bing tracking image
  1. Custom Fit Vehicle Wiring
  2. CURT
  3. Custom Fit
  4. Trailer Hitch Wiring
  5. 4 Flat
  6. Powered Converter
Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

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

Item # C56038
Retail:$64.10
Our Price: $38.03
You Save: 41%
Custom Fit Vehicle Wiring

Will this fit?

To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.

Shipping Weight: 0.9 lbs
Add to cart
In Stock
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

Customer Photos

Need help with installation?
Locate installers near me
Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. Connector plugs directly into existing wiring - no cutting, splicing or tapping required. Converter is made using SMT to ensure superior performance. 1-800-940-8924 to order CURT custom fit vehicle wiring part number C56038 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.
  • All Info
  • Reviews (217)
  • Q & A (0)
  • Photos

CURT Custom Fit Vehicle Wiring - C56038

  • Custom Fit
  • Trailer Hitch Wiring
  • 4 Flat
  • Powered Converter
  • CURT

Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. Connector plugs directly into existing wiring - no cutting, splicing or tapping required. Converter is made using SMT to ensure superior performance.


Features:

  • Provides a 4-way flat trailer connector at the back of your vehicle to power your trailer's signal lights
    • Compatible with 5-pole, 6-pole and 7-pole adapters (sold separately)
  • Connects quickly and easily - no cutting or splicing of wires
    • Locate connection point in rear cargo area
    • Plug in connector
  • Includes a tail light converter to ensure that your vehicle's wiring matches that of your trailer
  • Constructed using surface-mount technology (SMT) for consistent, reliable performance
    • Maximizes trailer light yield and intensity while producing minimal heat
    • Ensures superior operation in rough road conditions
  • Comes with dust cap for 4-way flat connector


Specs:

  • Maximum amperage:
    • Stop/turn lights: 3 amps per circuit
    • Tail lights: 6 amps per circuit
  • Limited 1-year warranty


Installation

This custom-fit T-connector plugs into your vehicle's wiring harness, which is located behind the driver's-side interior trim panel in your rear cargo area.


Once installation is complete, the 4-way connector will be stowed in an out-of-the-way location within your cargo area.


It is recommended that you use a small amount of grease on all electrical connections - the plug on your automobile and the 4-pole connector itself - to help prevent corrosion.


Tail Light Converter with Surface-Mount Technology

A tail light converter is built into this T-connector. Because most trailers run on a two-wire system - wherein the brake and turn signals are carried on one wire - the separate brake and turn signals from your vehicle's three-wire system need to be combined so they are compatible with the wiring system of the trailer. This converter combines the brake and turn signal functions of your automobile so that they run on one wire to properly activate your trailer's tail lights. Note: This will not affect how the tail lights on your vehicle operate.


Curt builds each tail light converter using surface-mount technology (SMT). This method of construction involves soldering electronic components directly to the surface of a printed circuit board. SMT eliminates the need for leads, which are used in older through-hole technology. The result is a circuit board that is smaller yet provides more routing area and that offers superior performance, reliability and durability.


Curt SMT Circuit Boards

Circuit boards constructed using SMT have been shown to perform better under rough conditions with excessive vibration than those made using the through-hole method. And where would vibration be more likely to occur than in towing applications? Curt converters also produce less heat, leading to increased durability and longer life. In addition, lower levels of resistance ensure better performance, especially for parts that operate at higher frequencies.


Each Curt circuit board is made using high-quality components that are pieced together in the most technologically savvy fashion, leading to greater predictability and reliability in functioning.



56038 CURT T-Connector - Surface Mount Technology - 4 Wire

Installation Details C56038 Installation instructions

This Product Fits The Following Vehicles



California residents: click here


Customer Satisfaction Score:


Customer Reviews

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - C56038

Average Customer Rating:  4.9 out of 5 stars   (217 Customer Reviews)

Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. Connector plugs directly into existing wiring - no cutting, splicing or tapping required. Converter is made using SMT to ensure superior performance.

by:

The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector, performed as promised. Thanks



by:

Easy to install. Loved the plug-and-play harness.



by:
2009 Acura MDX

Worked great for my 2009 acura mdx



by:

Easy install and good directions



by:
2012 Acura MDX

Very easy install—no need to buy a more expensive harness. I ran it through the jack compartment to the panel on the left rear where it simply plugs in and I attached the ground to the lower existing bolt with the existing nut. Simple as that. The cover for the panel where it plugs in pulls off from the top with the help of a flat screwdriver. The instructions are very thorough.



by:
2011 Acura MDX

worked the first time because I read the other reviews and watched the videos (don't forget the fuse!)- the one thing I wish was a video on how to fish the wire under the car so I don't have to run it out the back door each time.



