Partsam LED Trailer Light Kit for Under 80" Trailers — Submersible 25ft Harness, Square Stop/Turn/Tail

Partsam's submersible 12V LED trailer light kit is a complete waterproof lighting solution that includes square combination stop/turn/tail lights, six side marker lamps, a 15" 3rd brake ID light bar, 25ft wiring harness and all mounting hardware for trailers up to about 80" wide.

This kit bundles every exterior light you need to upgrade or replace trailer, RV, camper, utility or boat lighting in one purchase. The set is engineered for simple installation with a long 25-foot harness and 4-flat plug, and its sealed LED assemblies resist water, dust and road debris for dependable use in wet or dirty environments.

How does this kit simplify trailer lighting upgrades?

The Partsam kit provides a plug-and-play approach: two square combo tail lights, six mini oval side markers, a 15" identification brake bar, bracketry, and a full-length wiring harness all arrive together. You avoid sourcing individual parts and matching colors or output levels.

• Comes with license plate bracket and mounting hardware for immediate fitment.
• 25ft wiring harness with 4-flat plug reaches most trailer frames without splicing.
• All lights are 12V and matched for consistent brightness and color.

What lighting functions are included and where will they work?

Each light serves multiple roles: running lights, brake/stop, turn indicators, reverse/flash functions on combination units, plus side marker and license plate illumination. This makes the kit suitable for rear, side, and center ID requirements on road-going trailers and RVs.

• Square combos handle stop, turn, tail, reverse and reflector duties.
• Mini oval side markers come in red and amber for curb/street-side identification.
• 15" ID brake light provides a high-mounted center stop/identification signal.

How durable and weatherproof are the lights?

Partsam designed these LED assemblies to be fully sealed so water and contaminants can’t enter and damage internal circuits. The housings and lens fastenings reduce leak points, making them suitable for wet climates, marine trailers and winter use.

• Sealed, submersible construction prevents water and dust ingress.
• LED modules use multiple diodes for heat distribution and longer lifespan.
• Lens/screw layout minimizes entry points for snow, sand or road grime.

Will this fit my vehicle and meet visibility needs?

Designed for most 12V trailers roughly 80 inches wide (plus or minus), the set works on campers, utility trailers, trucks, dump trailers, boats and more. The combination of high LED counts and mixed diode types produces strong rear and side visibility without high current draw.

• Suitable for vehicles with a 12V electrical system and up to ~80" width.
• High diode counts (multiple red and white diodes) for brighter signaling and reverse illumination.
• Includes both amber and red side markers for regulatory-style side identification.

Who this is for: This kit is aimed at trailer owners, mobile contractors, RV and boat enthusiasts, and fleet operators who want a single, weatherproof lighting package that replaces or upgrades all rear and side lights in one go. It’s particularly useful for anyone needing a long wiring harness, easy installation hardware, and rugged, submersible lighting that stands up to road salt, rain and rough use.