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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 # C56158
Our Price: $40.09
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Custom Fit Vehicle Wiring

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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 is made using SMT to ensure superior performance. 1-833-496-1390 to order CURT custom fit vehicle wiring part number C56158 or order online at Free expert support on all CURT products. Guaranteed Lowest Price 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 (588)
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CURT Custom Fit Vehicle Wiring - C56158

  • 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. T-connector plugs directly into existing wiring. Powered converter is made using SMT to ensure superior performance.


  • 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
    • Locate connection points in rear cargo area
    • Plug in T-connector
  • Includes a tail light converter to ensure that your vehicle's wiring matches that of your trailer
    • Powered module pulls power directly from battery to avoid overloading vehicle's electrical system
  • 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


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


This custom-fit T-connector plugs into your vehicle's wiring harness, which is located in your rear cargo area. You will have to remove the rear scuff panel and additional trim to access this harness.

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 plugs 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.

56158 CURT T-Connector Vehicle Wiring Harness with 4 Pole Trailer Connector

Installation Details C56158 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 - C56158

Average Customer Rating:  4.8 out of 5 stars   (588 Customer Reviews)

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 is made using SMT to ensure superior performance.


Easy install plug and play. Recommend e

2012 Honda CR-V

I am still very happy a year out. I was able to easily install the Curt trailer hitch on my 2012 Honda CR-V all by myself. This is the second time that I've purchased a hitch from etrailer and it was an excellent expeirience both times. The product came well-packaged with no parts missing and instructions. The also provided links to ibstructional videos so you can literally follow along as you watch someone guide you. I use my hitch to tow a small 6x4 ft. trailer full of fire wood, leaves, dirt, furniture, and anything else that will fit. Etrailer will be my top consideration anytime I am on the market for vehicle accessories. Great products. Great customer service. Great Company.

Still working great! No problems with the wiring at all!
Howie P - 04/26/2017


Still working great after a year. This harness was easy to install on my 2016 Honda CRV. The installation video on the product's page was particularly helpful. Will come to etrailer for may next one.

2016 Honda CR-V

The included instructions for taking apart the plastic trim panels inside the car are grossly inadequate. Fortunately, YouTube had a car and year specific set of instructions for my particular wiring harness adapter that was spot on. It doesn't say as much in the instructions, but the project would benefit from a specialized trim-clip removal tool. Without it, you're going to break some proprietary plastic clips.


I’ve had the harness about a year and have no complaints. It works great for my 2016 Honda CR-V.

2012 Honda CR-V

Price works great I installed it myself and yes I am a woman, I watch the video and everything went just as it should have I save myself $500 not having a trailer hitch and the wiring done and doing it myself. Thank you so much e trailers

Great! We use the hitch for an electric wheelchair for my 90 year old dad. I’m the one that has to hookup it all on my own. Couldn’t be more pleased with the fit. Thanks for being a great company via the internet. Carolyn a loyal customer
Carolyn - 12/17/2020

2015 Honda CR-V

Nice harness worked fine after install, it was nice that I didn't have to cut into any wires pretty much plug n play.


I wired it to the outside of the Crv so I didn't have to open the hatch every time I wanted to pull my trailer. First I cut the trailer plug off a foot from the plug and ran the wires through the grommet in the photo. I had already cut a hole in the underbody and this grommet lead right to this hole. Then I reattached the trailer plug to the wires with shrink wrap connectors and ran the plug right above the hitch. Very clean install and setup I really like it.


Works great and easy to install.
complete and on time.

Works as well as when it was installed. No issues.
Desmond - 08/10/2022


The hitch was a perfect fit for the CRV. I used [online] videos to install the hitch, and it went on easily. Great product.


Product works great, but requires a bit of time to install - mostly due to trim panel removal and replacement. I think it's worth the extra effort to install diodes, because they are very convenient once installed.

2015 Honda CR-V

The trailer hitch and wiring harness arrived in 2 days, which was much quicker than I expected. The installation went smoothly thanks to the detailed instructional videos on Great products, prices, and service. Thank you

2015 Honda CR-V

Here is the final finish of the Curt "T" connector. Wired to my Hidden Hitch I purchased. Ordered a separate bracket to house the four pin plug to give it a cleaner look. Easy to install and looks amazing. Can't wait to try it out.

Honda CR-V

Very nice and well made trailer hitch wiring harness for my Honda CRV. Brake, tail lights, turn signal lights tested perfect first try. Cover for plug keeps contact points clean when not in use.


