Partswcgg 12V LED Trailer Tail Light Wire Kit with 25ft 4‑Flat Harness — Submersible, Complete Lighting Set

The Partswcgg 12V LED Utility Trailer Tail Light Wire Kit is a complete, submersible lighting package that upgrades rear, side and ID lights and includes a 25ft 4-flat wiring harness for trailers.

This all-in-one kit combines square rear combination lights, mini oval side markers, a 15" third brake light bar, a 14.17" three-light identification marker, license plate illumination, mounting hardware and a long wiring harness so you can replace or upgrade trailer lights quickly. Each lamp is sealed for waterproof operation, and the wiring harness provides enough length to reach from most tow vehicles to the rear of common trailer decks.

What components are included and what do they do?

The kit contains every lamp and accessory needed for a full exterior lighting refresh on utility, boat, or general-purpose trailers. Lights perform standard functions—running, stop, turn, side marker, and clearance—while hardware and the bracket make installation straightforward.

• 2 square rear combination tail lights (multi-function stop/turn/tail/reflector)
• 6 mini oval side fender marker lights (2 red, 4 amber) for side visibility
• 2 × 15" trailer third brake light bars for increased rear signaling
• 14.17" 3-red LED identification/clearance light bar for wide trailers
• 25ft 4-flat wiring harness with plug, license plate bracket, and mounting hardware

How is this kit wired and which wires control each function?

The harness and each lamp use conventional trailer color codes, with a few lamp-specific connections noted in the included wiring tips. Using standard colors lets you hook the kit to common 4-flat systems or splice into individual circuits if you have a custom setup.

• Square tail lights: white = ground, yellow = bright (brake/turn), brown = low (running/license)
• 15" tail light bars: white = ground, red = bright (brake/stop/turn), black = low (running)
• Mini side markers: white = ground, black = positive supply for each marker
• 25ft harness: 4-flat connector standard for trailer-to-vehicle plug-and-play

Are these lights waterproof and suitable for boat trailers?

Yes—the LED housings are fully sealed so water cannot penetrate the circuit boards. The submersible design and durable materials make the kit appropriate for occasional submersion and wet environments found in boat-launching or saltwater use.

• Fully sealed lamp housings prevent moisture ingress
• Polycarbonate lenses plus stainless steel base on the ID bar resist corrosion
• Surface-mount design simplifies installation on common trailer frames
• Red and amber LEDs maintain visibility in heavy spray and rain

How easy is installation and what tools or steps are typical?

Installation is designed to be within reach of most DIYers familiar with trailer electrics. The kit includes mounting hardware and a long harness; basic tools and common wire connectors are usually all that's needed.

• Surface-mount lamps bolt onto trailer frame using included hardware
• 25ft harness reaches from vehicle plug to rear lights on most trailers
• Follow color-code wiring tips for correct function mapping and grounds
• Use marine-grade sealant and corrosion-resistant fasteners for longevity

Who is this for? If you own a utility, boat, or general-purpose trailer and need a comprehensive, weatherproof lighting upgrade that covers rear, side and clearance lighting, this Partswcgg kit is built to cover everything in one purchase. It suits do-it-yourself installers and small fleet operators who want a durable, sealed LED solution with a long wiring harness and the hardware required for a clean, compliant installation. For any questions about compatibility or wire connections, reach out to the seller for guidance before installation.