Bitiontry 4-Pin 5-Wire Trailer Wiring Harness 26FT — Y-Split Wishbone, Pure Copper & Nylon Sleeve

Bitiontry's 26FT 4-pin 5-wire trailer wiring harness is a wishbone-style replacement kit that lets you rewire both-side taillights, turn signals and brake lights quickly without splicing extra wires.

This upgraded trailer wiring harness bundles two brown tail-light leads into a Y-shaped wishbone connector and supplies 26 feet of 18 AWG pure copper conductors wrapped in thick PVC and a black nylon net sleeve. Built to fit standard 4-way flat sockets, the kit aims to simplify trailer repairs and new installs by matching common trailer wiring color codes and delivering corrosion-resistant protection for long service life.

How does this harness simplify a trailer rewiring project?

The Y-harness design separates the single tail-light feed into two dedicated brown leads so both left and right taillights receive power simultaneously—no additional splices required. Color-coded wires match industry conventions to make connections straightforward, cutting install time.

• Wishbone connector splits tail-light feed evenly to both sides
• Color-coded leads (including brown for taillights) for easy matching
• 26 feet of cable to reach across most trailer frames without extensions
• Standard 4-way flat male plug fits common trailer sockets

What materials and protection keep this harness reliable outdoors?

The wiring uses pure copper conductors for consistent conductivity and thicker PVC insulation to resist abrasion and mild chemical exposure. A black nylon net tube surrounds the bundle to reduce abrasion, chafing, and UV exposure at mounting points.

• Pure copper cores for stable electrical flow
• Thick PVC jacket for weather and abrasion resistance
• Nylon net sleeve for extra mechanical protection and neat routing
• 18 AWG gauge suitable for typical trailer lighting circuits

Will this harness fit my trailer and 4-way flat socket?

The kit is built to match industry-standard 4-way flat connectors and provides a male plug that mates with most vehicle or trailer sockets. Its universal color coding and long lead lengths make it suitable for a wide range of small to medium trailers.

• Standard 4-way flat male plug for direct compatibility
• Color-coded wires for brake, turn, tail, and ground identification
• 26-foot length sufficient for common trailer layouts and routing
• Designed as a direct replacement or repair harness for most trailers

How do I install and maintain the harness for best performance?

Strip wire ends, match colors to your trailer's circuit, and splice or crimp connectors using heat-shrink or dielectric grease where appropriate. Secure the harness to the frame with clamps or zip ties to avoid rubbing and inspect connections periodically for corrosion.

• Use proper splices or sealed butt connectors for secure joints
• Apply dielectric grease to exposed contacts to minimize corrosion
• Fasten cable along frame to prevent chafing and repeated flex
• Check ground connection for a clean metal contact to the trailer chassis

Who is this for: The Bitiontry 26FT 4-pin 5-wire harness is aimed at DIY trailer owners, small-fleet operators, and repair shops needing a reliable, easy-to-install replacement for damaged trailer lighting circuits. It suits users who want a corrosion-resistant, long-length wiring solution that fits standard 4-way flat systems and eliminates extra splicing by providing a pre-made wishbone tail-light split.