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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 # C45FV
Retail:$111.95
Our Price: $88.58
You Save: 21%
Custom Fit Vehicle Wiring

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Shipping Weight: 1.85 lbs
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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 C45FV 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 (30)
  • Q & A (0)
  • Photos

CURT Custom Fit Vehicle Wiring - C45FV

  • 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 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 in rear cargo area
    • Plug in T-connector
    • Run hot lead to car battery
  • Includes a powered tail light converter that connects directly to your battery to avoid overloading your 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: 3.0 amps per circuit
    • Tail lights: 6.0 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 trim access cover, scuff panels, and tail lights to access these connection points. Once you've plugged in the T-connector, run the hot lead to your car battery, which can be found in the engine compartment. 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 in an out-of-the-way location within your trunk.


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.


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.



56487 Curt T-Connector - Surface Mount Technology - 4 Wire

Installation Details C45FV Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:


Customer Reviews

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - C45FV

Average Customer Rating:  4.7 out of 5 stars   (30 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.

by:

Installed a 2” hitch and wiring harness on my new 2023 Mazda CX-5. Install went Great. The self help videos were Awesome, explained everything perfectly. All parts went in with no problem. Product is built really well and it fit perfect. Thank you.



by:

Fairly simple to install. I did some small modification to meet my needs. WATCH THE VIDEO. The written instructions are a bit messy.



by:

I ordered the wrong trailer harness, so I have reordered and am returning the one I received.



by:
2023 Mazda CX-5

The green wire was too short. I had to add more wire to it so it would reach.
It is ok now.

Etrailer Expert

Katrina D.

1/4/2024

If you are needing some additional wiring, you can use part # 16-4B-1.



by:
2023 Mazda CX-50

Kit was missing a lot of components. Fuse wire connectors no zip ties etc etc. and rear wire assembly was a foot short to reach other light assembly. Not good

Etrailer Expert

Brooke M.

9/15/2023

Oh my, I am so sorry to hear that! I have sent over your information to our customer service team and they will be getting in touch with about this.



by:

Very satisfied with your website. Second time ordering from the site. Order was delivered on the date shown when ordered.



by:
2023 Mazda CX-5

I installed this kit on a 2023 Mazda cx5. Plugged right into the factory harness in trunk. No splicing needed. Then just run positive to battery with fuse kit provided. Instructions and video are great.



by:

Fit perfectly on the CX-50. The most difficult part was running the wire from the rear to the battery terminal. Total time took about 1.5 hrs but I’m excited to be able to haul my ATV around again! Would definitely recommend.



by:
2023 Mazda CX-50

This harness was fantastic. This made a first time hitch install a breeze. The brake harness connectors were perfect and came with everything needed to complete a clean install. Very satisfied with everything I purchased to make this happen.



by:
2022 Mazda CX-5

it arrived quickly in good condition



by:

Great product. Worked exactly like des cribed



by:

Fit perfectly. The step by step video guide is most helpful and I knew exactly what to expect before I started the job. Thanks for the help



by:
2023 Mazda CX-5

Easy to install (other than pulling car apart!). Instructions were clear. It took me about 1 hour to disassemble the car, complete all the wiring, and re-assemble the car.



by:

It worked and the instructions were good.
Seemed
like a bit of overkill and overpriced for what it does.Running a wire to the battery is ridiculous.



by:

Great customer service along with step by step install videos



by:

Delivered in the same container as the hitch. Without any problems .



by:
2023 Mazda CX-5

easy setup



by:

Excellent customer service! Thank you S tacey.



by:

Quinn was spot on with my order!!!



by:
Mazda

Quick and easy install. Perfect fit for the Mazda CX-5.



by:

fast delivery.Fit like a glove!



by:

Fit well



by:
2023 Mazda CX-5



by:
2022 Mazda CX-5



by:


