Malictele 4-Pin 5-Wire Trailer Wiring Harness 22FT — Jacketed 16AWG Y-Style for Dual Taillights, Black

Malictele's 22FT 4-pin, 5-wire trailer wiring harness is a jacketed, 16AWG Y-shaped kit designed to rewire both left and right taillights on trailers, RVs, and boats quickly and reliably.

If your trailer lighting is flickering, partially disconnected, or you need to replace an old harness, this kit gives you the cable length, corrosion-resistant jacket, and split wiring needed to reach both taillights without splicing extra wire. The 4-way flat plug fits standard trailer sockets and the five-conductor layout provides separate runs so turn, brake and taillight circuits are organized and easy to identify.

How does the Y-shaped 5-wire layout simplify rewiring both taillights?

The Y-design separates the taillight circuit into two brown leads so a single harness can feed both left and right lamps without running separate cables down each side of the trailer. That saves time, reduces potential splice points, and creates a cleaner installation that’s easier to troubleshoot.

• Dual brown wires for left and right taillights to avoid extra splices
• Color-coded conductors for clear identification during hookup
• 3.9-foot dedicated ground lead for reliable chassis grounding

Will this harness withstand outdoor and marine environments?

The outer jacket is thick PVC and the internal conductors are 16AWG copper, which together provide resistance to abrasion, moisture, and routine exposure to road debris. While not stainless steel, the build is aimed at long-term trailer use and handles typical wet or damp conditions found with boat trailers.

• Heavy-duty black PVC jacket resists wear and moisture
• 16AWG copper cores balance flexibility and current capacity
• Jacketed cable reduces risk of corrosion at exposed points

Is this kit compatible with my trailer and how long is the cable?

This harness uses a standard 4-way flat plug, so it works with most boat, ATV, and cargo trailers that accept a 4-pin flat connection; it is not intended for motorcycle-specific trailer systems. The full 22-foot length gives you plenty of reach to route along frame rails and drop both taillight runs to the rear corners.

• Standard 4-way flat plug fits common trailer sockets
• Total cable length: 22 feet for flexible routing
• Includes extra ground wire length (about 3.9 feet) for grounding options

How easy is installation for a DIYer?

The harness arrives color-coded and labeled by function so you can match each conductor to your vehicle wiring with minimal testing. With basic tools—wire strippers, connectors, and a volt tester—a typical DIY installer can complete the replacement without professional help.

• Color-coded wires for plug-and-play style connection
• 4-pin flat connector avoids complicated adapters
• Suitable for standard hand tools and basic electrical experience

Who this is for: This Malictele 4-pin, 5-wire harness is aimed at trailer owners who need a reliable, long-length replacement to restore or improve rear lighting—particularly boat, ATV, and cargo trailer owners who want a single harness to feed both taillights. Choose this kit if you value a rugged PVC jacket, clear color coding for faster wiring, and the convenience of a Y-shaped split to avoid extra wiring runs. If your trailer uses a different connector type or motorcycle-specific wiring, check compatibility before purchasing.