Your account has been temporarily locked, so no orders can be placed at this time. Please contact our accounts receivable department at 877-287-8634 or email [email protected]
PC: E18
UPC: 612314563104

Custom Wiring Harness, 4-Way Flat Output, Select Mazda CX-5 #56310

Loading Price....
  • Plugs into vehicle tail light assembly 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 a powered 3-wire to 2-wire tail light converter
  • 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


  • Battery connection must be fuse-protected (10-amp max)
  • Includes fuse holder, battery connection wiring and other necessary wiring components



Guides & Install Sheets

Product Videos

  • Product Videos CURT Custom Wiring & Taillight Converters Introduction
  • Product Videos Trailer Wiring Install: CURT 56310 Taillight Converter on a Mazda CX-5


  • MaterialBlank
  • Battery-PoweredYes
  • Installation DifficultyDifficult
  • Shipping Weight1.606
  • Part TypeCustom Wiring Harness
  • WarrantyOne-Year Limited Warranty
  • T-Connector LocationS1,S2
  • Turn and Brake Circuits3.0 Amps
  • Tail Light Circuits6.0 Amps
  • Electrical System Type3W
  • Output Type4-Way Flat
  • Converter TypeCircuit Protected and Powered

Making memories doesn't start when you reach your destination; it starts at the very first mile of your journey. Wherever your road begins and wherever it takes you, Bring It® with the power of CURT.

CURT custom wiring provides everything you need to connect your vehicle's electrical system to a trailer. With plug-and-play connectors, a custom wiring harness easily integrates with your vehicle taillights to provide a standard trailer wiring connector, typically in the form of a 4-way flat.

This custom wiring harness features a vehicle-specific design to perfectly fit certain years of the Mazda CX5 (to verify vehicle compatibility, see the CURT application guide or use the Vehicle Lookup on the CURT website). It uses OEM-compatible connectors to "T" into the vehicle's taillight assembly and provides a standard 4-way flat output to power the taillights, brake lights and turn signals on your trailer.

To complete this custom wiring harness, it comes with a rubber dust cover. This cover keeps the connection points clean and well protected when the connector is not in use. Once installed, the connector can also be conveniently mounted on the vehicle's trailer hitch receiver tube, using a CURT Easy-Mount connector bracket. The bracket mounts onto the trailer hitch with no drilling required, and its powder-coated steel construction provides a solid attachment point for plugging in the trailer wiring.

2016 Mazda CX-5 ALL 45

2 Item(s)

Show per page
  1. 100%


    Great harness

    First one that I ordered was defective. Called the company and they sent me a second one. No issues with sending a new one. Install went great. Suggest getting a 10 amp 12V plug. On the CX5 (2016) there is a socked on the passenger side rear cargo area. I connect to there when ever I tow. No need to run wire to battery. Unplug and store in spare tire compartment when not in use.
    Unit is 4 stars (first one was dud), but the customer service makes up for the last one. Spot on. Thanks!

  2. 60%


    Semi-Straigthforward Need more videos!

    I youtubed majority of the work; however the hardest part (wiring it to the battery) was not able to be found. So I need to find professional help for this part, because the bottom of my car is protected. This really was really disappointing considering the 2015 was able to just be plugged into the tail lights. Not sure why this one can't run similarly, but this just made this project significantly more time consuming and difficult. If you can finish this in 45 minutes and are not a mechanic, you should be a mechanic...

2 Item(s)

Show per page
Write Your Own Review
You're reviewing:Custom Wiring Harness, 4-Way Flat Output, Select Mazda CX-5
Your Rating