Thank you for such an awesome experience! Never done this before and watching your video made it really easy to install. My jack had broken so I had to do it from the floor. A little tough but managed without any help. Also, The wiring was cake as well. Perfect demonstration and walkthrough on your video(s). You asked for the pics so I shot a few for you. I've never had a vehicle with a tow hitch so my next goal is a trailer. gotta save for that one :(

Well, once again I want to thank you, guys!

2016 Honda CR-V

Routed the wiring harness through the existing grommet behind the left interior wall panel and then out the existing hold at the bottom of the protective cover.

Love the installation videos! Made installation a snap.

2014 Honda CR-V

EZ PZ wiring install.
The real trick
is removing plastic push pins and panels without damage but that has nothing to do with etrailer it's just how our cars are made today.
Maybe a brief how to with tips on how to work with auto panels & push pins would help?

For your 2014 Honda CR-V fasteners, you can use a flat head screw driver to push down on the center and then they will pop loose. You can pull back the weather strip and use a plastic pry bar to pop out the panel. For a visual, you can watch the attached video starting at the :30 second mark:
-- Etrailer Expert Sierra K - 10/25/2021

2015 Honda CR-V

Kit fit as described. Struggled to get the black rear panel back on as others had mentioned. Tough to get that gap out as it separates from the other piece near the rear seat. I did stick my connector to come out this hole as in pic below. Sticky tape fell off both sides despite wiping though. Used gorilla glue to help and otherwise all was fine. I'm a novice and it is do-able.


Exceptional service. Fast delivery. Another retailer failed to install a towing wiring harness so I found this product which was exactly what I needed. It came with videos and instructions that made it incredibly easy to install myself.


Trouble free installation. Thank you because I'm not an electrician.


An excellent price and the fit for my Honda CRV was precise. It came with clear instructions and was pretty easy installation. That includes both the hitch and the electrical connections. I use primarily for a bike rake, and like having the option to pull a small trailer.


Just opened today..looks excellent.....having it installed next week...price was excellent for hitch and harness!!


Very pleased with the product. My husband was able to install it in about 2 hours. Very good fit and finish.

2012 Honda CR-V

Thanks Etrailer. Installation was easy. They also upgraded my shipping so I received it in a few days.

2015 Honda CR-V

Installation of the wiring harness was a 'snap'...just a little bit of pain getting the removed plastic panels back in place.

