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  2. CURT
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2018 Ford Expedition
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CURT

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

Part Number: C32MJ
10 Reviews | 6 Questions
In Stock
$111.58
Retail:$159.95
You Save: $48.37
 Custom Fit Vehicle Wiring
Not Confirmed to Fit

2018 Ford Expedition

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Product Images

curt custom fit vehicle wiring trailer hitch 4 flat t-connector harness with 4-pole connector
curt custom fit vehicle wiring trailer hitch plug-in
curt custom fit vehicle wiring end connector plug-in c32mj

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In Use/Installed

2025 kia carnival custom fit vehicle wiring curt trailer hitch 4 flat t-connector harness with 4-pole connector
2025 kia carnival custom fit vehicle wiring curt end connector 4 flat on a
2025 kia carnival custom fit vehicle wiring curt 4 flat plug-in c32mj
2025 kia carnival custom fit vehicle wiring curt end connector plug-in c32mj
2025 kia carnival custom fit vehicle wiring curt trailer hitch end connector on a
2025 kia carnival custom fit vehicle wiring curt trailer hitch plug-in on a
2025 kia carnival custom fit vehicle wiring curt trailer hitch plug-in t-connector harness with 4-pole flat connector

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Easily add a 4-way trailer connector with this custom-fit harness. The T-connector plugs into existing wiring - no cutting needed. Powered converter protects vehicle circuits and ensures consistent trailer lighting for safe towing in any conditions. 1-800-940-8924 to order CURT custom fit vehicle wiring part number C32MJ 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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CURT Custom Fit Vehicle Wiring - C32MJ

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 inline with tail lights—no wire cutting.
  • Protects Vehicle Circuits: Powered converter isolates trailer load from vehicle wiring.
  • Clean Factory Look: Hidden design keeps wiring tucked away when not in use.
  • Ready for Accessories: 4-flat plug mates with common trailer and adapter types.

Features to know about

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

Hooking up trailer wiring doesn’t have to mean cutting into factory wires. This Curt T-Connector plugs straight into existing vehicle connectors to create a 4-flat trailer plug. It’s a hidden, plug-in design that keeps everything clean and simple—no wire tracing, no splicing, and no guesswork.

Reliable Power for Trailer Lights: Built-In Powered Converter

Some vehicles can’t handle trailer lighting loads on their own, but this harness takes care of that. The powered converter delivers consistent power to the trailer lights while protecting the vehicle’s sensitive electronics. You get stable performance for running, turn, and brake lights every time you hitch up.

Ready to Use with 4-Flat Connection: Standard Lighting Functions

The 4-pole flat connector provides the basic lighting functions most trailers need—running lights, brake lights, and turn signals. It’s the standard setup used by small and mid-size trailers, so you can plug in and go without needing adapters or extra wiring.

Clean Factory Fit: Hidden Plug and Lead Design

Instead of a bulky external harness, this kit tucks away neatly using factory connection points. The hidden plug-and-lead setup keeps the install out of sight and protected from road grime, giving you a clean look that still delivers full trailer lighting capability.

56551 CURT T-Connector - Surface Mount Technology - 4 Wire

Installation Details C32MJ Installation instructions

This Product Fits The Following Vehicles






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Ratings & Reviews

4.5

10 reviews
5 Stars
(6)
4 Stars
(3)
3 Stars
(1)
2 Stars
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1 Star
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by:
2025 Kia Carnival
It works and does what it should! The dealer told us at least 3 times they couldn't figure out any sort of wiring harnesses that would work but look at me, I'm smarter than a dealer mechanic again
by:
2026 Kia Carnival
The harness seems to be high quality and works well. My only suggestion is that heat shrink tubes should be provided to go over the crimped connections.
by:
2025 Kia Carnival
Product seems good so far but the installation instructions are not accurate. It suggests you pull the taillight out to the side after removing the two screws. the assembly MUST be pulled straight back not to the side. pulling to the side will brake the alignment pins!
by:
Thanks William for 2nd shipment, never received the first.Just need that first charge credited.
by:
2025 Kia Carnival
Easy too install. If installing on a 2025 Kia Carnival though the instructions for the tail light removal is misleading. It says to remove the tail lights by pulling outward on them from the side of the vehicle but the tail lights have to be pulled out by standing behind the vehicle. But the lights work great. Will be towing a trailer across country so will update review after.
Brooke M. profile picture
Etrailer Expert

Brooke M.

