Malictele Trailer Wiring Harness 50ft 16AWG 4-Pin 5-Wire Y-Branch for Dual Taillights, Weatherproof

Malictele's 50ft 4-pin, 5-wire trailer wiring harness is a jacketed 16AWG cable with a Y-shape design that lets you rewire both left and right taillights quickly and reliably.

This heavy-duty trailer wiring kit is built for trailers, RVs, and boat trailers that need a long, weather-resistant run and separate taillight feeds. The cable uses thickened PVC sheathing over 16 AWG copper conductors and arrives with color-coded wires and a standard 4-way flat plug so you can connect turn signals, brakes, and running lights without guessing which conductor goes where. The Y-branch splits the taillight circuit into dual brown leads for simultaneous left and right lamp connections, simplifying rewiring on trailers with separate lamp circuits.

How does this harness make rewiring both taillights easier?

The kit’s Y-shaped wiring splits the taillight circuit into two brown leads, so both left and right tail/brake lamps can be wired from a single harness run. Color-coded conductors reduce identification mistakes during installation.

• Y-shape branch provides two brown leads for separate left/right taillight connections.
• Color-coded wires speed up identification for turn, brake, tail, and ground circuits.
• 3.9 ft ground wire included for flexible and secure chassis grounding.

Will the cable hold up outdoors and in wet conditions?

The outer jacket is a thick PVC sheathing that resists corrosion, abrasion, and moisture exposure commonly found on trailers and boat yards. Inside are 16 AWG copper conductors designed for consistent conductivity over long runs.

• Reinforced PVC jacket shields wires from abrasion and UV exposure.
• 16 AWG copper cores offer reliable current flow for lighting circuits.
• Designed for trailer and marine use (avoid motorcycle-specific wiring systems).

Is this harness compatible with my trailer and vehicle plug?

This harness uses a standard 4-way flat plug, the most widely used trailer connector type for small trailers, boat trailers, and utility trailers. Confirm your tow vehicle has a 4-way flat socket; this kit is not meant for motorcycle-style connectors or 7-pin systems.

• Standard 4-way flat connector fits most trailers and tow vehicles.
• Not compatible with 7-pin or motorcycle-specific plugs—check connector type before buying.
• Ideal for ATVs, utility trailers, small boats, and cargo trailers.

How long is the cable and what installation flexibility does it provide?

At 50 feet total length, the harness gives plenty of reach for long trailers or routing along frames and rails. An included 3.9-foot ground lead and the split taillight leads let you position and secure connections where they best fit the trailer layout.

• 50 ft total length covers large trailer runs and creative routing options.
• 3.9 ft ground wire allows flexible grounding to the trailer frame.
• Color coding and jacketed cable simplify long-distance wiring runs.

Who is this for: This Malictele wiring harness is designed for trailer owners, DIY mechanics, and fleet maintainers who need a durable, long-length 4-way flat harness that splits taillights into separate feeds. It’s especially useful for boat trailers, utility trailers, and cargo trailers that require a weather-resistant cable and straightforward installation, but it’s not intended for 7-pin or motorcycle trailer wiring systems.