At a Glance

> Connector Check: Confirm the truck-side plug matches the replacement harness before installation.
> Function Check: Verify trailer lights, electric brake feed, reverse light circuit, and auxiliary power needs.
> Install Check: Inspect the existing harness for corrosion, broken terminals, damaged insulation, or loose connector fit.
> Check the Existing Plug: Look for corrosion, bent pins, loose terminals, moisture, or cracked plastic.
> Check Circuit Function: Test tail lights, brake lights, turn signals, reverse lights, electric brake output, and auxiliary power individually.
Brand: R & P Carriages
SKU: C55243

Before You Order

Match the part number, measurements and connection points that apply to your trailer.

Function	Confirm stop, turn, tail, marker or clearance function.
Mount	Verify housing and mounting style.
Connection	Match the plug, pigtail or wiring.

Product Details

Trailer Electrical / Vehicle Side Wiring Harness

1999-2001 Ford Replacement OEM 7way Wiring Harness Rect. Connector 7 Way Plug & 2 Fuses and Relays

Vehicle-side 7 pin trailer wiring harness replacement for listed Ford Super Duty applications. Built for plug-and-play installation with no cutting or splicing required.

SKU : C55243 1999-2001 Ford Super Duty Includes Fuses & Relays

Key Specs

Specification	Detail
Product Type	Vehicle-side trailer wiring harness
Trailer Connector	7 pin trailer connector
Installation Style	Plug-and-play design
Cutting / Splicing	No cutting or splicing required
Included Electrical Parts	Two 30 amp fuses and two relays
Quantity Included	One wiring harness kit

Fitment

Category	Details
Vehicle Make	Ford
Model Years	1999, 2000, 2001
Primary Fit	F-250 Super Duty, F-350 Super Duty, F-450 Super Duty, and F-550 Super Duty
Fitment Method	Verify vehicle year, model, factory connector style, and trailer wiring configuration before ordering
Important Note	Application reference only. Confirm connector match before installation.

Top Features

Feature	Buyer Benefit
7 Pin Trailer Output	Supports common trailer lighting, brake, reverse, auxiliary power, and electric brake wiring functions.
Vehicle Side Replacement	Replaces the truck-side trailer harness on compatible listed Ford Super Duty applications.
Plug-and-Play Design	Designed to install without cutting or splicing into the vehicle wiring.
Fuses and Relays Included	Includes two 30 amp fuses and two relays for installation support.

Overview

This 7 pin trailer wiring harness is a vehicle-side replacement harness for select 1999-2001 Ford Super Duty trucks, including F-250, F-350, F-450, and F-550 Super Duty models. It is intended for trailer wiring functions such as tail lights, brake lights, reverse lights, turn signals, electric trailer brakes, and auxiliary power.

R&P Service Insight

A trailer wiring harness should be matched by vehicle application and connector style, not by year range alone. Before ordering, compare the existing vehicle-side connector and confirm the truck is equipped for the trailer wiring functions needed.

Connector Check: Confirm the truck-side plug matches the replacement harness before installation.
Function Check: Verify trailer lights, electric brake feed, reverse light circuit, and auxiliary power needs.
Install Check: Inspect the existing harness for corrosion, broken terminals, damaged insulation, or loose connector fit.

R&P Knowledge Hub

Compatibility: Listed for 1999-2001 Ford F-250 Super Duty, F-350 Super Duty, F-450 Super Duty, and F-550 Super Duty applications. Verify before ordering.

Vehicle / System Fit: Vehicle-side 7 pin trailer wiring harness for trailer lighting, electric brake, reverse light, and auxiliary power circuits.

Installation Notes: This harness is described as plug-and-play with no cutting or splicing required. Always compare the existing vehicle connector before installation.

Performance Insight: A clean, properly connected 7 pin vehicle harness helps maintain reliable trailer lighting, brake control signal, and auxiliary trailer power transfer.

Brand & Fitment Note

Selling Brand: R&P Carriages

Application Reference: Ford and Super Duty model names are used only to identify listed compatibility applications.

What This Means: This listing is for a replacement 7 pin vehicle-side trailer wiring harness kit, not a guaranteed OEM-branded item unless specifically stated and verified.

Before Ordering: Verify vehicle year, model, factory connector style, wiring configuration, and included components before installation.

R&P Repair Insight

Trailer wiring issues can come from the truck harness, trailer plug, trailer wiring, grounds, fuses, relays, brake controller wiring, or connector corrosion. Confirm the source of the issue before replacing parts.

Check the Existing Plug: Look for corrosion, bent pins, loose terminals, moisture, or cracked plastic.
Check Circuit Function: Test tail lights, brake lights, turn signals, reverse lights, electric brake output, and auxiliary power individually.
Check Fuses and Relays: Replace or verify fuse and relay condition as part of the trailer wiring repair process.

Features

7 Pin Trailer Wiring Connection

Supports the common 7 pin trailer wiring functions used for lighting, braking, reverse, and auxiliary power circuits.

Ford Super Duty Application

Listed for 1999-2001 Ford F-250, F-350, F-450, and F-550 Super Duty trucks.

Plug-and-Play Installation

Designed to install without cutting or splicing when matched to the correct vehicle-side connector.

Fuses and Relays Included

Comes with two 30 amp fuses and two relays to support the installation.

Included Components

Quantity	Item
1	7 pin vehicle-side trailer wiring harness
2	30 amp fuses
2	Relays

Important Fitment Note: Verify vehicle year, model, factory connector style, trailer wiring configuration, and included components before installation. Ford and Super Duty references are used for application fitment only.

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1999-2001 Ford Replacement OEM 7way Wiring Harness Rect. Connector 7 Way Plug & 2 Fuses and Relays (C55243)