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Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70
Curt Spectrum Brake Control and 7-Way Wiring Kit for Mazda CX-90 CX-70

Curt Spectrum Electric Trailer Brake Control w/ 7-Way Wiring Kit For 24-25 Mazda CX-90 2025 CX-70

Model: CU83JH
Includes Everything Pictured:
Custom Wiring Harness, 4-Way Flat Output
Dual-Output Electrical Adapter (Adds 7-Way RV Blade to 4-Way Flat)
Trailer Brake Controller Wiring Kit (duplex undercar wires, circuit breakers, terminals & ring connectors)
30-Amp Universal Circuit Breaker
Spectrum Integrated Proportional Trailer Brake Controller
Trailer Brake Controller Harness
Installation Hardware (if required)
Installation Instructions (if required)
Installation Schematics & Diagrams (if required)

This Trailer Wiring Harness Fits The Following Vehicles:

  • 2025 Mazda CX-70 All Models
  • 2024 - 2025 Mazda CX-90 All Models

CURT 56494 Vehicle-Side Custom 4-Pin Trailer Wiring Harness (QTY 1)

Manufactured by: Curt

CURT custom wiring connectors are the easiest way to outfit your vehicle with a CURT trailer wiring connection They are built with some of the most advanced technology in the industry, and each one is custom-fitted to work with a specific make and model Some automotive manufacturers install a special socket on the vehicle to be used for vehicle-to-trailer wiring.

Although this special socket is not equipped on every vehicle, a CURT custom wiring connector -- also called a T-connector -- utilizes the socket for simple, stress-free installation Rather than requiring you to cut, splice and solder into your vehicle's wiring system, the custom wiring connector uses a single OEM-compatible plug and instantly provides a standard, universal vehicle-to-trailer wiring connection, typically in the form a 4-way flat All CURT custom wiring connectors are made vehicle-specific for the easiest possible installation and the best fit.

This particular plug-in connector provides a 4-way flat socket and is designed to be a custom wiring option for certain years of the Mazda CX-90 (factory tow package required; to verify your vehicle compatibility, see application info) It comes with all necessary hardware to establish a solid connection It also comes with a dust cover to keep the connector socket clean when not in use.

To ensure long-lasting reliability, all CURT custom wiring connectors are thoroughly tested for optimal functionality Stress is the last thing you should feel when towing a trailer -- whether you're hauling your RV to that favorite camping destination, your ATVs up to the hunting grounds or your fishing boat to the new hidden hotspot At CURT, we think your towing equipment should add to the enjoyment of your experience, not detract from it..

Features:

  • Plugs into existing OEM vehicle socket to provide a 4-way flat socket
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 4-way flat output connects tail lights, brake lights and turn signals
  • Equipped with tail light converter for vehicle-trailer compatibility
  • Constructed with SMT circuitry for better performance and durability
  • Dust cover included to keep connector clean when not in use
  • Backed by a limited one-year warranty

CURT 57672 Dual-Output 4-Way Flat Vehicle-Side to 7-Way RV Blade Trailer Wiring Adapter (QTY 1)

Manufactured by: Curt

There are several different types of connectors used to supply power from a tow vehicle's electrical system to a trailer's wiring system Some trailers only need the bare essentials -- running lights, brake lights and turn signals -- while others require a connection for reverse lights, electric brakes and auxiliary power With connectors ranging from simple to complex, it may be the case that the connection between your vehicle and your trailer is not a perfect match.

For example, your truck may be equipped with a 6-way round socket, but your trailer may have a 4-way flat plug For this very common problem, CURT offers a quick and simple solution in the form of an electrical adapter An adapter is an electrical device that allows a connection to be made between a mismatched trailer plug and vehicle socket.

It easily plugs in your vehicle's electrical socket and usually requires no additional wiring CURT offers an array of adapters to accommodate most types of plugs and sockets, including 4-way flat, 4-way round, 5-way flat, 6-way round, 7-way RV blades and more This special dual-output electrical adapter is actually designed to adapt a 4-way flat vehicle socket to fit multiple trailer plugs, including a 4-way flat and a 7-way RV blade connector.

