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 # C56349

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Custom Fit Vehicle Wiring

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C56349 - Custom Fit Curt Custom Fit Vehicle Wiring
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  • Custom Fit
  • Trailer Hitch Wiring
  • 4 Flat
  • Curt
  • Powered Converter
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. Call 800-298-8924 to order Curt custom fit vehicle wiring part number C56349 or order online at etrailer.com. 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.


  • All Info
  • Reviews (23)
  • Q & A (20)
  • Videos (1)
  • Photos
  • Why etrailer?

Curt Custom Fit Vehicle Wiring - C56349

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.


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
    • Locate connection points behind tail lights
    • Plug in T-connector
    • Run hot lead to car battery
  • Includes a tail light converter to ensure that your vehicle's wiring matches that of your trailer
    • Powered module connects directly to 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


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 and passenger's side tail lights. You will have to remove the tail light assemblies to access this harness. Once you've plugged in the T-connector, run the hot lead to your car battery. Connect the lead to the included fuse holder, and then connect the fuse holder to the positive terminal on your battery.


Once installation is complete, the 4-way connector will be stowed beneath your vehicle, near the trailer hitch. A mounting bracket (sold separately) is recommended to keep the connector secure.


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.


Powered Tail Light Converter with Surface-Mount Technology

A tail light converter is built into this T-connector. This converter is a circuit-protected, battery-powered unit that bypasses the electrical routes that are used by a basic wiring harness. As a result, there is virtually no draw on your tail light circuits.


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.



56349 Curt T-Connector - Surface Mount Technology - 4 Wire

Replaces 56282



C56349 Installation InstructionsInstallation Details C56349 Installation instructions

This Product Fits The Following Vehicles

2016 - 2019 Toyota Tacoma

2016 - 2019 Toyota Tacoma



California residents: click here


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


Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Curt Custom Fit Vehicle Wiring - Trailer Hitch Wiring - C56349 Review

Speaker 1: Today we're gonna be taking a look at the Curt T-connector vehicle wiring harness with the 4-pole flat trailer connector. This product fits certain years of the Toyota Tacoma. To ensure that this is a fit for your vehicle, you can use the vehicle fit guide located at etrailer.com. It provides a 4-way flat connector at the back of your vehicle to power your trailer's signal lights. This is compatible with 5-pole, 6-pole, and 7-pole adapters. Adapters are sold separately.

It come with a dust cap for the 4-way flat connector. That way, you can cut up the connection points when your plugs not being used. The dust cap is actually tethered to the plug housings. So you don't have to worry about misplacing that or losing that. The black box is the included taillight converter.

This ensures that your vehicle's wiring matches that of your trailers. The powered module connects directly to the vehicle battery through the wiring to avoid overloading the vehicle's electrical system. Now this is constructed using surface mount technology for consistent, reliable performance. So that that does is it maximizes the trailer light yield and intensity while producing minimal heat.It ensures superior operation even in rough road conditions. Now this unit is designed to connect quickly and easily.

All you need to do is locate the connection points behind the taillights then plug in your connectors. One goes to the passenger side then one set goes to the driver's side. Plugs on this harness match up perfectly with the ports on the vehicle. It's a custom fit wiring harness. So it's designed specifically for your vehicle, so they plug and they snap lock together for a nice, tight, secure fit.

Once you have those plugged in, you'll need to make a ground connection. Your ground wire is your white wire with a ring terminal attached to it. You want to get that grounded to a suitable grounding location with the included grounding screw. Then you'll need to mount the converter box to a safe, out-of-the-way location and you can do that using the double sided adhesive film tape that's provided in the kit. Next, you'll need to run the hot lead to the vehicle battery. The hot lead is the short black wire coming out of the box.This gets connected to one end of the bundle with one of the included butt connectors. The other end of the bundle runs to the vehicle battery, gets another butt connector attached to it and connects to one half of the fuse holder. The other half of the fuse holder gets a ring terminal attached to it and gets connected to the positive post of the vehicle battery. It does come with your 10 amp fuse, goes directly in the fuse holder and it's got the cap that goes over to keep it safe and protected. Once you have that done, you can secure any excess or slacking in wiring with the included cable ties. Then once you install is complete, the 4-way connector's gonna be stowed beneath the vehicle near the trailer hitch. We do recommend using a mounting bracket to keep the connector secured and easily accessible. Mounting brackets are sold separately and available at etrailer.com. It's also recommended that you use a small amount of dielectric grease on all your electrical connection, like the plugs on the vehicle and the 4-pole connector itself. That grease is specifically designed to prevent corrosion, to connection points.It's sold separately and available at etrailer.com as well. When it comes to the maximum amperage for the stop and turn light, we're looking at three amps per circuit and for the tail lights, we're looking at six amps per circuit. That's gonna do it for today's look at the Curt T-connector vehicle wiring harness with the 4-pole flat trailer connector.