by:
2013 Acura MDX

So far the product does not work correctly and initial fix did not work. I am awaiting a call back from technical support to discuss the issue more in detail. I think there is something wrong with the harness. The installation is very easy and straightforward but my results are not good. Turn signal connections have power all the time and should not but they seem to work correctly when you simultaneously apply the brake. This would indicate the turn signals only work correctly when the brake is applied. I hope to hear back from etrailer sometime soon as I may miss my time window to get this working. A correct working harness would get 5 stars. Will update review if I get this issue fixed.



by:
2012 Acura MDX

Very happy with the quality and straight forward installation. Hitch and lighting work great.



by:
2008 Acura MDX

I made a mistake on my previous review. I wasn't paying attention. The installation on this was a breeze. Decent instructions, although they were hardly needed.



by:

Easy Install. Use the factory grommets in the floor and rear body to run the wiring to make it look like factory. Use the videos on their [online] page for guidance.



by:
2008 Acura MDX

Easy install for '08 Acura MDX.



by:

Easy to installed highly recommended for novice installer and dont forget to put the fuse in also



by:
Acura MDX

2011 Acura MDX
Easy to install; works
as promised



by:
Acura MDX

Etrailer rocks like a young Mick Jagger.

I
received my Acura MDX trailer hitch and wiring in less than 24 hours...despite the fact that it was supposed to be about 6 days ground.

online videos and great construction made installation a snap.

I will buy from Etrailer time and again

Jtw

12/18/2014

Weve put many miles on our Acura MDX trailer tow package from ETrailer and the whole rig right down to the wiring has performed flawlessly.



by:
2011 Acura MDX

I have ordered several thing from eTrailer over the last few years and have been very satisfied. Everything I buy seems to ship immediately (usually same day) and arrives as ordered a few days later. Their installation instructions and videos are always spot on and have been very helpful. I haven't yet installed the wiring kit I just received but have no doubt it will work well and the instructions will be spot on.

Marshall

7/5/2016

Installation was simple. Only took a few minutes and with the video instructions you can go wrong.



by:
2011 Acura MDX

I've always gotten quality products from etrailer and the Curt line maintains that tradition. The receiver and wiring harness for my MDX are top quality, were really easy to install after watching the videos and saved me hundreds of dollars over the Acura branded parts.

Jim H.

1/18/2016

After a year Im still very pleased with my receiver and wiring. I use the receiver at least weekly for a Thule bike rack, but the wiring harness only rarely.



by:

Installation was straightforward as the videos indicated. Trailer hitch looks and works great. I am very happy with this purchase.



by:

I installed the wiring harness, but to my disappointment it didn't work. When I was gathering up the parts and tools, I noticed that there was a red fuse in the plastic bag of accessories. I checked the controller and found there was a fuse holder on the power line. When I opened it up, lo and behold, no fuse. Installing the fuse fixed the problem and the lights then worked perfectly. If you look at the picture of the harness, you will not see the fuse holder, and the installation instructions never mention it. I'm sure the fuse was a product improvement, but the installation instructions should be updated to mention it.

Sam N.

3/16/2015

I had the same problem. I had to watch the video on the website. The instructions included with the harness provide almost no help. Once I put in the fuse, the harness works fine. Also, the harness does not come with the pictured dust cover. Etrailer customer service is great and sent me a dust cover at no charge.



by:

Product (trailer wiring) was delivered yesterday and installed after dinner the same evening. The install video on your website was a tremendous help, and I surly appreciate the knowhow of your installers. Took my time, was careful and it went smooth - anxious to test this coming weekend but I don't foresee any issues.

John H.

5/21/2020

Still working great after a year of infrequent use but good to have.



by:

Everything worked well. The wiring harness was easily installed as was the hitch receiver. Both have served me well the past year. Thanks etrailer.

Mike

10/29/2018

George, the wiring worker well. Everything fit as promised. Thanks



by:

I bought a trailer hitch and wiring harness and everything worked out exactly like the sales person said for a great price.

Tow H.

7/8/2016

All good thanks for the follow up!!



by:
Acura

I've not yet installed the item. It appears to be and function as stated. It is priced right and was delivered in a normal time frame. I am awaiting resolution with Acura of a issue that developed with the original connector a third party supplied the dealer with before I change out and lkinstall the new connector

Mike

10/29/2018

Although Ive not had a opportunity to use the harness, it meter check out.



by:
2009 Acura MDX

Wow. Super fast shipping, and a great product, as usual. You are my go-to source for hitches and wiring.

