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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 Ford Explorer
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CURT

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

Part Number: C56387
In Stock
$71.48
Custom Fit Vehicle Wiring
Not Confirmed to Fit

2019 Ford Explorer

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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 C56387 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 (16)
  • Q & A (0)
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CURT Custom Fit Vehicle Wiring - C56387

Highlights

  • Custom Fit for Your Vehicle: Works with your vehicle's wiring
  • Tow Without Factory Prep: 4-way flat connector powers trailer lights for safe towing.
  • Plug-and-Play Install: T-connector plugs into rear harness—no cutting or splicing needed.
  • Protects Vehicle Circuits: Powered converter isolates trailer load from car’s wiring.
  • Clean Power Connection: Hot lead must run directly to battery to prevent electrical damage.
  • Durable Fit: Uses existing grommets and trim for a neat, weather-protected routing.

Features to know about

Installs Cleanly Without Cutting or Splicing: Plug-In T-Connector Harness

Wiring up for towing doesn’t have to mean cutting into factory wires. The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector plugs directly into your vehicle’s existing wiring. It’s a hidden, plug-in style harness that keeps the install neat and straightforward, giving you a clean connection ready for trailer lights.

Protects Vehicle Electronics: Powered Converter with Direct Battery Lead

This harness includes a powered converter that draws power straight from the vehicle battery instead of the lighting circuit. That protects sensitive factory wiring and ensures reliable power for your trailer lights. The hot lead must be connected directly to the battery—never to an accessory outlet—to keep your electrical system safe and performing as it should.

Reliable Trailer Lighting Connection: Standard 4-Flat Plug

Once installed, the 4-flat connector gives you running lights, turn signals, and brake lights—everything needed for most small and mid-size trailers. It’s the same standard 4-way connection used on rental trailers, so it’s ready to hook up when you are.

Simple Wire Routing: Uses Existing Grommets and Frame Protection

The power wire can be routed outside and under the vehicle through an existing grommet at the rear. Running it along the frame keeps it protected from heat and moving parts. It’s a tidy way to route wiring without drilling into panels or leaving wires exposed.

Specs

Electrical

  • Connector type: 4-Pole Flat Trailer Connector
  • Power requirement: Powered Converter
  • Vehicle compatibility: No Tow Package
  • Installation type: Plug-In T-Connector
  • Connection location: Vehicle End Connector
  • Hot lead requirement: Must be run directly to the battery

Comparison image showing Curt trailer wiring harness connectors and technical callouts highlighting connection points for the Curt T-Connector Vehicle Wiring Harness with 4-pole flat trailer connector.


56387 CURT T-Connector Vehicle Wiring Harness with 4 Pole Trailer Connector

Replaces 56312

Similar to Tekonsha 118689

Installation Details C56387 Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:

Ratings & Reviews

4.5

16 reviews
5 Stars
(12)
4 Stars
(2)
3 Stars
(1)
2 Stars
(0)
1 Star
(1)
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by:
2017 Chevrolet Malibu
I installed this harness on my 2017 Malibu and it has worked flawlessly for a year now. Haul a small Bunk House pop-up camper.
by:
Great product, easy installation, works perfectly.
by:
Installed easy enough, the power wire was a little cumbersome with the change of wire sizes but all in all the kit works well and came with all the necessary connectors.
by:
2017 Chevrolet Malibu
Shipping was fast and it looks great on my car
by:
2017 Chevrolet Malibu
Pretty easy install , plug and play , if you can change a flat tire you can install this kit , I put it on a 2017 Malibu with ease , way better than one of those universal kits especially on newer vehicles
by:
This was the easiest install I have ever done! No stripping the insulation off to connect the wires to the turn signal wires. You just unplug the factory plugs in the trunk and plug one plug on the wiring harness into the factory receptacle and the other is a male plug that plugs into the female receptacle. The same thing is done on the opposite side of the vehicle. The other thing You have to do is connect a power wire to the hot side of the battery with a fuse that comes with the kit but take the fuse out of the harness till You have all the wires ran and the last thing You do is put the fuse in the holder after everything is connected,and the other end of the wire is fed to the trunk and connects to the black wire on the controller. There is a white wire that gets grounded to the car body. Last thing to do is turn the lights on and with a test light go to the 4 connector plug and and connect one end of the to the single bare pin and test the other female holes to be sure when the lights are on 1 lights up. Then turn the turn signal on and one of the other the other female should flash and lastly put the other turn signal on and test the last plug should flash with the other tail light. At that point I connect to My trailer to be sure everything works. Piece of cake. The time consuming part was running the power from the battery to the trunk. Not really hard just a little time consuming.
by:
Install is difficult, no fault of maker but the way the car is designed, great product but u need a lift to do this yourself otherwise very satisfied w product itself
T profile picture