Customer Reviews

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - C56349

Average Customer Rating:  4.7 out of 5 stars   (23 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 reduces strain on wiring system and is made using SMT to ensure superior performance.

- C56349
by:
2019 Toyota Tacoma

Excellent, easy to install and I got the right one (this was a Christmas gift) thanks to the great customer service at etrailer! 600526



- C56349
by:
2017 Toyota Tacoma

Great product Fits like its suppose to as described Highly recommend 662703



- C56349
by:

Snaking the wire to the vehicle battery was tedious as I don't have a lift. Other than that the installation was straightforward. I haven't connected to a trailer, so I am unable to comment as to whether the lights work. 478176



- C56349
by:
2017 Toyota Tacoma

Does its job, very simple, longest part is running wires and securing with zip ties. Works great! If you watch the video on Etrailer from the older model you get a good idea of how it all goes together it’s only slightly different. 516966



- C56349
by:
2018 Toyota Tacoma

The harness is well built and the connectors fit perfectly into the OEM harness. I routed the power cable through the cab along the original harness and it took about 2 hours for the complete install. Instructions were clear and all the required hardware was provided. Everything worked exactly as it should. Great product, definitely recommended. 555505



- C56349
by:
2016 Toyota Tacoma

This product is totally worth the money!!!! Everything worked the first time .. the install was very easy, only thing that was a little difficult was running the positive cable from the battery to the rear bumber.. just take your time and follow the chassis, that was a big help.. I bought this product to install rear led brake light strip and wanted to hide the cables to give it a oem look.. would definitely recommend this product! 552694



- C56349
by:
Toyota Tacoma

Fit Tacoma perfectly. Installed power converter behind tail light housing——plenty of room and out of the elements. 695362



- C56349
by:
2016 Toyota Tacoma

Worked great! Install took about a hour. I ran the wires as high off the ground as possible. In my 2016 Tacoma with no tow package I have to turn on the lights then turn the lm off and on again to get the power to the trailer. 683636



- C56349
by:

installed in about one hour. Works fin e. 682924



- C56349
by:

Good product,however,I had to drill a mounting hole near the tailight because the two sided tape shook loose and caused the first one I bought to fail. 669361



- C56349
by:

Quick easy install !! 614765



- C56349
by:
2016 Toyota Tacoma

Easy install ! 589252



- C56349
by:
2017 Toyota Tacoma

Harness works great and was easy to ins tall. 573794



- C56349
by:
2018 Toyota Tacoma

Perfect fit.easy to install.always great products from etrailer 561725


Comments

Fantastic

Julian - 09/05/2019

60821

- C56349
by:

Harness was great the only issue I had was the instructions included were kind of lacking. I would recommend watching the installation for the t-one version of this harness, I could not find a video for the installation of the curt. 557541



- C56349
by:

very easy to install 555157



- C56349
by:
2017 Toyota Tacoma

Everything fit perfectly. I would suggest, however, that a step-by-step installation video would be a tremendous help. The printed instructions that come with the wiring kit are a little vague. 509628



- C56349
by:

Good product. Great service and shippin g. 504191



- C56349
by:

Fits great. 444554



- C56349
by:
2017 Toyota Tacoma

The wiring harness is very good. The connectors go between the existing truck harness and the light sockets, making for a very clean installation with no cutting of wires on the truck. 442947



- C56349
by:
Toyota

Just what I needed to get my Toyota fixed up to tow 441731



- C56349
by:
2017 Toyota Tacoma

Nice complete light kit , it took me an hour and a half to install , if I did it again I could cut the time in half , I ended up using an additional 15-20 zip ties keeping the cable tucked up out of harms way , everything else was provided and the instructions were easy to follow . Thanks etrailer 439742



- C56349
by:
2016 Toyota Tacoma

Very happy with my order and quality of parts, it was a very easy install. 439172


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Ask the Experts about this Curt Custom Fit Vehicle Wiring

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


  • 4-Pole Trailer Wiring Harness for 2017 Toyota Tacoma
  • We do offer two choices in a plug-in T-connector 4-pole wiring harness for your 2017 Toyota Tacoma. Both are intended for trucks without the factory tow package. Please note that the term 'tow package' does not always mean the same thing. What is included in a 'tow package' can vary considerably from auto maker to auto maker, between models and even between model years. In our experience a Tacoma will either have a complete wiring set-up with wiring and trailer connector at the back...
    view full answer...

