Jamarco Trailer Light Box Kit, 2-Piece Welded Steel Housings with 6" Oval LED Tail & 2" Round Marker, Prewired License Plate Mount

Jamarco's 2-piece welded steel trailer light box kit supplies two heavy-duty housing boxes pre-fitted with a 6" oval LED tail light, a 2" round side marker LED, and license plate mounting for a ready-to-weld trailer lighting solution.

This kit brings together durable steel housings, corrosion-resistant powder coat, and bright LED lamps so you can mount a complete rear lighting assembly quickly on a trailer or truck frame. Each box arrives with the lights installed and pigtails ready for wiring, cutting down fabrication time and eliminating the need to separately source compatible fixtures. The package is made for practical field installation and visibility in low-light or poor-weather conditions.

How do these welded light boxes simplify trailer wiring and installation?

The housings come with pre-cut openings, lights already installed, and color-coded pigtails, so you avoid measuring and drilling for each fixture. They’re designed to be welded or bolted directly to a frame, giving a secure attachment point and consistent placement.

• Pre-mounted 6" oval LED tail light and 2" round LED marker light in each box
• Color-coded wires: white ground, black low/tail or side light, red high/stop/turn for oval
• Pre-cut hole and license plate mounting provision on each box
• Direct weld or bolt-on installation saves fabrication time

What durability features protect the lights and housing?

The boxes are fabricated from heavy-gauge steel and finished with a black powder coat, offering resistance to chips, abrasion, and outdoor exposure. LED lamps are sealed with rubber grommets for waterproofing so the electrical connections are protected from moisture and road debris.

• Welded steel boxes for structural strength and impact resistance
• Quality black powder-coat finish for corrosion protection
• Rubber grommets around lamp housings for watertight seals
• LED modules rated for long life and high visibility

How bright are the included LEDs and how do they function?

The 6" oval tail lights each contain 10 red LEDs, offering strong output for tail, stop, and turn functions; the 2" round side marker lights use 4 red LEDs for visible side signaling. The oval uses a three-wire design to separate ground, low/tail, and high/stop/turn circuits for clear, multi-function operation.

• 6" oval LED: 10 red diodes; three-prong pigtail for ground, tail, stop/turn
• 2" round marker: 4 red diodes; two-prong pigtail with grommeted seal
• Waterproof lamps suited for night, rain, and fog conditions
• Improved visibility helps other drivers see brake and turn signals

What wiring details should installers expect?

Wires are clearly identified for straightforward hookup: white is ground, black handles low/tail or marker light power, and red on the oval controls the brighter stop/turn/ brake function. The lamps include ring-terminal-ready ground leads and insulated pigtails to tie into a trailer harness or vehicle wiring.

• Oval tail lights: white = ground (with O-ring terminal), black = tail/low, red = stop/turn high
• Round side markers: white = ground (with O-ring terminal), black = marker power
• Grommeted wires protect against chafing where they pass through the steel box
• Compatible with standard 12V trailer electrical systems

Who this is for: This Jamarco kit fits fabricators, trailer builders, truck owners, and DIYers who need a robust, pre-assembled rear lighting solution that reduces shop time. It’s ideal when you want welded-on durability, bright LED signaling, and a one-package option that includes housings, lamps, and license plate provision for commercial trailers, utility trailers, horse trailers, and work trucks.