Wsays Trailer Wiring Harness for Ram ProMaster 1500/2500/3500 (2014–2025) — 4‑Pin Flat Plug‑and‑Play with Dust Cover

Wsays 4‑pin trailer wiring harness provides a direct, vehicle‑matched electrical connection for Ram ProMaster 1500/2500/3500 (2014–2025), delivering reliable tail, turn and brake signal transfer with a protective dust cover.

Designed specifically for Ram ProMaster vans from model years 2014 through 2025, this Wsays harness gives you a factory‑style 4‑pin flat connector that links your trailer’s lighting to the vehicle’s existing tail light circuits. It’s a simple, plug‑and‑play replacement that avoids cutting or splicing into vehicle wiring, and comes with installation instructions and a dust cap to guard the connector from moisture and debris.

How does this harness fit my Ram ProMaster and what years are supported?

This Wsays harness is built to match the factory wiring locations and connectors used on Ram ProMaster 1500, 2500, and 3500 models from 2014 through 2025. Before purchasing, verify your van’s model and year against the fitment list supplied with the product to ensure compatibility.

• Fitment: Ram ProMaster 1500/2500/3500, model years 2014–2025.
• Connector type: Standard 4‑pin flat trailer plug that matches factory harness receptacles.
• Plug orientation: Designed for direct insertion into the factory tail light assembly harness.
• Compatibility check: Confirm vehicle model/year before ordering.

What lighting functions does the 4‑pin harness support?

The Wsays 4‑pin wiring harness transfers basic trailer lighting signals: running lights (tail), left and right turn signals, and brake lights. This covers most small trailers, utility trailers, and light cargo applications where only basic lighting is required.

• Tail/running lights: Carries constant tail lamp power to trailer lights.
• Turn signals: Sends left/right turn inputs to the trailer circuit.
• Brake lights: Transmits stop lamp activation for trailer safety.
• Not included: No trailer brake controller wiring or electric brake control features.

How durable and weather‑resistant is the wiring and connector?

Wsays constructs this harness for long‑term use with a sealed dust cover that protects the 4‑pin flat connector from moisture, dust and corrosion. The wiring and plug use rugged materials suited to the under‑vehicle environment, helping maintain dependable electrical contact over time.

• Dust cover: Protective cap reduces corrosion risk when connector is unused.
• Corrosion resistance: Materials chosen to withstand road and weather exposure.
• Wire protection: Insulation resists abrasion and flex under normal towing conditions.
• Longevity: Built for repeated connect/disconnect cycles.

How easy is installation and what’s included in the package?

Installation is intended to be quick and user‑friendly thanks to a plug‑and‑play connector that mates with the vehicle’s factory tail light harness—no cutting or splicing required in most applications. The kit ships with a single 4‑pin trailer wiring harness and step‑by‑step installation instructions, so you can complete the job with basic tools.

• Installation style: Plug & Play—unplug factory connector and insert the Wsays plug.
• Tools required: Typically minimal; a few basic hand tools may be needed to access the harness.
• Package contents: 1 x 4‑pin trailer wiring harness and installation instructions.
• Support: Refer to vehicle fitment list and instructions included with product.

Who is this for: The Wsays Trailer Wiring Harness is aimed at Ram ProMaster owners who need a straightforward, durable 4‑pin connection for towing small trailers, cargo carriers or utility trailers without the complexity of electric brake systems. It’s especially useful for fleet operators, van converters, and DIY owners seeking a clean, factory‑style electrical hookup that resists weather and simplifies installation.