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

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

Part Number: C45FV
$75.71
Retail:$111.95
You Save: 32%
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 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 (39)
  • Q & A (0)
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CURT Custom Fit Vehicle Wiring - C45FV

  • 4 Flat
  • Custom Fit
  • Trailer Hitch Wiring
  • 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   (39 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:
Mazda

Nice gauge wires. Only issue I had was getting through my firewall in Mazda CX-5. But that is not an issue with this wiring, rather installer challenge. I was going to mount next to my hitch point as on a previous car, but I won't be using it that often I can't run it out of the rear hatch.
Very satisfied.



by:

It’s about as good as I get. Install of hitch required a second person and removing the muffler. I wish they made galvanized hitches which is the main reason for removing a star, already a little rust is showing. That is the way they are.



by:

need to run power wire from 12V supply makes installation very hard,



by:
2024 Mazda CX-5

works great on my mazda cx5. Had installed harness from mazda, never could get it to work. curt t connector was so much simpler to install and works the way it should



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:

Excellent customer service! Thank you S tacey.

Shaun profile picture

Shaun

7/21/2024

Excellent



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-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

Brooke M. profile picture
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:
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.

Katrina D. profile picture
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-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:
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:

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



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:

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:
2022 Mazda CX-5

it arrived quickly in good condition



by:

Great product. Worked exactly like des cribed



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:

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



by:

Great customer service along with step by step install videos



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:

Quinn was spot on with my order!!!



by:
2023 Mazda CX-5

easy setup



by:
Mazda

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



by:

fast delivery.Fit like a glove!


25
39
Show More Reviews

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

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    To add a hitch to your 2023 Mazda CX-5, I recommend the etrailer Hitch item # e98902. This is a class III hitch with a 2" receiver. It is custom fit and bolts to your Mazda with included hardware. I really like this hitch because the crosstube mounts behind the rear bumper. This leaves only the 2" receiver visible. The etrailer Hitch item # e98902 has a 4,000 lbs towing capacity and a 600 lbs maximum tongue weight. This hitch has plenty of capacity to not only carrier accessories but...
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  • Recommended Hitch for a 2023 Mazda CX-50
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  • What is the Best Hitch for a 2024 Mazda CX-5?
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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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  • Recommended 2 Inch Hitch for a 2023 Mazda CX-5
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  • Recommended Trailer Hitch And Wiring Harness For A 2023 Mazda CX-5
    For your 2023 Mazda CX-5, I recommend checking out the: -Draw-Tite Max-Frame Trailer Hitch Receiver - Custom Fit # 76138. This trailer hitch has a maximum towing capacity of 4,500-lbs, a maximum tongue weight capacity of 675-lbs, and has a class III 2" receiver opening so you can use standard hitch mounted accessories like the Thule Hitching Post Pro - Folding Tilting 4 Bike Rack w Anti-Sway # TH934XTR. Additionally, since you are also wanting wiring you'll need the Curt T-Connector...
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  • 4-Way and 7-Way Trailer Wiring Harness For a 2023 Mazda CX-50 With Curt Trailer Hitch Receiver
    Currently the Vehicle Wiring Harness # C45FV is the only custom fit wiring harness available for your 2023 Mazda CX-50. This harness is for a 4-way flat connector that will fit most of the smaller trailers you may tow. This will likely be the most useful wiring as I see your CX-50 has a maximum towing capacity of 2,000lbs to 3,500lbs depending on your exact factory options. You can always check with your dealer to determine your exact towing capacity. A Mounting Bracket # C58001 will allow...
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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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  • Recommended Hitch and Wiring Harness for a 2024 Mazda CX-50
    To add a hitch to your 2024 Mazda CX-50, I recommended the Curt 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 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. For a wiring harness you will...
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  • 2024 Mazda CX-5 Trailer Hitch and Wiring Recommendations with Mounting Brackets
    Hey Steve! I really like having the wiring sit next to the receiver as well so I definitely get where you're coming from. Here are the parts I recommend installing on your 2024 Mazda CX-5: - etrailer Trailer Hitch Receiver # e98902 - Curt T-Connector Vehicle Wiring Harness # C45FV - Mounting Brackets # 18144 and # C57202 There are a few grommets in the bottom of your hatch that you can route the 4-Way connector through and then you'll use the mounting brackets to hold the 4-Way next...
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  • Trailer Hitch Receiver and Wiring for Towing With 2023 Mazda CX-50 Premium Plus
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  • 4-Way Trailer Wiring that Fits 2023 Mazda CX-5
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  • Recommended 7-Way Connector for a 2023 Mazda CX-50
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    To add a hitch to your 2024 Mazda CX-50, I recommend the Curt 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 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 it helps with ground clearance. f you are planning on towing...
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  • What is the Most Hidden Hitch for a 2024 Mazda CX-50?
    The most hidden hitch for a 2024 Mazda CX-50 is the Draw-Tite item # DT67YR. This hitch is custom fit and bolts to your Mazda with included hardware. This is the most hidden hitch because the entire crosstube mounts behind the rear bumper leaving only the 2" receiver exposed. I have included some pictures below. The Draw-Tite Hitch item # DT67YR is a class III hitch with a 2" receiver. It has a 3,500 lbs towing capacity and a 350 lbs maximum tongue weight. If you are planning on towing...
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  • What Hitch Fits a 2024 Mazda CX-50?
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  • etrailer Trailer Hitch Receiver Compatible With a 2022 Mazda CX-5
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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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  • 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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  • Trailer Wiring for 2022 Mazda CX-5
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  • Trailer Hitch Receiver And Vehicle Wiring Harness For a 2022 Mazda CX-5 2.5 Turbo Signature
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  • Will The Curt T-Connector Vehicle Wiring Harness # C45FV Fit a 2023 Mazda CX-5?
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  • Recommended Wiring Harness for a 2023 Mazda CX-5
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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 John S
Video Edited:
John S
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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