Some manual wiring is required This multipurpose socket also comes with dust covers, a mounting bracket and all necessary mounting hardware for a complete installation All CURT wiring and electrical products come with a one-year limited warranty to give you the assurance you need to tow with confidence..

Features:

  • Adapts a 4-way flat socket to fit 4-way flat and 7-way RV blade trailer plugs
  • 4-way flat output connects tail lights, brake lights and turn signals
  • 7-way connects tail, brake, reverse, turn signals, brakes and auxiliary power
  • Dust covers included to keep connectors clean when not in use
  • Slit loom keeps wires contained and well protected
  • Metal bracket securely mounts wiring to the vehicle or trailer hitch

CURT 51500 Electric Trailer Brake Controller Wiring Kit (QTY 1)

Manufactured by: Curt

It takes a lot of power to stop a moving trailer, especially when that trailer is hauling livestock, construction materials, industrial equipment or other heavy-duty cargo Play it safe when you tow and give your trailer brakes the control they need with a CURT trailer brake controller and brake controller harness This brake controller wiring kit is designed for vehicles that do not have an included towing prep package.

It includes cables, ring terminals, cable ties and a circuit breaker to splice into your vehicle's wiring system and allow installation of a CURT trailer brake controller This wiring kit is compatible with systems with up to eight brakes..

Features:

  • For tow vehicles not equipped with factory tow package wiring
  • Compatible with 2, 4, 6 or 8-brake systems (1-4 axles)
  • Designed for use with CURT quick plugs #51515 or #51516
  • Brake controller and trailer connector are not included

CURT 58361 30-Amp Universal Circuit Breaker (QTY 1)

Manufactured by: Curt

Whether you're a contractor on your way to the jobsite or just a casual fisherman heading to the boat landing, you need working trailer lights to tow safely and legally For any towing setup, CURT offers quality wiring components, including complete wiring kits, circuit breakers, wiring connectors and more This universal circuit breaker is rated for 30 amps and recommended for applications where over-current protection is required..

Features:

  • Recommended for applications where over-current protection is required

CURT 51170 Spectrum Original Equipment Style, Integrated Electric Trailer Brake Controller, Proportional (QTY 1)

Manufactured by: Curt

The CURT Spectrum trailer brake controller provides powerful brake operation while maintaining a clean, consistent OE look and feel on the dash of your vehicle It is comprised of a main module and a separate user interface This interface is a simple rotary knob with a push-button and ten tri-color LEDs to control and monitor all trailer brake activity.

It also features a triple-axis accelerometer for highly responsive, smooth stops on any grade The separated module and interface of the Spectrum brake controller allow it to integrate with the vehicle unlike any other The main module can be mounted behind the dash and completely out of sight.

The separate rotary knob provides a sleek, subtle interface that mounts on the dash of the vehicle wherever desired It features ten LEDs with three colors each (red, green and blue) to indicate trailer brake activity and power adjustment The rotary knob and integrated push-button allow for simple and effective operation of the control settings and manual adjustment.

The Spectrum trailer brake controller offers superior safety and helps protect the life of your vehicle and trailer with its advanced triple-axis accelerometer This integrated circuit detects the motion of the vehicle and trailer when making stops and applies the precise amount of brake power for maximum efficiency and effectiveness The three axes of the circuit also enable the brake control to compensate when going up or down a hill.

Like most CURT brake controllers, the Spectrum installs using one of our vehicle-specific quick plug harnesses It also has automated leveling and calibration capabilities to simplify and speed up the installation process The Spectrum trailer brake controller comes with mounting hardware for a complete installation..

