DICMIC Trailer Wiring Harness 4 & 7-Pin for 1999–2001 Ford F250/F350 Super Duty — Direct-Fit, Plug-and-Play

DICMIC 4 & 7 Pin Trailer Tow Wiring Harness is a direct-fit replacement wiring plug designed to restore full trailer lighting and brake power on 1999–2001 Ford F250 and F350 Super Duty trucks.

If your truck’s trailer connector is corroded, damaged, or failing, this wiring harness matches the factory plug and replacement part number YC3Z-13A576-CA. Built as a plug-and-play, surface-mount technology assembly, it reconnects tail, brake, reverse, turn, auxiliary power, and electric brake circuits without cutting or splicing factory wiring. The unit includes a multi-tow bracket, a spring-loaded dust cover for the 7-way blade, and a sealed tubing conduit to protect wires from road debris and moisture.

How does this harness restore trailer lighting quickly?

Because it’s a direct replacement for the factory connector, installation requires no wire modifications and reconnects all trailer lighting circuits to factory wiring points. The harness uses surface-mount components to resist vibration-related failures common on trucks used for towing.

• Direct-fit YC3Z-13A576-CA replacement — aligns with factory mounting points.
• Plug-and-play design — no splicing or extra adapters needed.
• Surface-mount tech — better vibration resistance than through-hole assemblies.
• Includes bracket for secure chassis mounting.

Will this wiring harness protect connections from the elements?

Yes — the kit includes a spring-loaded dust cover for the 7-way blade and a black sealed tubing conduit to keep wires bundled and shielded. Those features reduce moisture and debris intrusion, prolonging connector life when hauling in wet or dusty conditions.

• Spring-loaded dust cover seals socket when not in use.
• Sealed tubing protects wires from abrasion and road grime.
• Durable plastic housing resists corrosion and UV exposure.
• Compact bracket helps keep connector off the roadway.

How simple is installation for a home mechanic?

Installation is straightforward: unplug the old connector, seat the DICMIC harness into the factory plug location, and secure the bracket. No specialized tools or wiring diagrams are needed for most installs, saving time and avoiding accidental wiring mistakes.

• Unplug old connector — plug in the DICMIC unit.
• No cutting, soldering, or splicing required.
• Compatible with 1999–2001 Ford F250 and F350 Super Duty models.
• Hardware and bracket included for secure mounting.

What circuits and trailer functions does the harness support?

This multi-connector supports standard 4‑pin lighting and an additional 7‑way blade that supplies reverse, auxiliary power, and electric brake control. It reconnects all commonly used trailer functions so you can tow safely and legally.

• Tail, brake, and turn signal circuits.
• Reverse and backup light feed via 7-way blade.
• Auxiliary 12V power for trailer accessories.
• Electric trailer brake control circuit supported.

Who is this for: Owners of 1999–2001 Ford F250 or F350 Super Duty trucks who need a reliable, OEM-style replacement trailer connector. It’s aimed at vehicle owners and DIY mechanics who want a plug-and-play solution to restore trailer lights and brake control without modifying factory wiring. Fleet managers and towing professionals who require durable, vibration-resistant hardware will also benefit from the sealed tubing, spring-loaded dust cover, and robust mounting bracket.