Show More Reviews

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

  • Trailer Wiring Harness on a 2012 to 2014 Honda CR-V Does Not Work After Installation
    First you will want to make sure that the small fuse included with wiring harness # C56158 is installed in the correct location. The small fuse is supposed to go into location 10 in the fuse panel under the dash. Check to make sure the fuse is not blown. The larger fuse needs to be installed in the fuse holder attached to the harness. Check it too to see if it is blown. And finally, check the white ground wire. If it is at a shared ground location or the surface it is attached to is not...
    view full answer...
  • Does Negative Battery Cable have to be Removed to Install Trailer Wiring on 2014 Honda CR-V
    The instructions for Curt trailer wiring harness # C56158 do not require disconnecting the negative battery cable to install the harness on your 2014 Honda CR-V. I have linked the instructions for you as well as a video showing installation.
    view full answer...
  • Will the Curt Wiring Harness for a 2013 Honda CR-V Void the Vehicle Warranty
    If installed properly the Curt Wiring Harness part # C56158 that you referenced shouldn't cause any problems. Your best course of action would be to go back to the local installer you used and explain to them what happened as it sounds like the screwed something up. Consumers of aftermarket products are protected by the Federal Magnusson-Moss Warranty Act. You should bring this up with your Honda dealer if you decide to go back there with the problem you have. The Act states that if...
    view full answer...
  • Is 10 Amp Fuse Rating Correct When Installing Trailer Wiring in 2016 Honda CRV
    Curt extensively tested the fuse rating needed when installing their # C56158 in your 2016 Honda CR-V and they determined that 10 amps was the correct rating to go with. With as many as these as we have sold we would have heard by now if there was an issue as well so using the 10 amp fuse will be totally fine. I attached an install video link for this kit on a 2016 CR-V just like yours for you to check out as well.
    view full answer...
  • Help Finding Install Connector for Trailer Wiring for 2015 Honda CR-V
    Typically when we see this issue with trailer wiring installs it's that the wrong connectors were found on the vehicle and the solution is to look further on the vehicle. The best help I can provide is to check out the install video I attached for this harness # C56158 on a 2015 CR-V that will walk you through the whole process.
    view full answer...
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  • Will Tow Bar Wiring for 2013 Honda CR-V Affect Trailer Wiring
    The install of the Curt trailer wiring harness part # C56158 will not interfere with the tow bar wiring you have installed on your 2013 Honda CR-V. People very frequently have both types of wiring kits installed without any issue.
    view full answer...
  • Where is Blue Connector When Installing Wiring Harness on 2012 Honda CR-V
    I'm not quite sure what to tell you here except that the blue connector will be there when installing the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56158 on your 2012 Honda CR-V. Sometimes these connectors can be pretty hidden away, especially on older vehicles where it may have dropped down a bit, so you will need to dig down a bit deeper than what it shows in the linked installation video. It will be behind the driver's side panel in the cargo area...
    view full answer...
    Image 1 for
  • Troubleshooting Installation of Curt Wiring Harness on 2015 Honda CR-V EX-L
    My contact at Curt Tech said their harness # C56158 is a fit for your vehicle. He said that some later model vehicles had a second blue connector that had the wire you are seeking, so you may want to grab a flashlight and see if there is another blue connector. He also said to make sure your fuse is in the correct location in your box. I've attached a video as well as their installation instructions to help further. If you need further help, let me know.
    view full answer...
  • How to Remove Side Panel Hooks when Installing the Curt T-Connector # C56158 on a 2013 Honda CR-V
    I believe the place where you are stuck at for installing the Curt T-Connector # C56158 on your 2013 Honda CR-V is addressed by the installer at mark 0:35 in the attached installation video. When our installation team member installed this same T-Connector on a similar 2013 CR-V he noted: "To remove some of the tabs on the interior panel you will need to push the center of them and they will be able to pulled out once the center is pushed in." If you watch the rest of the installation...
    view full answer...
  • Curt Trailer Wiring Install Video for a 2015 Honda CR-V
    I checked your order notes and it looks like you ordered the Curt trailer wiring harness part # C56158 which has been confirmed as a fit for your 2015 Honda CR-V. To see how it installs check out the install video that will walk you through then entire process on a 2015 Honda CR-V just like yours. I also attached a link to the install instructions. Basically you will remove some interior panels in the rear of the vehicle and you will find the correct connector to use.
    view full answer...
  • Installing Curt T-Connector Vehicle Wiring Harness on 2015 Honda CR-V
    To install the Curt T-Connector Vehicle Wiring Harness # C56158, the white connectors will plug into your vehicle's existing factory wiring connectors. The connectors you will want to access are behind the driver's side rear access panel in the cargo area. Once you have access behind the rear trim panel, you will want to find the connectors for the vehicle taillight wiring. Typically these connectors are blue, but they may be a different color in your vehicle. The taillight wiring connectors...
    view full answer...
    Image 1 for Image 2 for
  • Troubleshooting No Power on Trailer Wiring Harness after Install on 2011 Honda CR-V
    Sounds like the fuse of the red fuse holder isn't installed in the harness to activate it. Without this the entire harness will not have power. There is also another fuse that needs to get installed under the dash. It is a 10 amp fuse that gets installed in position 10 in this fuse block. Check to make sure it is installed properly in the correct location. I attached a picture that shows where it will get installed.