Features:

  • Controls all brake settings with a simple push-button rotary knob
  • Clean, dash-mounted, OEM-style user interface with 10 tri-color LEDs
  • Main module can be mounted out of sight
  • Triple-axis, motion-sensing accelerometer for highly responsive, smooth stops
  • Easily accessible manual override with the press of a button
  • Features two installation options: drill mount or surface adhesive mount
  • Automatic leveling and calibration eliminate setup requirements
  • Plug-and-play install with vehicle-specific quick plug harness (sold separately)
  • Operates 2-8 trailer brakes at a time (1-4 axles)
  • Built-in reverse-polarity and short-circuit protection
  • Compatible with low-volt, PWM, ABS, cruise control and electric over hydraulic
  • Tow vehicle 'low voltage' and trailer disconnect indicators
  • Limited lifetime warranty

CURT 51530 Quick Plug Electric Trailer Brake Controller Wiring Harness (QTY 1)

Manufactured by: Curt

A CURT Quick Plug brake controller wiring adapter is one of the fastest and easiest ways to plug your brake controller into your vehicle It requires no cutting or splicing! Just insert the vehicle-specific plug end into the OEM vehicle’s factory brake controller socket The other end plugs into your CURT trailer brake controller.

Quick Plug harnesses are available for a variety of vehicles and are unique for each vehicle application to provide the easiest possible installation This particular brake controller harness fits certain years of the Mazda CX-50 and CX-90 (see application info to verify fitment) CURT Quick Plug harnesses are compatible with most CURT brake controls and can be used as a replacement or for a new control unit installation.

They're also great for towing all types of trailers with electric brakes For versatile mounting of your trailer brake controller this Quick Plug wire harness measures two feet long It also features a slit loom sleeve to keep the wires protected against crushing and abrasions.

CURT Quick Plug wire plug-in adapters are made with 12-gauge wires for a reliable connection and braking, and come with zip ties to keep the harness contained and out of sight..

Features:

  • Allows a CURT trailer brake controller to be plugged into OEM socket
  • Quick plug harness installs with plug-and-play convenience
  • Wire colors match standard brake controller harnesses
  • Includes 24" of 12 gauge wire for flexible installation
  • Slit-loom sleeve keeps wires contained and protected

List of Fitment Years:

2025, 2024
Hitches Near Me: We operate out of several warehouses across the country, ensuring faster delivery to your location.

$532 58 $568.70 6% OFF

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$568.70 $532 58

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Questions? Call our Auto Experts at (877) 869-6690

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Payment options are offered by Affirm and are subject to an eligibility check and might not be available in all states. CA Residents: Loans by Affirm Loan Services, LLC are made or arranged pursuant to a California Finance Lender license.

Fits Vehicle Styles

Product Details

  • Brand: Curt
  • Model: CU83JH
  • Includes: Trailer Wiring 7-Way Plug w/ Bracket,  Spectrum Brake Control
Compatibility Chart
Year Range Make Model Style

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File Size
pdf_curt_56494.pdf 866.6KB Download
pdf_curt_57672.pdf 421.58KB Download
pdf_curt_51500.pdf 483.83KB Download
pdf_curt_51170.pdf 891.76KB Download
pdf_curt_51530.pdf 203.31KB Download

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Description

Includes Everything Pictured:
Custom Wiring Harness, 4-Way Flat Output
Dual-Output Electrical Adapter (Adds 7-Way RV Blade to 4-Way Flat)
Trailer Brake Controller Wiring Kit (duplex undercar wires, circuit breakers, terminals & ring connectors)
30-Amp Universal Circuit Breaker
Spectrum Integrated Proportional Trailer Brake Controller
Trailer Brake Controller Harness
Installation Hardware (if required)
Installation Instructions (if required)
Installation Schematics & Diagrams (if required)

This Trailer Wiring Harness Fits The Following Vehicles:

  • 2025 Mazda CX-70 All Models
  • 2024 - 2025 Mazda CX-90 All Models

CURT 56494 Vehicle-Side Custom 4-Pin Trailer Wiring Harness (QTY 1)

Manufactured by: Curt

CURT custom wiring connectors are the easiest way to outfit your vehicle with a CURT trailer wiring connection They are built with some of the most advanced technology in the industry, and each one is custom-fitted to work with a specific make and model Some automotive manufacturers install a special socket on the vehicle to be used for vehicle-to-trailer wiring.

Although this special socket is not equipped on every vehicle, a CURT custom wiring connector -- also called a T-connector -- utilizes the socket for simple, stress-free installation Rather than requiring you to cut, splice and solder into your vehicle's wiring system, the custom wiring connector uses a single OEM-compatible plug and instantly provides a standard, universal vehicle-to-trailer wiring connection, typically in the form a 4-way flat All CURT custom wiring connectors are made vehicle-specific for the easiest possible installation and the best fit.

