CURT 4-Way Trailer Wiring Harness for Ford E-Series (E-150/E-250/E-350) — Vehicle-Side Plug-In, OEM-Style

The CURT 56020 is a vehicle-specific, plug-and-play 4-way flat trailer wiring harness designed to add a reliable trailer connector to compatible Ford E‑Series vans without cutting or splicing.

If your Ford E-150, E-250 or E-350 lacks a factory trailer connector, the CURT 56020 gives you a factory-like 4-way flat socket by plugging directly into the taillight assemblies. Built to match the vehicle's OEM wiring, this custom harness supplies tail, brake and turn signal circuits in a single, compact plug, and ships with a dust cover and all required components to finish installation cleanly and quickly.

How does this harness install on my Ford E‑Series?

Installation is straightforward: the harness uses vehicle-specific connectors that mate with the factory taillight plugs, avoiding wire cutting, splicing, or soldering. Most installs can be completed with basic hand tools and follow clear routing paths to the rear bumper area.

• Vehicle-matched plugs for direct connection to taillight sockets
• No permanent wiring modifications required
• Includes hardware and instructions for a tidy mounting location

What electrical functions will the 4-way flat provide?

The 4-way flat output delivers standard trailer lighting signals—running lights, left/right turn signals, and brake lights—so your trailer lighting mirrors the vehicle's. It does not provide vehicle battery power or trailer brakes; those require separate adapters or 7-way solutions.

• Runs tail lights, brake lights and both turn signals
• Works with most basic lighting-only trailers and lights
• Compact flat-profile connector keeps hitch area tidy

Will the CURT 56020 fit my specific year of E-150/E-250/E-350?

This is a model-specific harness made for particular Ford E-Series years—confirm compatibility with the product's application guide or your vehicle's connector type before ordering. Using the correct fitment prevents electrical mismatches and simplifies installation.

• Designed for specific Ford E-Series model years—check application info
• OEM-style connector ensures proper alignment and function
• Easy verification by comparing taillight plug shapes and mounts

How does the harness hold up when not in use or in bad weather?

The kit includes a dust cover to protect the flat connector from dirt and moisture when it's not connected to a trailer. The connector and wiring use durable materials intended for vehicle exterior use, helping maintain dependable contacts over time.

• Dust cover keeps contacts clean and reduces corrosion risk
• Weather-resistant connector housing for exterior mounting
• Wiring routed for protection from road debris and heat sources

Who this is for: The CURT 56020 suits Ford E-150, E-250 and E-350 owners who need a simple, factory-like trailer lighting connection without modifying their vehicle's wiring. It's ideal for DIY installers, contractors hauling work trailers, weekend boaters with lighting-only trailers, and anyone seeking a secure, reversible wiring solution backed by a limited one-year warranty.

• 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
• Dust cover included to keep connector clean when not in use
• Backed by a limited one-year warranty