  • Recommended Wiring Harness For 2017 Toyota Tacoma
  • Both wiring harnesses that are confirmed to fit your 2017 Toyota Tacoma require a battery line being added. This is really to protect your wiring system. The powered converter reduces strain on a factory system and protects the system. I know it seems like more work to add a power line to the battery, because it is more work, however the work will give you peace of mind knowing that your converter will function correctly and keep your factory wiring from malfunction which isn't always...
    view full answer...

  • Right Turn Signal/Brake Light Stays On with Curt Trailer Wiring Harness on a 2016 Toyota Tacoma
  • What you are describing sounds like a short in the converter box for Curt wiring harness # C56349 for your 2016 Toyota Tacoma. Since this is the second time this has happened it could indicate that there is something on the trailer that is causing the box to short out so I do recommend inspecting the trailer wiring and fixing any broken or pinched wires or anything else that seems problematic. I also recommend switching to the Tekonsha harness, # 118685, because we hear about less problems...
    view full answer...

  • 4-Way Trailer Connector Recommendation and Ball Mount Kit For 2018 Toyota Tacoma
  • I am happy to help you with the wiring you need to tow your boat with the 2018 Toyota Tacoma. I recommend Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part # C56349 because it is a bit easier to install compared to the other options. It is a 4-way trailer connector to plug in your boat trailer to power the lights. Since you are planning on towing, I recommend etrailer.com ball mount kit part # 989900. It comes with 2 ball mounts; one with a 3/4 inch rise...
    view full answer...

  • Availability of a Trailer Hitch for a 2017 Toyota Tacoma
  • I recommend the Curt Class III Trailer Hitch Receiver, # C13264, This hitch will accepted a 2 x 2 inch ball mount. The Curt hitch is designed to fit your Tacoma and will require no drilling when installing on your vehicle. If you are planning to tow trailer, then you will also need a vehicle wiring harness, like # C56349. This wiring harness will allow you to connect a 4-pole flat connector to your Tacoma. The harness will allow to connect your trailer's light to your vehicle. If...
    view full answer...

  • 2016 Toyota Tacoma TRD Sport 7-Way Recommendation to Fit Bumper Cut Out
  • You are on the right track for sure to install the # HM40975-11998. You would first need to start with a 4-way like part # C56349 and then to convert it to a 7-way you would need to cut off the 4-way of this hardwire and then hardwire it to the part # HM40975-11998.
    view full answer...

  • Recommended Trailer Wiring Harness for a 2017 Toyota Tacoma
  • I do have a plug-in trailer wiring harness that will fit your 2017 Toyota Tacoma but the plug you are referring to is not used for the trailer lights. For your Tacoma, I recommend the Curt T-Connector Vehicle Wiring Harness part # C56349 which actually plugs in behind the taillights as you can see in the attached instructions. This kit will provide you with a 4-way trailer connector. If you need a 7-way trailer connector then in addition to the Curt harness you are also going to need...
    view full answer...

  • Installing Tekonsha Brake Controller on a 2016 Toyota Tacoma Without Factory Tow Package
  • I can help you understand your 2016 Toyota Tacoma a little more and help you install that Tekonsha brake controller. Since your Tacoma doesn't sound like it came with the factory 7-way then you will not have a plug in location for your brake controller like the # 3031-P uses, this is typically part of the upgraded "tow package". The good news is you are off to a good start with the Curt 4-way wiring harness # C56349. We just need to take that connection and adapt it to the 7-way...
    view full answer...

  • Installation of a 7-way Trailer Connector on a 2016 Toyota Tacoma Without the Factory Tow Package
  • Since you do not have the factory tow package on your 2016 Toyota Tacoma, you will first need the 4-way which the # C56349 will give you. To adapt that 4-way into a 7-way you will be able to use the Hopkins # HM40975 and the # HM40985 you mentioned, but I highly recommend the # ETBC7 instead, because it will include all the wires and adapters you will need. I have included a Help Article and install video on the ETBC7 for your convenience. If you would rather stick with the Hopkins...
    view full answer...

  • Trailer Hitch and Wiring for a 2017 Toyota Tacoma
  • Yes, the Draw-Tite trailer hitch # 75238 is a fit for your 2017 Toyota Tacoma. We have determined that the hitch fits from the 2016 Tacoma carry over to the 2017 model year as well. If you plan on doing some towing I 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...
    view full answer...

  • Recommended Brake Controller Plug-In Adapter For Prodigy P2 On 2016 Toyota Tacoma
  • If you have a factory 7-way connector at the back of your 2016 Tacoma the correct brake controller plug-in wiring adapter for your Tacooma is part # 3031-P. This adapter is designed to work with the Tekonsha P2, part # 90885 and plugs into the port located under the dash. If you do not have a factory 7-way connector there will be no port to plug an adapter into and you will need to first install a 4-way connector like part # C56349. You will then need to install part # ETBC7....
    view full answer...