Mikecrowley

1/2/2019

Both products are awesome. Perfect fit harness and even better hitch that is very heavily built. Love them.



by:
2008 Acura MDX

As always with etrailer, product alternatives were broad, selection and ordering a snap. Product arrived on schedule as promised, though UPS did manage to insert a few extra holes in the box. No damage to product beyond scratches in powder coat.
Installation this weekend.

John O.

5/17/2018

The install still looks and works great.



by:

Buying from retailer was a snap. I researched this purchase for a while. etrailer had the best prices and was loaded with information. Hitch and wiring arrived quickly and as described. Having watched the videos on their website installation was a breeze. I would not hesitate to order from here again.


25
217
Show More Reviews

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

  • Trailer Wiring and Transmission Cooler Recommendation for a 2008 Acura MDX
    The wiring kit I would recommend you use on your 2008 Acura MDX would be the Curt Custom Fit Vehicle Wiring # C56038. This product will plug into your vehicle and will operate the brake lights and turn signals of your trailer, check out the installation instructions I attached. I would recommend you get a supplemental transmission cooler for your vehicle if you plan on towing. The factory transmission cooler is often adequate at best for non-towing situations, so a supplemental cooler...
    view full answer...
  • Recommended Trailer Hitch and Ball Mount for 2012 Acura MDX
    I have a great solution for you. First for a trailer hitch, The Curt Class III Round Tube Receiver Hitch # 13354 is a great option. No drilling will be required during installation, however keep in mind that the heat shields will need to be removed and reinstalled. This 2 inch hitch opening will provide a 400 pound tongue weight capacity and 4,000 pound towing capacity, although you will also want to check the vehicle's capacities as listed in the owner's manual. I have attached an installation...
    view full answer...
  • Curt Trailer Hitch Recommendation for a 2009 Acura MDX
    For the reasons you listed the Curt hitch part # 13354 that you referenced is our best selling hitch for the 2009 Acura MDX. Especially since you can keep a full sized spare unlike the other hitches that only let you use a mini spare. This is the hitch I would recommend for you and for anyone with your vehicle. For trailer wiring I would recommend the Curt Trailer Wiring Harness part # C56038. Install video attached. For ball mounts I recommend the etrailer Ball Mount Kit # 989900. It...
    view full answer...
  • Recommendation for 2009 Acura MDX Trailer Wiring Harness and Brake Controller
    For your 2009 Acura MDX you will start with a 4-way trailer connector if you don't already have one. I recommend the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118424 which plugs into the factory wiring harness located behind the trim panel on the driver's side. I've attached a video to assist. This harness has a slightly better reputation than the Curt # C56038 which is also a fit. Then I recommend using the brake controller wiring kit # ETBC7 which will give...
    view full answer...
  • Trailer Hitch and Wiring for a 2012 Acura MDX Towing a PWC Trailer
    Curt trailer hitch # 13354 and wiring harness # C56038 will work great on your 2012 Acura MDX. In addition to these parts I also recommend etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with a 3/4 inch rise or 2 inch drop and one with a 2-3/4 inch rise or 4 inch drop. It also includes a 1-7/8 inch ball, 2 inch ball, hitch pin with clip, and a storage bag. If the ball mount kit does not have the right rise or drop to tow the trailer level, use the link I have included...
    view full answer...
  • 7-Way Adapter Recommendation for Curt 4-Way C56038
    Now if your trailer does not have brakes all you would need is the part # 37185 as an adapter to convert the 4-way to a 7-way. If you do have trailer brakes you would need the # ETBC7 instead of the # 37185 and a brake controller. This kit comes with everything needed to wire up the 7-way and install a brake controller. For a brake controller I would recommend the Prodigy P2 Brake Controller part # 90885. This is our best selling brake controller because of how well it works and how...
    view full answer...
  • Trailer Hitch and Wiring Recommendation for a 2013 Acura MDX
    We have everything you would need to tow a small trailer with your 2013 Acura MDX. First let's start with a hitch. For that the Curt part # 13354 is the most popular option and would work well so we would recommend it for you. I attached an install video for this product for you to check out as well. Since you wanted to do some towing you might be interested in etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with a 3/4 inch rise or 2 inch drop and one with a 2-3/4 inch...
    view full answer...
  • Part Needed to Convert 4-Pole Wiring on 2008 Acura MDX to 7-Way Type Trailer Connector