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30
Show More Reviews

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

  • Recommended Hitch for a 2023 Mazda CX-5
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    It sounds like you are needing to add a 6-Pin Connector # PK12720 on your 2019 Mercedes Benz Sprinter for hauling a trailer. For this you will need either a 4-Way # C45FV with our Install Kit # ETBC6 or the 7-Way Kit # TK82VR along with a 7 to 6 Way Adapter # 47549. If your trailer has electric brakes you will also need a Redarc Tow-Pro Liberty Brake Controller # RED24FR. This will connect to the 6-pin install kit using the Universal Harness # RED69FR or the Tekonsha 7-way kit above using...
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  • Does the Curt Hitch C38BR Fit a 2024 Mazda CX-50?
    Yes, it does! The Curt Hitch item # C38BR has been confirmed to fit the 2024 Mazda CX-50. This hitch is custom fit and bolts to your Mazda with included hardware. This is a class III hitch with a 2" receiver. It has a 3,500 lbs towing capacity and a 350 lbs maximum tongue weight. I really like the Curt hitch item # C38BR because the crosstube mounts behind your rear bumper leaving only the 2" receiver exposed. This not only looks better but it helps with ground clearance. If you are...
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  • Recommended 2 Inch Hitch for a 2023 Mazda CX-5
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  • Recommended 4-Way Wiring Harness for a 2023 Mazda CX-5
    To add a 4-way connector to your 2023 Mazda CX-5, I recommend the Curt T-Connector Vehicle Wiring Harness item # C45FV. This custom-fit T-connector plugs into your Mazda's wiring harness, which is located behind the rear tail lights. It will provide you with a 4-flat connector that will control your trailer or accessory's lighting functions. I also recommend using the No-Drill Mount Bracket item # 18136 and the item # C42CR to secure the 4-way connector to your hitch. This will put it...
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  • Best Trailer Hitch Receiver and 4-Way Vehicle Wiring Harness For a 2024 Mazda CX-50
    I recommend the Curt Trailer Hitch Receiver # C38BR as the best option for your 2024 Mazda CX-50. This receiver is custom fit and bolts on to existing bolt holes in your frame. It also has a 2" receiver opening for a larger selection of hitch mounted accessories and ball mounts. The Curt T-Connector Vehicle Wiring Harness # C45FV will provide you with a 4-way flat connector. This is the most common connector used on small trailers you might pull. It can also be used with Auxiliary Lights...
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  • What is the Best Hitch for a 2024 Mazda CX-5?
    The best hitch for a 2024 Mazda CX-5 is the etrailer item # e98902. This hitch is custom fit and bolts to your Mazda with included hardware. This hitch is custom fit and bolts to your Mazda with included hardware. The etrailer hitch item # e98902 is a class III hitch with a 2" receiver, it has a 4,000 lbs towing capacity and a 600 lbs maximum tongue weight. I really like this hitch because the crosstube mounts behind the rear bumper cover leaving only the 2" receiver visible. This not...
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    Image 1 for Image 2 for
  • Best Hitch for a 2023 Mazda CX-5
    The best hitch for your 2023 Mazda CX-5 is the etrailer Hitch item # e98902. This hitch is custom fit and bolts to your Mazda with included hardware. This is a class III hitch with a 2" receiver. It is made in the USA and has a 4,000 lbs towing capacity and a 600 lbs maximum tongue weight. The reason that this is the best hitch, aside from affordability, is because the crosstube mounts behind the rear bumper cover leaving only the 2" receiver visible. This not only looks better but it...
    view full answer...
    Image 1 for Image 2 for
  • Recommended Hitch for a 2023 Mazda CX-50
    The best hitch for your 2023 Mazda CX-50 is the Curt Trailer Hitch item # C38BR. This hitch is custom fit and bolts to your Mazda with included hardware. This is a class III hitch with a 2" receiver. It is made in the USA and has a 3,500 lbs towing capacity and a 525 lbs maximum tongue weight. I really like this hitch because the crosstube mounts behind the rear bumper cover leaving only the 2" receiver visible. This not only looks better but it also helps with ground clearance. I have...
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  • Recommended 7-Way Connector for a 2023 Mazda CX-50
    To install a 7-Way harness on your 2023 Mazda CX-50 you will need two separate wiring harnesses because they don't make just one that'll do the job. The first harness you'll need is the Curt T-Connector Vehicle Wiring Harness item # C45FV. This custom-fit T-connector plugs into your Mazda's wiring harness, which is located behind the tail lights. This will provide you with a 4-flat connector. The second harness you will need is the Universal Installation Kit for Trailer Brake Controller...
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  • Trailer Wiring for 2022 Mazda CX-5
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  • Will Curt Hitch Fit New 2022 Mazda CX-5 Model
    Yes, the Curt Trailer Hitch Receiver # C13315 is a fit for your 2022 Mazda CX-5. We actually had the opportunity to install this on a 2022 CX-5 so I'm linking the installation video as well as a photo for you to reference. If you were looking to use this hitch for towing you also need wiring, part # C45FV. If you were looking at it for a bike rack I recommend checking out the Kuat Transfer V2 Bike Rack for 2 Bikes # KU84FR because it's easier to use and load/unload bikes compared to your...
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  • etrailer Trailer Hitch Receiver Compatible With a 2022 Mazda CX-5
