CURT 56377 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Select Mazda CX-5 , Black

Brand:CURT

3.6/5

109.47

If your vehicle is not equipped with wiring for towing a trailer, CURT custom wiring is the ideal solution. A custom wiring harness -- also called a T-connector -- is a simple, plug-and-play electrical device that plugs into your automotive electric system and provides a standard, universal trailer wiring connection. This is done using two or more vehicle-specific, OEM-compatible connectors to plug into the taillight assembly, eliminating the need for cutting, splicing and soldering during installation. Custom wiring harnesses are made vehicle-specific, and while they are not available for all vehicles, they do offer one of the fastest, easiest and most secure ways to wire a vehicle for towing. This particular plug-in harness provides a 4-way flat connector socket and is designed to be a custom wiring harness to fit certain years of the Mazda CX5 (to verify your vehicle compatibility, see application info). It comes with all necessary wiring components to establish a reliable trailer wiring connection, as well as a dust cover to keep the connector clean when not in use. You have a picture in mind of your next destination -- maybe it's the boat landing at your favorite fishing spot, maybe it's a campsite that overlooks one of nature's masterpieces, or maybe it's the next big jobsite. However, turning that picture into a reality takes more than just daydreaming. It takes a solid connection and the right amount of power. CURT custom wiring is made with some of the most sophisticated technology in the industry and is designed to install with ease, giving you a long-lasting electrical connection for your towing hitch setup.

DUST COVER. To promote long-lasting use and weather resistance, this 4-pole trailer lighting wire harness comes with a rubber dust cover. It easily fits onto the 4-way flat connector when not in use, protecting it against the outdoor elements. RELIABLE POWER. This 4-way trailer wiring harness is built with surface mount technology. This type of circuitry generates less heat, optimal light intensity and durable performance. VEHICLE-SPECIFIC. This aftermarket, vehicle-trailer wiring harness is designed for select years of the Mazda CX 5. STANDARD CONNECTOR. This plug-in 4-flat trailer wiring can be used to connect trailer tail lights, brake signal lights and turn signals. 4-way trailer light wiring is popular on a variety of trailers, adding versatile towing options for your vehicle. EASY TO INSTALL. No cutting! No splicing! This trailer wiring harness kit plugs into existing factory wiring on your vehicle and equips it with a standard, rear 4-pin trailer wiring connector for plugging in and towing a trailer.
Brand CURT
Brand ‎CURT
Country of Origin ‎USA
Customer Reviews 4.6 4.6 out of 5 stars 224 ratings 4.6 out of 5 stars
Exterior ‎Smooth
Is Discontinued By Manufacturer ‎No
Item model number ‎56377
Item Weight 1.63 Pounds
Item Weight ‎1.63 pounds
Manufacturer ‎CURT
Manufacturer Part Number ‎56377
Material Rubber
Model ‎Custom Wiring
OEM Part Number ‎56377

3.6

13 Review
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78
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13
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Scritto da: Justin E
Low quality
The connector was crushed when I got it. This was the second time I've installed a curt trailer wiring harness for two different cars. Quality of materials seems lower than my first harness. Easy to install but a hassle without a lift for the cx5 because of all the paneling.
Scritto da: cheesis
wired, baby!
This is a decent kit with an isolator to keep vehicle's electrical system unaffected by wiring problems that originate with your trailer. The two sided tape affixed to the back of the isolator/ control unit was as dry and useless as tits on a mule, so you'll have most likely to figure another way to secure it to one of your interior panels. Also take note that when you secure your two thick wires together that one is 14 ga. and the other 12, and the butt connector provided, being a 10/12 might have to get a little extra crimping on the 14 side. Made in China
Scritto da: Al A.
Well made and my Mazda Dealership installed it and complimented me on this harness!
I had my Mazda dealer handle installation of this and a Curt 2" receiver on a new 2021 CX-5 Signature I just purchased. I'm familiar with Curt products as I've owned them before and every one was well made. The tech who installed this said it was a great choice and he said the installation went very easy and logically as well. The Tech and I discussed any shortcuts to the install and he emphasized not to take a shortcut and splice to the hot wire to the rear 12V cigarette receptacle as does Curt NOT want you to do this per the installation instructions. The hot wire should go to the battery location under the hood. My Utility Trailer uses all regular bulbs rather than low power LEDs and the Tech said it is safer and more reliable to hot wire to the battery due to the higher demand on that circuit branch. Given I might use that rear cirgarette lighter location for other accessories, that all makes sense. Maybe I'll convert my trailer to all LEDs at some point. Both the Service Advisor and the Tech warned me not to take any shortcuts and they wanted to adhere to Curt's Installation instructions for this harness, including the black hot wire that has to run to the front of the vehicle. It was, -By the Book, period!- There is plenty length for the harness connection and everything is stored in the rear wheel-well where the spare tire is located. No complaints and when a Mazda tech says a product is great and the install of it was the same, that's good enough for me! 5 Stars all around and no complaints at all.
Scritto da: Steve Gordon
Fits well all aspects , good product thanks
Mazda Installation difficult ! Harness great quality, needs wiring 12 in longer for trailer connect
Scritto da: aussiemama
Doubleback tape
The doubleback tape was useless, had no adhesion, past shelf life. Kit install pretty straight forward.
Scritto da: B. T.
Install by watching the video. There's one tricky part.
This adapter is well made and overall pretty easy to install. Of course running the power wire from the battery is a pain, but it can be done without a lift. I was able to squeeze under the car and zip tie the power wire to the existing support and then put the plate that protects that area back on. I used the Uhaul video and it walks you through the entire install in great detail. They use an upgraded battery cable but it's pretty self explanatory how to use the one that comes in this kit. I was able to install this in about an hour. I leave it inside the car under the trunk mat and just run it out and hook it up and then close the trunk over the wires when in use. You can also mount it outside the car, but then you'll need to worry about keeping the connection clean. As little as we use it I'd rather keep it out of the elements until needed. The trunk does not damage the wires when closed.
Scritto da: Amazon Customer
Easy to install for a total newbie with no special tools!
It took me a day (I have an infant so everything takes me much longer than it should) but it works and I figured all of it out myself!
Scritto da: Michael Maxwell
Easy install
Easy install, but I tapped positive into the power lead for the accessory socket in my cargo area. More than enough amps on that fuse in my car to handle the lights, and I installed the inline fuse as a backup. Didn't feel like running a power lead under the car and didn't need to. Works perfectly. Extra length sits in my spare tire area and I just close the hatch over the wire when not using it. I only use it a few times a year anyway so no sense running it through the floor.
Scritto da: Dohn
Very easy to install
Good product instructions
Scritto da: Barry C.
Works great on Mazda CX-5
Had it installed professionally, works as expected.
Scritto da: Amazon Customer
Easy to install works well
Works as advertised easy to install
Scritto da: Luma46
Works well on 2021 Mazda CX5
Good product, fits the vehicle, but not so easy to install. You have to partially remove some cover panels from trunk and run a + wire from battery, under the vehicle into the trunk.
Scritto da: Sanchit Datyal
Worked on mazda cx5 2019
Highly recommend it and took 2 hrs for installation

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