    I didn't find any order history for wiring for your 2008 Acura MDX but if you do have a 4-pole kit installed such as one of the compatible items like # C56038 shown on the linked page then we sure can help you with upgrading that wiring format to the 7-way type like # HM40975-11998. The one item you will use is our 7-Way install kit # ETBC7. This all-inclusive kit has everything you need, from the 7-way socket to the wiring, connectors and circuit breakers. This will give you a fully-functioning...
    view full answer...
  • Adding a 5-Way Flat Trailer Connector to a 2011 Acura MDX
    All of the trailer wiring harnesses for the 2011 Acura MDX have 4-Way flat connectors. In order to have a functioning 5-Way you would first install a 4-Way such as # C56038, # 118424, or # HM11143275 (they all install the same way) and then use a 4- to 5-Way adapter, # 20036, like you said. I have linked some videos to help with installation.
    view full answer...
  • Trailer Wiring Harnesses for a 2012 Acura MDX
    Yes, we do have the Tow Ready trailer wiring harness, # 118424, listed as a fit for a 2012 Acura MDX. You can also use Curt wiring harness # C56038. I have included a link to the installation instructions and a video showing a typical installation of the Tow Ready harness for you.
    view full answer...
  • Will the Curt T-Connector Trailer Wiring Harness Work on a 2010 Acura MDX
    The Curt T-Connector, item # C56038, is compatible with your 2010 Acura MDX. The harness plugs into a connctor behind a trim panel in your rear cargo area. A mounting bracket, item # 18144, can be used if the trailer connector is routed outside of the vehicle permanently. A No-Drill Mount Bracket, Short, item # 18140, provides an easy no drill installation option. The Curt Circuit Protected Powered Converter w/ SMT, item # 56146, is designed with surface mount technology which is a software...
    view full answer...
  • Electrical Needed For Towing a Coleman Pop-up With 7-Way Behind a 2011 Acura MDX
    The 4-Way # C56038 is going to need to be combined with the 7-Way Kit # ETBC7 you found to be able to tow your Coleman pop-up behind your 2011 Acura MDX. While we do not have a single kit for a 7-way the 4-way ties into the wiring for the brake lights, turn signals and running lights. Then the 7-way kit you found will provide the wiring for a charge line as well as a brake controller like the Redarc Liberty # RED52VR. I personally prefer this type of controller for your Acura as it only...
    view full answer...
  • Tail Light Kit for a Curt Trailer Hitch Mount Cargo Carrier on a 2009 Acura MDX
    Since there is no specific light kit that will fit the Curt carrier # C18132 what you will need to do is use a light kit like # 20174, and then add 2 brackets, # BK70BB. You will also need some self-tapping screws # 101131802, or drill and use the hardware of your choice to mount the brackets. Also, make sure that your MDX has a 4-Way trailer connector to plug the light kit into. If you need to add trailer wiring, use a # C56038 that you referenced. If you wanted an LED option you could...
    view full answer...
  • Tail Light Kit for a Curt Trailer Hitch Mount Cargo Carrier
    Since there is no specific light kit that will fit the Curt carrier # C18153 what you will need to do is use a light kit like # 98174LED, and then add 2 brackets, # BK70BB. You will also need some self-tapping screws # FA1131822, or drill and use the hardware of your choice to mount the brackets. Also, make sure that your MDX has a 4-Way trailer connector to plug the light kit into. If you need to add trailer wiring, use # 118424 or # C56038.
    view full answer...
  • Trailer Hitch and Wiring for 2013 Acura MDX
    The Curt 2-inch Class III hitch # 13354 is compatible with the smaller "donut" size spare tire but not a full-size spare tire on your 2013 Acura MDX. Both this and the Draw-Tite hitch option # 75614 are incompatible with the full-size spare. All hitches we offer include the required mounting hardware and written instructions; no other parts are needed for installation. The linked instructions also detail the specific tools required for installation. For a wiring harness you can use Curt...
    view full answer...
  • Transporting 2 Hobie Mirage Outbacks with 2011 Acura MDX
    The Hobie Outback you have weighs in at 85 lbs so it would be harder to get onto the roof of a vehicle even if you had a roof rack and roof capacity that would accommodate 170 lbs of just kayaks. We don't carry any roof racks for your vehicle that would have enough weight capacity so best option is a kayak trailer like the Malone MegaSport Trailer with MegaWing Kayak Cradles # MPG550-M. You'll need a trailer hitch installed on your 2011 Acura MDX as well like the # 13354. For trailer wiring...
    view full answer...
  • Troubleshooting 4-Pole Installation in 2007 Acura MDX Towing Pop-Up Camper Trailer