T

12/18/2020

Very satisfied after 1 year!!

by:
Very good service listened to issue haas solution and gave simple instructions on fixing it. Not pleased that had to pay for reshipping but would use again!
by:
2017 Chevrolet Malibu
Well it just don't get any better than that fast service all the way around product was perfect
by:
A good product at a great price.
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Fast, accurate, fair price, as usual
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2017 Chevrolet Malibu
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See what our Experts say about this CURT Custom Fit Vehicle Wiring

  • Recommended Hitch and Wiring for a 2016 Chevrolet Malibu Hybrid
    Hey Jesse. For your 2016 Chevrolet Malibu Hybrid, I recommend the Curt Hitch item # C12185. This custom fit hitch has been confirmed to fit all models of the 2016 Malibu including the hybrid. The Curt item # C12185 is a class II hitch with a 1-1/4" receiver. It has a 3,500 lbs towing capacity and a maximum tongue weight of 350 lbs. This is our largest and highest capacity hitch for your car. I checked with Curt on the correct wiring harness. For your Malibu hybrid, you'll need their...
    view full answer...
  • Custom Wiring Harness for a 2018 Chevrolet Malibu
    Hey, Mark. Thanks For reaching out. That sounds frustrating to deal with. The 2018 Chevrolet Malibu had two different sub models, the Premier and the Non-Premier. The Curt harness # C56387 would be a fit for a Non-Premier model. We do carry the harness for the Premier model as well, part # C56313. Below are two pictures showing the slight differences in the two plugs. You can reply here or to the email with your VIN and I can double check which one your Malibu needs. What kind of trailer...
    view full answer...
  • How Can I Make the Lights on My Chevrolet Malibu Work While Towing on a Tow Dolly?
    Hello William, The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56387 that you were looking at is trailer wiring for if you want to pull a trailer with your Malibu. In order to tie into your 2024 Chevrolet Malibu while it is on the tow dolly you will need a 7 way that also has a 4 way on the back of the coach. You will want to swap yours out for the Curt Trailer Connector Adapter - 4-Way to 7-Way RV and 4-Way Flat # C57672. Then you will want to install...
    view full answer...
  • Recommended Hitch for a 2023 Chevy Malibu
    Yes, there is. You will want the Curt Trailer Hitch item # C12185. This hitch is custom fit and bolts to your 2023 Chevy Malibu with included hardware. This is a class II hitch with a 1-1/4" receiver. It has a 3,000 lbs towing capacity, and a 350 lbs maximum tongue weight. It will work great with your Thule bike rack. I have linked a couple of pictures below along with an installation video so you can see what this hitch looks like when installed. If you are planning on towing you will...
    view full answer...
    Image 1 for Image 2 for
  • How Can I Get the Most Towing Capacity Out of a 2018 Chevy Malibu
    I looked at the owner's manual for your 2018 Chevrolet Malibu and it states that the trailer should never be heavier than 1,000 pounds. It goes into more detail that other factors can influence the capacity (such as speed, altitude, temperature, and others) and that you should contact GM for specific information. Long story short the absolute maximum capacity of your Malibu is no more than 1,000 pounds for sure. With that being said, we do have the parts you need to get the Malibu set...
    view full answer...
    Image 1 for
  • Recommended Hitch and Wiring Harness for a 2024 Chevrolet Malibu Premier
    I would be happy to! To add a hitch to your 2024 Chevrolet Malibu Premier, I recommend the Curt item # C12185. This hitch fits all models of the 2024 Malibu including your Premier and bolts to it with included hardware. This is a class II hitch with a 1-1/4" receiver, that has a 2,000 lbs towing capacity, and a 350 lbs maximum tongue weight. For a wiring harness you will want the Curt T-Connector Vehicle Wiring Harness item # C56387. This custom-fit T-connector plugs into your Malibu's...
    view full answer...
  • Which Vehicle Wiring Harness Do I Need for a 2019 Chevrolet Malibu?