This particular plug-in connector provides a 4-way flat socket and is designed to be a custom wiring option for certain years of the Mazda CX-90 (factory tow package required; to verify your vehicle compatibility, see application info) It comes with all necessary hardware to establish a solid connection It also comes with a dust cover to keep the connector socket clean when not in use.

To ensure long-lasting reliability, all CURT custom wiring connectors are thoroughly tested for optimal functionality Stress is the last thing you should feel when towing a trailer -- whether you're hauling your RV to that favorite camping destination, your ATVs up to the hunting grounds or your fishing boat to the new hidden hotspot At CURT, we think your towing equipment should add to the enjoyment of your experience, not detract from it..

Features:

  • Plugs into existing OEM vehicle socket to provide a 4-way flat socket
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 4-way flat output connects tail lights, brake lights and turn signals
  • Equipped with tail light converter for vehicle-trailer compatibility
  • Constructed with SMT circuitry for better performance and durability
  • Dust cover included to keep connector clean when not in use
  • Backed by a limited one-year warranty

CURT 57672 Dual-Output 4-Way Flat Vehicle-Side to 7-Way RV Blade Trailer Wiring Adapter (QTY 1)

Manufactured by: Curt

There are several different types of connectors used to supply power from a tow vehicle's electrical system to a trailer's wiring system Some trailers only need the bare essentials -- running lights, brake lights and turn signals -- while others require a connection for reverse lights, electric brakes and auxiliary power With connectors ranging from simple to complex, it may be the case that the connection between your vehicle and your trailer is not a perfect match.

For example, your truck may be equipped with a 6-way round socket, but your trailer may have a 4-way flat plug For this very common problem, CURT offers a quick and simple solution in the form of an electrical adapter An adapter is an electrical device that allows a connection to be made between a mismatched trailer plug and vehicle socket.

It easily plugs in your vehicle's electrical socket and usually requires no additional wiring CURT offers an array of adapters to accommodate most types of plugs and sockets, including 4-way flat, 4-way round, 5-way flat, 6-way round, 7-way RV blades and more This special dual-output electrical adapter is actually designed to adapt a 4-way flat vehicle socket to fit multiple trailer plugs, including a 4-way flat and a 7-way RV blade connector.

Some manual wiring is required This multipurpose socket also comes with dust covers, a mounting bracket and all necessary mounting hardware for a complete installation All CURT wiring and electrical products come with a one-year limited warranty to give you the assurance you need to tow with confidence..

Features:

  • Adapts a 4-way flat socket to fit 4-way flat and 7-way RV blade trailer plugs
  • 4-way flat output connects tail lights, brake lights and turn signals
  • 7-way connects tail, brake, reverse, turn signals, brakes and auxiliary power
  • Dust covers included to keep connectors clean when not in use
  • Slit loom keeps wires contained and well protected
  • Metal bracket securely mounts wiring to the vehicle or trailer hitch

CURT 51500 Electric Trailer Brake Controller Wiring Kit (QTY 1)

Manufactured by: Curt

It takes a lot of power to stop a moving trailer, especially when that trailer is hauling livestock, construction materials, industrial equipment or other heavy-duty cargo Play it safe when you tow and give your trailer brakes the control they need with a CURT trailer brake controller and brake controller harness This brake controller wiring kit is designed for vehicles that do not have an included towing prep package.

It includes cables, ring terminals, cable ties and a circuit breaker to splice into your vehicle's wiring system and allow installation of a CURT trailer brake controller This wiring kit is compatible with systems with up to eight brakes..

Features:

  • For tow vehicles not equipped with factory tow package wiring
  • Compatible with 2, 4, 6 or 8-brake systems (1-4 axles)
  • Designed for use with CURT quick plugs #51515 or #51516
  • Brake controller and trailer connector are not included

CURT 58361 30-Amp Universal Circuit Breaker (QTY 1)

Manufactured by: Curt

Whether you're a contractor on your way to the jobsite or just a casual fisherman heading to the boat landing, you need working trailer lights to tow safely and legally For any towing setup, CURT offers quality wiring components, including complete wiring kits, circuit breakers, wiring connectors and more This universal circuit breaker is rated for 30 amps and recommended for applications where over-current protection is required..