    Yes, the etrailer Trailer Hitch Receiver # e98902 is confirmed to fit your 2022 Mazda CX-5. If you have a Grand Touring model you will have an additional underbody trim piece that will need to be permanently removed for hitch installation. I recommend installing the Vehicle Wiring Harness # C45FV when you install the receiver. This will give you a 4-way flat connector. This connector can connect to most small trailers as well as provide a connector for Auxiliary Lights # C53201. The auxiliary...
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  • Will The Curt T-Connector Vehicle Wiring Harness # C45FV Fit a 2023 Mazda CX-5?
    Yes, the Curt T-Connector Vehicle Wiring Harness # C45FV will fit your 2023 Mazda CX-5. I have linked an installation video below showing the installation on your vehicle.
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  • Recommended 7-Way Connector for a 2023 Mazda CX-5
    To install a 7-Way harness on your 2023 Mazda CX-5 you will need two separate wiring harnesses because they don't make just one that'll do the job. The first harness you'll need is the Curt T-Connector Vehicle Wiring Harness item # C45FV. This custom-fit T-connector plugs into your Mazda's wiring harness, which is located behind the tail lights. This will provide you with a 4-flat connector. The second harness you will need is the Universal Installation Kit for Trailer Brake Controller...
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  • Best Trailer Hitch Receiver For Ground Clearance On a 2023 Mazda CX-50
    The Curt Trailer Hitch Receiver # C27DR is currently the receiver with the best ground clearance for your 2023 Mazda CX-50.This receiver has a 1-1/4" receiver moving it just slightly higher than the 2" Receiver # C38BR which is also manufactured by Curt. I recommend installing the Wiring Harness # C45FV when you install the receiver. This will provide you with a 4-way connector for connecting to the tail lights on most small trailers you might pull. It can also be used for Auxiliary Lights...
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  • Will The Curt C45FV Activate Tow Mode On A 2023 Mazda CX-50?
    Unfortunately the Curt wiring harness # C45FV would not activate the tow mode on your 2023 Mazda CX-50. According to Mazda, only their OEM wiring harness will work with the tow mode. You can absolutely still use the # C45FV to work your trailer lights, but the tow mode will not activate.
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  • What Hitch Fits a 2024 Mazda CX-50?
    Yes, it will! The Curt Hitch item # C38BR is custom fit and bolts to your 2024 Mazda CX-50 with included hardware. This is a class III hitch with a 2" receiver. It has a 3,500 lbs towing capacity and a 525 lbs maximum tongue weight. I really like the Curt hitch item # C38BR because the crosstube mounts behind your rear bumper leaving only the 2" receiver exposed. This not only looks better but helps with ground clearance. I have attached a couple of pictures below along with an installation...
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  • Will The 4-Way Wiring Disable The Reverse Safety Sensors On a 2023 Mazda CX-50?
    The 4-Way Vehicle Wiring Harness # C45FV will not disable the backup safety features on your 2023 Mazda CX-50. You are able to switch off the rear sensors by turning off the i-ACTIVSENSE on your Mazda. This will allow you to still back up with a trailer and not setting off all the safety features. The T-One is not able to disable these features as it does not integrate into the ECU on your Mazda. It only sends power to the trailer tail lights when it sees power going to the vehicle tail lights.
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  • Trailer Hitch, Wiring, and Bike Rack Recommendations for a 2022 Mazda CX-5
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  • 4-Way Trailer Wiring that Fits 2023 Mazda CX-5
    For a 4-way that fits your 2023 Mazda CX-5 you would want the Curt # C45FV which installs easily and is very reliable. The # 18144 is compatible with this 4-way and basically any 4-way out there, but with that said the trailer wiring that fits your vehicle is designed to be stored in the rear hatch area and only pulled out when needed. This might seem odd but it's actually the best way as it keeps the 4-way out of the elements and protected and the truck seal does not hurt the wiring at all.
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  • Recommended Wiring Harness for a 2023 Mazda CX-5
    I just checked with all of our vendors and the correct custom fit wiring harness available for the 2023 Mazda CX-5 is the T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C45FV.
    view full answer...
  • Parts Needed to Tow a Trailer w/ Brakes w/ a 2024 Hyundai Santa Cruz
    I would be happy to help you find a set up for your 2024 Hyundai Santa Cruz that will allow you to tow a trailer with brakes. You're going to need both a 4-way and 7-way connector because there isn't an aftermarket option to give you just the 7-way. You will also need a brake controller and a wiring adapter amongst other things that I have listed below. The first harness you'll need is the Curt T-Connector Vehicle Wiring Harness item # C45FV. This will provide you with a 4-flat connector. The...
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Do you have a question about this Custom Fit Vehicle Wiring?


Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jameson C
Expert Research:
Jameson C
Employee Joshua S
Video by:
Joshua S
Employee Thomas T
Video by:
Thomas T
Employee Chris R
Video Edited:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Michael B
Installed by:
Michael B
Employee Jacob H
Test Fit:
Jacob H
Employee Ryan G
Test Fit:
Ryan G
Employee Sabrina W
Written by:
Sabrina W

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