6/7/2025

Thanks for the heads up tip about the lights! That is good to note. When do you embark on the road trip?

by:
Worked great and perfect fit. Unfortunately Kia made the car a pain to install That’s no fault of Curt.
by:
I got everything ahead of original schedule. Thank you.
by:
2025 Kia Carnival
Easy install
by:
by:
2025 Kia Carnival
by:
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See what our Experts say about this CURT Custom Fit Vehicle Wiring

Do you have a question about this Custom Fit Vehicle Wiring?
  • Alternative 7-Way Connector for the Kia R0F67 AC600 on a 2025 Kia Carnival
    No, I do not Paul and I doubt Curt or Draw-Tite make anything other than a 4-way for the hybrid model. Aftermarket wiring harnesses for vans are typically limited to 4-way connectors like the item # C63RV for LED lights or the item # C32MJ for incandescent lights. I checked with Curt and these are confirmed to fit the 2025 Kia Carnival Hybrid. To add a 7-way connector you would also need the Universal Installation Kit item # ETBC7. The kit includes a pre-wired 7- and 4-way trailer connector...
    view full answer...
  • Options For Carrying 4 Bikes And A Spare Tire On A 2026 Kia Carnival
    Hi Raymond! I have a couple options you may be interested in, but that's quite a conundrum. I do know there are no 4 bike racks that can hold a spare tire as well as the bikes, but you may be able to use a cargo carrier, like the 24x60 etrailer Cargo Carrier for 2" Hitches # e98874. This has 500 pounds of carrying capacity and will handle the weight of your bikes and the spare tire perfectly. Space is a little limited, but you could also add the Stromberg Carlson Bike Rack Adapter for...
    view full answer...
  • Recommended Hitch, Wiring, and Brake Controller for a 2025 Kia Carnival
    Hey Justin, congrats on the new van. Since you do not have the factory tow package on your 2025 Kia Carnival, you are going to need to install two separate wiring harnesses if your goal is to tow a trailer with brakes. I have listed the parts you will need below: 4-Way Connector - If your Carnival has LED lights, you'll need the Curt T-Connector Vehicle Wiring Harness item # C63RV. This custom-fit T-connector plugs into your Kia Carnival's wiring harness, which is located behind the driver's-side...
    view full answer...
  • 2025 Kia Carnival Trailer Hitch and Wiring Recommendations
    Hey John, thanks for reaching out! I see you ordered the Curt Trailer Hitch Receiver # C67ER from us the other day (thank you for that!) so for a matching wiring kit I recommend the Curt # C63RV if you have LED lights or the Curt # C32MJ if you don't have LED lights. These aren't plug and play, but they do tee in behind your tail lights so you don't have to cut and splice any wiring. I'm not familiar with your Trailer Prewire Harness, but feel free to send me any photos of what you found! To...
    view full answer...
  • How Much Can I Tow With My 2025 Kia Carnival SX Prestige and What Do I Need
    Hey, Sheri! I’m happy to help with that! After looking into your 2025 Kia Carnival, it’s rated to tow up to 3,500 lbs with a 350-lb tongue weight. You can double check those numbers on the sticker inside the driver’s side door jam, that’ll give you the exact specs for your specific vehicle. We do have a hitch, part # e36KR, that is rated for 600 lbs tongue weight but you always want to go off the weakest link, which in this case is your Carnival. Given that, your best setup would be...
    view full answer...
  • Trailer Wiring Harness For A 2025 Kia Carnival LX Without LED Taillights
    Hi Darrell! To get your 2025 Kia Carnival LX without LED taillights wired up with a 4-Flat, you are going to want the following part: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C32MJ This is a plug and play wiring harness and attaches between the taillight wires (see included image), though you will need to run one wire to the battery for needed power. It does make it a little more difficult, but not overly so. Just be patient and you will get it done. What...
    view full answer...

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


Info for this part was:

Employee Dustin K
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Dustin K
Employee Scott A
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Scott A
Employee Matthew G
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Matthew G
Employee Chris R
Video Edited:
Chris R
Employee Katherine B
Edited by:
Katherine B
Employee Andy C
Installed by:
Andy C
Employee Sabrina W
Written by:
Sabrina W
Employee Daniel M
Test Fit:
Daniel M

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