    view full answer...
    Image 1 for
  • Is the Curt Trailer Wiring for a 2012 Honda CR-V Compatible with LED Trailer Taillights
    Yes, the Curt trailer wiring harness part # C56158 that has been confirmed as a fit for your 2012 Honda CR-V is compatible with LED trailer lights. LED lights are great because they don't draw as much amperage as incandescents and they last forever. If anything LEDs will work better than incandescents with this kit. I attached an install video for you to check out as well.
    view full answer...
  • Why Does the Curt T-Connector Wiring Harness C56158 for a 2015 Honda CR-V Come With Two Fuses
    The Curt T-Connector Vehicle Wiring Harness part # C56158 does come with two fuses, one that gets installed inline with the harness that protects the converter and then one that gets installed in the interior fuse box that protects the vehicle's wiring.
    view full answer...
  • Where to Install 10 Amp Fuse for Curt T-Connector on 2014 Honda CR-V
    When installing the Curt T-Connector # C56158 on your 2014 Honda CR-V you need to access the fuse panel under your dash and put the 10 amp fuse in position 10. I have attached a photo showing this as well as an installation video that you can check out.
    view full answer...
    Image 1 for
  • Installing the Curt Custom-Fit Wiring Harness # C56158 on a 2015 Honda CR-V
    The Curt T-Connector Vehicle Wring Harness, # C56158, is designed to bypass pulling electric from your 2015 Honda CR-V's lighting wiring and get power directly from the vehicle's battery. The T-Connector harness includes a powered light converter that senses when the vehicle's lights are in use and then pulls electricity from the battery to send this signal to the trailer lights. The converter will take the stress off of your vehicle's lighting circuit and the extra fuse is wired on the...
    view full answer...
  • Is a 10 amp Mini Low Profile Fuse Included with the Curt T-Connector # C56158
    Yes, there are 2 fuses that come with the Curt T-Connector # C56158 for a 2012 - 2016 Honda CR-V. The larger fuse is placed in the red fuse holder while the smaller 10 amp low profile mini fuse is placed into the fuse panel in position 10 (which you see in the provided picture). If you purchased the unit through us please let me know. Otherwise, you should be able to acquire one of these fuses at your local hardware, home improvement, or auto parts store.
    view full answer...
    Image 1 for Image 2 for
  • No Power to 4-Way on a 2013 Honda CR-V with Curt Wiring Harness
    The first thing you are going to want to do is take a circuit tester and test the red wire just before it enters the converter box. If you do not have power here then test this wire again just before the fuse holder. If still no power then there is most likely an issue in the vehicle's tow package wiring and you will need to take it into the dealer to have it troubleshooted. If you have power just before the fuse holder then replace the fuse. If you have power just before the converter...
    view full answer...
  • Comparing Tow Ready and Curt Trailer Wiring Harnesses for a 2012 Honda CR-V
    The Tow Ready harness # 118561 is the more popular option for the 2012 Honda CR-V. However, you cannot really go wrong with it or Curt harness # C56158. Both harnesses use an updated converter box so you will be getting the newest technology with either one. Both harnesses are circuit protected and come with everything needed to make the wiring functional. Given such strong similarities I do not favor one more so than the other but if it were me, I would go with the Tow Ready harness...
    view full answer...
  • Finding the Tail Light Wiring Connectors to Install Trailer Wiring Harness on a 2013 Honda CR-V
    Installation of trailer wiring harness # C56158 on a 2013 Honda CR-V requires pulling back the driver side trim in the rear cargo area. The connectors should be back there but it is possible that they are further down and/or further forward on the vehicle. You should be able to follow the tail light wiring back to where the connectors are.
    view full answer...
  • Troubleshooting Trailer Wiring of 2016 Honda CR-V that Has Voltage on Turn Signal All the Time
    Sounds like you the converter box of the trailer wiring you installed shorted out and and is now in need of being replaced. This is a pretty common problem. If you test for voltage before the converter box and find the correct voltage is making it to the box but not to the output side then the box has been damaged an in need of replacement. For that the most reliable replacement we have would be the Tekonsha kit part # 118561 as we've found their converter boxes to be the most reliable.
    view full answer...
  • Replacing Curt Wiring That Blows Fuses on 2014 Honda CR-V
    Curt does a really good job on the hitch side of things but when it comes to the electronic side of things they are definitely not my first choice simply because we tend to have more issues with their wiring simply giving out like what you experienced than with other brands. For your 2014 Honda CR-V I recommend replacing the Curt # C56158 with the Tekonsha T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118561 because we have found that the Tekonsha wiring tends to be...
    view full answer...
  • Taillight Converter on Trailer Wiring Harness Not Functioning After Short Circuit in Trailer Wiring
    If you've replaced the 10A fuse in the yellow fuse holder where the power wire for the taillight converter of the # 118561 wiring harness attaches to the vehicle battery and you're still not getting any power output to the trailer, then the converter has been blown and the harness will need to be replaced. Some might consider this a bad thing, but look at it this way- the converter did its job and prevented the surge from the short from passing into the vehicle wiring where it could have...
    view full answer...
  • Which Trailer Wiring Harnesses will Fit a 2013 Honda CR-V
    There are two trailer wiring harnesses confirmed to fit your 2013 Honda CR-V. They are the Tekonsha # 118561 and the Curt # C56158. The Tekonsha installs behind the tail lights and the Curt behind trim panels in the rear Cargo area. I have included install videos and install videos for each harness for you to take a look at.
    view full answer...

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