LIMICAR 35ft 4-Wire Trailer Wiring Harness — 4-Way Flat, 18 AWG Color-Coded

The LIMICAR 35FT 4 Wire Trailer Wire is a 35-foot, 4-pin flat trailer wiring harness that provides color-coded 18 AWG wires and an extended 42-inch ground for simple, reliable lighting hookups on trailers under or over 80" wide.

When you need a straightforward, weather-resistant wiring harness to connect trailer lights, this LIMICAR kit gives you the length and basic circuits required for tail, stop/turn, and ground connections. Designed for common utility, boat, ATV, and horse trailers that use a 4-way flat connector, the harness balances flexibility with durability so you can route wire down both sides of a trailer tongue without stressing the cable.

How will this harness fit my trailer and truck?

The 35-foot main run is long enough to span trailers that are shorter or longer than 80 inches, and the ground lead extends 42 inches to reach a convenient chassis point. It connects to any vehicle with a standard 4-way flat plug and splits at the tongue so you can route wiring along each side of the trailer frame.

• 35' total cable length for trailers of many sizes
• 42" white ground lead for easier grounding to chassis
• Designed to split at trailer tongue for clean side runs
• Fits vehicles equipped with a 4-way flat trailer plug

What circuits are included and how are they identified?

This 4-wire harness carries the four standard trailer lighting functions with 18 AWG color-coded conductors. The clear color scheme makes installation faster and reduces risk of miswiring when connecting tail lights, stop/turn signals, and ground.

• White — chassis ground (negative)
• Brown — tail/running lights
• Yellow — left/driver side stop and turn
• Green — right/passenger side stop and turn

Is the LIMICAR wiring durable and compliant?

The harness uses 18 AWG bonded conductors in a wishbone layout and is built to meet SAE J1128 low-voltage primary cable expectations. Materials and construction focus on corrosion resistance and flexible routing for trailer environments, though you should still protect exposed connections with dielectric grease or heat-shrink where appropriate.

• 18 AWG bonded, color-coded conductors for reliable signal transfer
• Wishbone-style split for organized installation
• Manufactured to conform with SAE low-voltage cable standards
• Recommended to seal and protect connectors for longevity

Which trailers and situations is this harness best suited for?

Use this LIMICAR 4-way flat harness for most small to medium trailers that require the basic lighting circuits. It is ideal where a long single run and a separate ground lead simplify routing, but it is not compatible with motorcycle-specific wiring systems or trailers needing 5- or 7-pin function sets.

• Great for boat trailers, utility cargo trailers, ATV or equipment trailers
• Works with horse trailers that use a 4-way flat connector
• Not intended for motorcycle trailer wiring or 7-pin systems
• Confirm vehicle plug type and trailer requirements before ordering

Who is this for: The LIMICAR 35FT 4 Wire Trailer Wire suits DIYers, fleet maintainers, and weekend haulers who want a straightforward, long-run 4-pin harness for basic trailer lighting. If you need a durable, color-coded 4-wire solution to route tail and signal wiring down a trailer tongue and along each side, this kit supplies the length, ground reach, and standardized wiring layout to finish the job quickly and correctly.