Features:

  • Recommended for applications where over-current protection is required

CURT 51170 Spectrum Original Equipment Style, Integrated Electric Trailer Brake Controller, Proportional (QTY 1)

Manufactured by: Curt

The CURT Spectrum trailer brake controller provides powerful brake operation while maintaining a clean, consistent OE look and feel on the dash of your vehicle It is comprised of a main module and a separate user interface This interface is a simple rotary knob with a push-button and ten tri-color LEDs to control and monitor all trailer brake activity.

It also features a triple-axis accelerometer for highly responsive, smooth stops on any grade The separated module and interface of the Spectrum brake controller allow it to integrate with the vehicle unlike any other The main module can be mounted behind the dash and completely out of sight.

The separate rotary knob provides a sleek, subtle interface that mounts on the dash of the vehicle wherever desired It features ten LEDs with three colors each (red, green and blue) to indicate trailer brake activity and power adjustment The rotary knob and integrated push-button allow for simple and effective operation of the control settings and manual adjustment.

The Spectrum trailer brake controller offers superior safety and helps protect the life of your vehicle and trailer with its advanced triple-axis accelerometer This integrated circuit detects the motion of the vehicle and trailer when making stops and applies the precise amount of brake power for maximum efficiency and effectiveness The three axes of the circuit also enable the brake control to compensate when going up or down a hill.

Like most CURT brake controllers, the Spectrum installs using one of our vehicle-specific quick plug harnesses It also has automated leveling and calibration capabilities to simplify and speed up the installation process The Spectrum trailer brake controller comes with mounting hardware for a complete installation..

Features:

  • Controls all brake settings with a simple push-button rotary knob
  • Clean, dash-mounted, OEM-style user interface with 10 tri-color LEDs
  • Main module can be mounted out of sight
  • Triple-axis, motion-sensing accelerometer for highly responsive, smooth stops
  • Easily accessible manual override with the press of a button
  • Features two installation options: drill mount or surface adhesive mount
  • Automatic leveling and calibration eliminate setup requirements
  • Plug-and-play install with vehicle-specific quick plug harness (sold separately)
  • Operates 2-8 trailer brakes at a time (1-4 axles)
  • Built-in reverse-polarity and short-circuit protection
  • Compatible with low-volt, PWM, ABS, cruise control and electric over hydraulic
  • Tow vehicle 'low voltage' and trailer disconnect indicators
  • Limited lifetime warranty

CURT 51530 Quick Plug Electric Trailer Brake Controller Wiring Harness (QTY 1)

Manufactured by: Curt

A CURT Quick Plug brake controller wiring adapter is one of the fastest and easiest ways to plug your brake controller into your vehicle It requires no cutting or splicing! Just insert the vehicle-specific plug end into the OEM vehicle’s factory brake controller socket The other end plugs into your CURT trailer brake controller.

Quick Plug harnesses are available for a variety of vehicles and are unique for each vehicle application to provide the easiest possible installation This particular brake controller harness fits certain years of the Mazda CX-50 and CX-90 (see application info to verify fitment) CURT Quick Plug harnesses are compatible with most CURT brake controls and can be used as a replacement or for a new control unit installation.

They're also great for towing all types of trailers with electric brakes For versatile mounting of your trailer brake controller this Quick Plug wire harness measures two feet long It also features a slit loom sleeve to keep the wires protected against crushing and abrasions.

CURT Quick Plug wire plug-in adapters are made with 12-gauge wires for a reliable connection and braking, and come with zip ties to keep the harness contained and out of sight..

Features:

  • Allows a CURT trailer brake controller to be plugged into OEM socket
  • Quick plug harness installs with plug-and-play convenience
  • Wire colors match standard brake controller harnesses
  • Includes 24" of 12 gauge wire for flexible installation
  • Slit-loom sleeve keeps wires contained and protected

List of Fitment Years:

2025, 2024
Hitches Near Me: We operate out of several warehouses across the country, ensuring faster delivery to your location.

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