Jamarco 4in Round LED Trailer Tail Light Kit, 25ft Harness — IP67 Waterproof Plug-and-Play

Jamarco's 4" Round LED Trailer Tail Lights Kit is a complete 12V lighting package that supplies two 4" multifunction LED tail lights, six mini marker lights, a 13.8" LED third-brake ID bar, reflective stickers and a 25-foot 4-pin wiring harness for fast installation.

This kit is built for trailers, campers, trucks and other 12V vehicles needing a weatherproof, plug-and-play lighting upgrade. The main round lamps combine stop, tail and turn functions using 24 LEDs each, while the included mini side markers and the 13.8" third-brake light improve visibility from the side and rear. IP67-rated housings and rubber grommet mounts resist dust, moisture and road debris for reliable on-road performance.

How do the 4" round LED lights work for stop, tail and turn?

Each 4" round lamp uses 24 red LEDs arranged to deliver two brightness levels: a high-intensity output for stop/turn signals and a lower running-light mode for tail illumination. The lamp pigtail has three wires so you can connect ground, stop/turn and tail circuits separately for standard trailer wiring setups.

• White = ground connection for safe circuit return
• Red = high-brightness stop and turn function
• Black = low-brightness tail/running light
• Approx. 5" outer grommet diameter with 4" inner lamp diameter

What comes in the kit and what wiring is included?

This package includes everything needed to outfit a typical small trailer or utility vehicle: two round LED tail lights, six mini marker/clearance lights (four red side markers and two red rear markers), a 13.8" 15-LED third brake identification bar, reflective stickers and a full 25-foot wiring harness with a 4-pin flat plug.

• 25ft 4-pin flat wiring harness for reach and easy vehicle connection
• Pre-wired pigtails on each lamp for straightforward installation
• Surface-mount or grommet installation options depending on trailer style
• Reflective stickers included to boost low-light visibility

Are these lights durable and compatible with my trailer?

Jamarco designed the housings to meet harsh-environment needs: IP67 waterproof rating, corrosion-resistant LEDs and grommet mounts to seal out water and dust. The kit is compatible with most 12V DC systems on trailers, campers, small trucks, ATVs and similar vehicles that use standard trailer wiring.

• IP67 protection against water ingress and dust
• Works with standard 12V trailer wiring and 4-pin flat connectors
• Rubber grommet provides vibration isolation and a sealed mount
• Surface-mount brake bar for third-brake legal visibility

Who is this kit designed for? If you tow a small trailer, haul equipment, run a utility trailer or maintain a camper and need a straightforward, weatherproof lighting upgrade, this kit is built for you. It suits DIY installers and fleet managers who want clear stop/turn/tail signaling, added side and rear markers, and a visible third-brake identification light. Installers who prefer plug-and-play wiring will appreciate the included 25-foot harness and pre-wired pigtails; mechanics and hobbyists will value the robust IP67 construction for long-lasting roadside reliability. For any setup questions or post-purchase support, Jamarco offers customer help to resolve issues quickly.