    The Curt T-Connector # C56313 is designed to work on the Premier Trim of the 2019 Chevrolet Malibu. For your Malibu LT I recommend the Curt T-Connector # C56387. This one is confirmed to fit your vehicle and work with the options that are included.
    view full answer...
  • Trailer Hitch Recommendation for 2018 Chevy Malibu
    For your 2018 Chevy Malibu the best hitch option is the Draw Tite part # 36652 which is a confirmed fit. I really like this hitch the best because it has a non-visibly cross tube which means it would be more concealed. For trailer wiring you'd want the part # C56313 for if you have a Premier and part # C56387 for if you do not.
    view full answer...
  • Hitch Receiver for Towing a Lawn Mower Trailer w/ a 2019 Chevrolet Malibu
    I have a solution for you but there are no class III hitches available for your 2019 Chevrolet Malibu. I recommend the Curt Trailer Hitch Receiver item # C12185. This is a custom fit, class II hitch, that bolts on with included hardware. It has a towing capacity that exceeds your Malibu's 1,000 lbs towing limit, so it being a class II hitch does not affect its ability to serve your needs. You should always go off of the component with the lowest towing capacity and in this case it will...
    view full answer...
  • Recommended Trailer Hitch Receiver and Wiring for Towing With 2016 Chevrolet Malibu
    For towing a trailer with your 2016 Chevrolet Malibu I recommend the Draw-Tite Trailer Hitch Receiver # 36652. This is a custom-fit Class II hitch with a 1-1/4" receiver. It has a maximum gross trailer weight of 3,500 lbs and max tongue weight of 350 lbs. Make sure to consult your owner's manual to see what your vehicle is capable of towing since it will be the limiting factor. This hitch has a concealed cross tube and comes with a limited lifetime warranty. For the most reliable wiring...
    view full answer...
  • Should the Power Wire for the Curt # C56387 be routed Inside or Outside on a 2018 Chevy Malibu
    Typically the power wire for a wiring harness like the T-Connector # C56387 that you are installing on your 2018 Chevrolet Malibu is routed outside and under the vehicle. If you can locate a grommet like part # A11GB at the rear of your vehicle you can then route the wire outside without drilling through your Malibu. Be sure to seal it back up with a gasket maker like part # LT37467. Once outside we usually try to route the wire through the frame as that will keep it protected pretty well....
    view full answer...
  • Recommended Wiring Harness and Installing a Trailer Hitch on 2016 Chevrolet Malibu
    The Curt Class II Receiver Hitch # C12185 referenced in your question is confirmed to fit your 2016 Chevrolet Malibu. The installation can be performed fairly easily by any local auto shop. No drilling is required, however the heat shield will need to be modified/trimmed and the exhaust will be temporarily lowered. The estimated installation time is around 50 minutes for an experienced mechanic. I have included the written installation instructions that you can reference. Keep in mind...
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  • What is the Correct 4-Flat Wiring Harness for 2016 Chevy Malibu Hybrid?
    I checked with Curt and the correct wiring harness for your 2016 Chevy Malibu hybrid is actually # C56387. I've added a link to a video review as well as the installation instructions of this harness for you to take a look at.
    view full answer...
  • C56387 - Is It Ok To Connect Power Wire To Accessory Outlet Instead Of Directly To Battery?
    No, you cannot run the power feed wire on the Curt # C56387 to an accessory outlet in the back seat. The hot lead MUST be ran directly to the battery. This is the only way to ensure your car's wiring and electrical systems are not otherwise damaged/affected. I know getting the wire to the battery can be a bit of a hassle, but it needs to be done. I have linked our install video below if you want to take a look.
    view full answer...

Do you have a question about this Custom Fit Vehicle Wiring?


Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Joshua S
Video Edited:
Joshua S
Employee Chris R
Video Edited:
Chris R
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
Employee John A
Test Fit:
John A

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