Identify CURT Trailer Wiring Harnesses by SUV Year & Trim
CURT custom 4-way trailer-light harnesses use vehicle-specific connectors, even when the visible four-flat trailer plug is the same. Ford Edge SE/SEL requires a different harness from Sport/Titanium; Ford Escape and Mazda CX-5 applications change by year. This reference identifies six exact CURT numbers without assuming other years or trims fit.
Distinguish the vehicle connection
Ford Edge
2015–2018 SE/SEL: CURT 56272. Sport/Titanium of the same years: CURT 56292. Trim package determines the correct listed part.
Ford Escape
CURT 56335 covers listed 2013–2016 trims. CURT 56320 covers 2017–2018, excluding SE. Don't assume every year/trim uses one plug arrangement.
Mazda CX-5
CURT 56310 is listed for 2016, while 56377 covers 2017–2021. Model year is the primary distinction in this pair.
Part numbers and listed applications
| CURT MPN | Vehicle | Model years | Fitment qualifier | Output |
|---|---|---|---|---|
| 56272 | Ford Edge | 2015–2018 | SE or SEL | 4-way flat |
| 56292 | Ford Edge | 2015–2018 | Sport or Titanium | 4-way flat |
| 56335 | Ford Escape | 2013–2016 | S, SE, Titanium; SEL only 2013 | 4-way flat |
| 56320 | Ford Escape | 2017–2018 | Excluding SE | 4-way flat |
| 56310 | Mazda CX-5 | 2016 | Listed 2016 model | 4-way flat |
| 56377 | Mazda CX-5 | 2017–2021 | Listed model years | 4-way flat |
Inspect a vehicle-specific harness
- Read the CURT manufacturer number from the converter or label rather than relying on the four-flat trailer end.
- Match the vehicle's actual model year, trim and taillight connector design. For 2015–2018 Edge models, SE/SEL and Sport/Titanium are distinct.
- Check the powered converter, battery feed, fuse holder, T-connectors, ground connection and 4-way socket for corrosion, cuts or previous splices.
- Inspect connectors for broken latches, missing seals or damage. A used harness should be electrically tested after correct installation.
- Confirm what the particular listing supplies, then follow CURT's exact MPN instructions and the vehicle owner's towing guidance.
UsedRVParts viewing and pickup in Kelowna are by appointment. A matching four-flat plug alone does not prove that a used wiring module fits a particular vehicle.
Find a matching harness by exact number
Each linked listing provides the individual item details and availability.
CURT 56377 · Mazda CX-5
2017–2021 · Listed model years
Not for the separate 2016 harness application
Other towing electrical references
For towing connections behind the bumper, see CURT receiver hitch pin and lock identification for the separate mechanical hitch hardware.
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