by adding a 4-way. You can choose from one of the following based on your lights: -Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer...
    view full answer...
  • Options For Wiring In A Tailgate Light Bar On A 2023 Ford F-150
    Hey Glen, There's a few different ways you can accomplish this. Which light kit do you have specifically? A lot of kits like this will typically have some sort of adapter tee that can tie into the factory wiring for a super quick installation. If your light kit doesn't have a tee harness then you can use part # PK11932 to tee into your factory wiring and then only use the wires from the 7-way end that are necessary for the 4-pole connector and splice them to the light bar's wire harness....
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  • Parts Needed To Add A Secondary 4-Pole Connector For A Trailer Hitch Light
    Hey Damion, The Curt T-Connector Vehicle Wiring Harness # C63NR would be a compatible fit for your 2024 Ford F-150. This plugs into your tail light wiring and would require you to run a wire up to the battery for power. For a cleaner look you could probably just swap out your factory 7-way with the Reese Multi-Plug Wiring Harness for Factory Tow Package # 74682, which would have a 4-way connector for your light as well. This would plug into the factory 7-way wiring so the only modification...
    view full answer...
  • Help Identifying Plug On Bumper Of A 2021 Ford F-150 & Wiring Harness Options
    Hello Leslie, I can definitely help with this. So, the plug in your picture is not actually an electrical plug at all. The plug you are seeing is for lowering the spare tire. Your remove it with the key to allow access to the spare tire. Since you do not have any trailer wiring currently you will need two wiring kits for a 4-way and a 7-way. You will need the Curt T-Connector # C63NR as well as the Universal Installation Kit # ETBC7. This will be everything you need to install a 7-way,...
    view full answer...
  • Will The Curt T-Connector C63NR Fit A 2024 Ford F150 XLT?
    Hello and thanks for reaching out. The Curt T-Connector # C63NR will indeed fit on your 2024 Ford F150 XLT. Just like you said it will plug in behind the tail lights and you will run a wire to the battery to power the converter module. Keep in mind that this is a 4 flat connector, so you get brake lights, running lights and turn signals. The 4-flat does not have a reverse light function.
    view full answer...
  • Can Curt T-Connector be Used to Activate 2021 Ford F-150 Tail Lights for Flat Towing
    The Curt T-Connector # C63NR you're installing on your 2021 Ford F-150 is designed to send power to a trailer, but for a flat tow setup you need a wiring harness designed to receive power, and for that I recommend the Roadmaster diode kit: - Hybrid # RM-15267 - non-Hybrid # RM26FR Both parts are installed by splicing into the wiring on your truck and gives you everything you need to get the power from the RV plug back to the tail lights on your F-150.
    view full answer...

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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Wilson B
Updated by:
Wilson B
Employee Sabrina W
Written by:
Sabrina W

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