Jamarco 4" Round LED Trailer Tail Lights Kit — 25ft Harness, IP67 Weatherproof, 13.8" Brake Bar

Jamarco's kit is a complete 12V trailer lighting solution: two 4" round LED stop/tail/turn lamps, a 13.8" 3rd-brake LED bar, six mini side marker LEDs, a 25ft 4-pin wiring harness and four reflectors.

This all-in-one package supplies the core exterior lights and wiring most trailers, campers, utility rigs and small commercial vehicles need for road-legal signaling. The LEDs are IP67-rated for wet and dusty conditions, use simple three-wire grommet mounts for the round lamps, and include a surface-mount third brake bar plus mini marker lights so you can outfit sides, rear and center brake identification without hunting parts separately.

How do these lights install on a typical trailer?

Installation is straightforward for users comfortable with basic trailer wiring and drilling. The two 4" round lights mount with rubber grommets that fit an approximately 4.5" hole for a flush appearance; their pigtail wires connect to the included 25ft harness and standard 4-pin flat plug. The 13.8" LED bar mounts on the surface with supplied screws, and the six mini markers surface-mount with small fasteners.

• 4" round lights: rubber grommet mount, approx. 5" outer ring, 4" inner diameter
• Wiring: white = ground, red = brake/turn (bright), black = tail/run (dim)
• 13.8" bar: surface mounts, three-wire connection like round lights
• Mini markers: compact surface mount, four red plus two amber markers included

What performance and weather protection can I expect?

The LEDs are built to be durable and visible: the round lamps house 24 LEDs under red lenses and the third-brake bar uses 15 high-output LEDs to increase rear visibility. Components are rated IP67, meaning they are dust-tight and protected against immersion to shallow depths for short periods—suitable for rain, mud and typical road spray.

• IP67 waterproof rating for resistance to dust and water ingress
• High-output LED arrays for clear stop, turn and tail illumination
• Durable red polycarbonate lenses and sealed grommet mounts
• Reflective stickers included to boost nighttime conspicuity

Will this kit work with my vehicle’s electrical system?

The kit is designed for 12V DC trailer systems and uses the common 4-pin flat connector so it plugs into most towing vehicles without adapters. Wiring follows conventional color coding and includes long harness length for flexible placement; verify your tow vehicle provides a standard 4-pin output and that mounting holes accommodate the grommet dimensions.

• Designed for standard 12V DC trailer electrical systems
• Includes 25ft harness with 4-pin flat plug for easy hookup
• Standard wire color code: white (ground), black (tail), red (stop/turn)
• Universal fit for trailers, campers, trucks, tractors, boats, etc.

Who is this for: This Jamarco kit suits trailer owners, small fleet operators and DIY hobbyists who want a single purchase to upgrade or replace rear and side exterior lights. It’s ideal when you need reliable, weather-resistant LEDs, straightforward color-coded wiring and enough harness length to place lights where they’ll be most visible. If you manage utility trailers, campers, small commercial rigs or agricultural equipment and want a ready-to-install lighting package, this kit covers the common rear, center and side lighting needs without sourcing multiple parts separately.