  • Installation Of Brake Controller On 2016 Toyota Tacoma
  • If you have a factory 7-way on your Tacoma, you can easily connect the brake controller by using a plug-in adapter like part # 3031-P. You simply plug one end into the back of the controller and the other end plugs into the brake controller port under the dash. If you do not have a factory trailer connector on your Tacoma you will first need to install a 4-way harness like part # C56349. You just plug this harness into the connection points behind the tail lights, and then run a hot...
    view full answer...

  • Installing a 7-Way Trailer Connector on a 2017 Toyota Tundra with 4-Way Flat Connector
  • Using the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector, # C56349, will provide you with a great start to your 7-way. To connect the Hopkins/Pollak 7-Pole and 4-Pole Connector, # HM40975-11998, to the Curt T-Connector, # C56282, you would have to first cut the green, yellow, and brown wires of the 4-way connector. Then, using the included butt connectors, you would match up the wires on the 4-way and also add the following from the Hopkins connector (Red...
    view full answer...

  • Wiring for Trailer to Match 4-Way on Tow Vehicle
  • If you are installing a 4-Way like the Curt T-Connector # C56349 on your 2016 Toyota Tacoma (that you inserted for your vehicle info) then you need to make sure the wiring on your trailer matches the wiring configuration of this 4-Way (see attached). If you don't already have wiring on your trailer then I recommend using a kit like the Optronics # A35W42B which comes with a 4-Way and 35' of wiring that you'd just run to your lights: White - ground Brown - tail lights Yellow - driver...
    view full answer...

  • Adding a 7-Way Trailer Connector and Brake Controller to a 2016 Toyota Tacoma without Tow Package
  • To install a brake controller on your 2016 Toyota Tacoma you will first need a 4-Way trailer connector # C56349 unless the truck already has one. Then you will need to install # ETBC7 which provides the 7-Way, wiring, and accessories that will be needed to hardwire in the brake controller. I have included the best links that show and explain the ETBC7 installation for you. Since the ETBC7 is a hardwire install on any vehicle you could really watch any of the videos but I chose to link...
    view full answer...

  • Trailer Wiring Harness Fit and Installation on 2016 Toyota Tacoma
  • The Hopkins Wiring Harness 33355 that you referenced used to be a confirmed fit for your Tacoma, but the manufacturer made some changes to the harness and it is no longer a fit for the 2016 Toyota Tacoma. For a trailer wiring harness that is confirmed to fit your 2016 Toyota Tacoma, you will want to use the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56349. This harness will indeed plug into your Tacoma's factory wiring behind the driver and passenger...
    view full answer...

  • 7-Way Adapter Recommendation for 2016 Toyota Tacoma
  • If you have the 4-way harness part # C56349 installed on your 2016 Toyota Tacoma you could cut off the 4-way and wire it to the # HM40975-11998 if you wanted but an easier option would be to use the # 37185 in place of the Hopkins. It allows you to just plug the 4-ways together and then run the additional circuits as needed to give you a 7-way. If the goal is to install a brake controller you instead would wan the part # ETBC7 which also includes the 37185 but comes with everything...
    view full answer...

  • Trailer Hitch and Wiring For 2018 Toyota Tacoma To Tow Boat Trailer
  • I recommend Draw-Tite Max-Frame Trailer Hitch Receiver part # 75238 for the 2018 Toyota Tacoma because the powder coat is a little better compared to the other options with the e-coat base. The rust preventive e-coat is helpful if the hitch is exposed to salt water when you tow the boat trailer. It also is a concealed cross tube design so it will look nice on the Toyota Tacoma. The only portion that is visible of the hitch once installed is the receiver tube. I am not sure what you mean...
    view full answer...

  • Would Trailer Wiring Cause Vehicle Blinkers to Hyperflash
  • Trailer wiring should not cause hyperflashing on vehicle taillights. It would be related to the LED taillights you installed on your trailer. Most likely the resistors on the new lights aren't the correct value. You can test this by going back to the standard taillights and leaving the trailer wiring installed.
    view full answer...

  • Recommended 4-way Trailer Wiring for 2017 Toyota Tacoma
  • I choose the Tekonsha, part # 118685, over the Curt, part # C56349, but they're extremely similar. The only reason I choose the Tekonsha is because it has a higher amp capacity than the Curt. This can help from overloading the harness if your trailer has a lot of lights that draw a substantial amount of power. It's not a significant difference but you never know if you may need the higher capacity at some point.
    view full answer...


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




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Info for this part was:

Edited by:
Lindsey S
Expert Research:
Michael H
Expert Research:
Jameson C
Video Edited:
Jacob T
Installed by:
Cole B
Written by:
Amanda M
Updated by:
Kristina F
Updated by:
Isabelle B

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