    If two separate wiring harnesses installed in your 2007 Acura MDX have both failed after being connected to the same trailer, then I suggest you carefully check the trailer for problems like shorts and damaged insulation in its wiring. This type of harness is intended to take the hit from such a trailer fault rather than allow it to damage the car's delicate (and costly-to-replace) internal wiring. A new trailer harness is a lot cheaper and easier to install than new vehicle wiring, but...
    view full answer...
  • Recommended Trailer Wiring Adapter To Connect 2002 Jayco Popup To 2009 Acura MDX
    Using adapters as you described can introduce problems if the everything is not perfectly matched and can cause problems like you are experiencing. My first recommendation is to use a circuit tester like part # PTW2993 and test the 4-way adapter on your Acura. Have someone sit in the front of the vehicle and run through the functions. If everything checks out okay, you can go from there. You can then use a 6-way square adapter like part # 37995. I have attached a photo of the vehicle...
    view full answer...
    Image 1 for
  • Hitch Recommendation for a 2007 Acura MDX
    The Curt Hitch part # 13354 is the correct hitch for your 2007 Acura MDX. The best way I could recommend you get this would be to hit the add to cart button and order it from us! I attached an install video for you to check out as well. For trailer wiring you would want the part # C56038. For ball mounts I recommend the etrailer Ball Mount Kit # 989900. It comes with 2 ball mounts, 2 balls, a hitch pin with clip, and a carrying bag.
    view full answer...
  • Hitch Recommendation for a 2009 Acura MDX
    For your 2009 Acura MDX you would want the Curt Hitch part # 13354. This hitch will fit all models of the 2009 MDX so it will work for you regardless of your current rear fascia. Check out the install video I attached for more info. If you plan on doing some towing you might be interested in etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with a 3/4 inch rise or 2 inch drop and one with a 2-3/4 inch rise or 4 inch drop. It also includes a 1-7/8 inch ball, 2 inch ball,...
    view full answer...
  • Providing a Maintenance Charge to a Trailer Mounted Battery on Trailer Towed by 2010 Acura MDX
    In order to provide a maintenance charge to a trailer mounted battery you would need to have a trailer connector on the vehicle that has a 12 volt circuit. A 4-Way flat, like what is on harness # C56038, only has the basic lighting functions. But you can add a 7-Way trailer connector and keep the 4-Way in place. You would need adapter # 37185, a 40 amp circuit breaker, # PK54540, and about 25 feet of wire # 10-1-1. Put 25 in the quantity box to get 25 feet. The 4-Way you have will plug...
    view full answer...
  • 2013 Acura MDX 4-Way plug Troubleshooting
    The first thing I would do is test the trailer against another vehicle with a known working 4-way plug. The issue could be on the trailer side wiring. If this is the case let me know what you have and I can recommend a solution. Second I would check to see if it is only limited to the trailer or did the vehicles lights stop working as well. We do carry a Circuit Tester # PTW2993 that can help you diagnose the plug and wiring. See attached video. If the trailer worked on the other vehicle...
    view full answer...
  • 4-Way and 7-Way Trailer Wiring Recommendation for a 2009 Acura MDX
    The Curt trailer wiring harness part # C56038 has been confirmed as a fit for your 2009 Acura MDX and does include the needed harnesses and relays for it to plug right into your vehicle's wiring. We do not sell a version of this that also provides a 7-way, but if you are towing a trailer with surge brakes most likely you wouldn't need a 7-way. If you really do want a plug in version that has both the 7-way and 4-way active then the dealer option would be the way to go. Otherwise you would...
    view full answer...
  • Recommendations for Towing a Small Camper With a 2012 Acura MDX
    You have found some great choices yourself. The Draw-Tite # 75614 is the perfect hitch for your 2012 Acura MDX. It is custom fit and requires no drilling. It will not allow you to carry a full size spare tire if you do have one. The Vehicle Wiring Harness with 4-Pole # C56038 is also the correct harness for your vehicle and will plug into the OEM wiring. We have great videos below on the installation of both of these. For the 7-Way plug use Universal Installation Kit # ETBC7. The 4-Way...
    view full answer...


< Previous
12



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


Info for this part was:

Employee Sarah L
Expert Research:
Sarah L
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Jeffrey L
Expert Research:
Jeffrey L
Employee Joshua S
Video by:
Joshua S
Employee Patrick B
Video by:
Patrick B
Employee Alan C
Video by:
Alan C
Employee Zach D
Video by:
Zach D
Employee Nicholas E
Test Fit:
Nicholas E
Employee Rick A
Test Fit:
Rick A
Employee Shane T
Test Fit:
Shane T
Employee Joe B
Test Fit:
Joe B
Employee Brent H
Test Fit:
Brent H
Employee David F
Test Fit:
David F
Employee Jacob T
Video Edited:
Jacob T
Employee Sue W
Video Edited:
Sue W
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

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.