✨ Christmas Special: Get 35% OFF your first order. ✨

Your Shopping Bag

Your bag is empty

Subtotal $0.00
Shipping Calculated at checkout
Continue Shopping

Christmas Sale Curt 56377 Custom Wiring Harness; 4-way Flat Output; Select Mazda Cx-5 System [F8Sn0sMt]

$25.99 $83.99 -69%

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

Secure Shopping

100% Safe Guarantee

Free Shipping

On orders over $30

Money-Back

30-Day Guarantee

Christmas Sale Curt 56377 Custom Wiring Harness; 4-way Flat Output; Select Mazda Cx-5 System [F8Sn0sMt]

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 its the boat landing at your favorite fishing spot, maybe its a campsite that overlooks one of natures masterpieces, or maybe its 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.
Resources
Installation Instructions

Specifications:

Battery-Powered Yes
Box Height in Inches - XA 0
Box Length in Inches - XA 0
Box Width in Inches - XA 0
Class ID 11
Converter Type Circuit Protected and Powered
Description_ABR TCONN
Description_ASC 4-way flat output connects tail lights, brake lights and turn signals
Description_ASC Backed by a limited one-year warranty
Description_ASC Constructed with SMT circuitry for better performance and durability
Description_ASC Custom Wiring Harness, 4-Way Flat Output, Select Mazda CX-5
Description_ASC Dust cover included to keep connector clean when not in use
Description_ASC Equipped with tail light converter for vehicle-trailer compatibility
Description_ASC Plugs into vehicle tail light assembly to provide a 4-way flat socket
Description_ASC Simple plug-and-play design eliminates the need for cutting or splicing
Description_ASM CURT 56377 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Mazda CX-5
Description_DEF Trailer Connector Kit
Description_DES Custom Wiring Harness, 4-Way Flat Output, Select Mazda CX-5
Description_DES Custom Wiring Harness; 4-Way Flat Output; Select Mazda CX-5
Description_EXT CURT 56377 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Mazda CX-5
Description_EXT CURT 56377 Vehicle-Side Custom 4-Pin Trailer Wiring Harness; Fits Select Mazda CX-5
Description_FAB 4-Way Flat Output Connects Tail Lights Brake Lights Turn Signals
Description_FAB Backed By A Limited One-Year Warranty
Description_FAB Constructed w/Smt Circuitry For Better Performance And Durability
Description_FAB Dust Cover Included To Keep Connector Clean When Not In Use
Description_FAB Equipped With A 3-Wire To 2-Wire Tail Light Converter
Description_FAB Made In USA
Description_FAB Plugs Into OEM Vehicle Socket To Provide A 4-Way Flat Socket
Description_FAB Simple Plug-And-Play Design Eliminates Cutting Or Splicing
Description_INV Custom Wiring Harness
Description_KEY t 4pin t-harness extension extensions rv four draw harnes traler rugged auto 4way tite receiver adapter kits parts wires t-one ridge part 4wire 4flat replacement gauge utility 2017 2018 2019
Description_LAB Proposition 65
Description_MKT 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.
Description_MKT 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 its the boat landing at your favorite fishing spot, maybe its a campsite that overlooks one of natures masterpieces, or maybe its 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.
Description_SHO Custom Wiring
Description_SHO Custom Wiring Harnes
Description_SLA 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.
Electrical System Type 3W
Finish - XA N/A
height 3.0
Item Class - XA CME
Item Height - XA 0.000
Item Length - XA 0.000
Item Width - XA 0.000
length 9.0
LTL N
Output Type 4-Way Flat
Parcel Allowed - XA Yes
Product Weight - XA 1.625
Rate Class - XA 70.0
Retail Height - XA 3.000
Retail Length - XA 9.000
Retail Width - XA 6.000
Shipping Weight - XA 1.625
T-Connector Location S3,S4
Tail Light Circuits 6.0 Amps
Tariff 301 - XA No
Title Custom Wiring Harness, 4-Way Flat Output, Select Mazda CX-5
Turn and Brake Circuits 3.0 Amps
Warranty One-Year Limited Warranty
weight 1.625
width 6.0

What Our Customers Say

January 23, 2026

Absolutely no complaints!

This is a very sturdy, highly impressive tool.

- Damian T..

January 23, 2026

Absolutely no complaints!

A wonderful product with truly great utility.

- August L..

January 23, 2026

Absolutely no complaints!

Very happy with my truly wonderful item.

- Edith Z..

Write a Review

You Might Also Like

Discover more great products from our collection.

Dressed Up Rorie

Dressed Up Rorie

(712)
$18.99 $60.99 -69%
Marquise Diamond Ring Set

Marquise Diamond Ring Set

(230)
$91.99 $294.99 -69%
Lyrics.

Lyrics.

(298)
$57.99 $185.99 -69%

Copyright 2026 © mappa-mercia.org

VISA
PayPal
Stripe
Mastercard
CASH ON DELIVERY