{"product_id":"oyviny-4-way-flat-trailer-wiring-harness-10-5-ft-coiled-extension-pu-jacketed-pure-copper","title":"Oyviny 4-Way Flat Trailer Wiring Harness — 10.5 ft Coiled Extension, PU-Jacketed Pure Copper","description":"\u003cp\u003e\u003cstrong\u003eThe Oyviny 4-way flat trailer wiring harness is a stretchable 10.5-foot coiled extension with color-coded pure copper conductors protected by a durable PU jacket for reliable taillight and signal connections.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis compact, coiled trailer cable is engineered to replace worn or broken 4-way flat plugs and to extend trailer wiring without loose cables dragging on the road. The 10.5-foot design stretches and contracts to give extra reach while the polyurethane (PU) jacket improves abrasion and weather resistance compared with standard PVC sleeving. Color coding and a standard male flat plug make splicing and installation straightforward for common boat, ATV, motorcycle, and utility trailers.\u003c\/p\u003e\n\n\u003ch3\u003eHow long is the cable and how does the coiled design help?\u003c\/h3\u003e\n\u003cp\u003eThe harness measures 10.5 feet fully extended (126 inches) with a typical working length around 9.5 feet when under mild tension. The coiled shape keeps excess cable compact when not stretched, preventing dragging and tangling during turns or when backing up. This also reduces wear on the wires and improves safety by keeping the cable off the ground.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eNominal full length: 10.5 ft (126 in)\u003c\/li\u003e\n  \u003cli\u003eTypical working length: ~9.5 ft (114 in)\u003c\/li\u003e\n  \u003cli\u003eCoiled form minimizes slack and abrasion\u003c\/li\u003e\n  \u003cli\u003eStretchability provides flexible towing distance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan I install this harness on my existing 4-way flat connector?\u003c\/h3\u003e\n\u003cp\u003eYes — the Oyviny extension uses the standard 4-way flat male plug compatible with most vehicle 4-way flat sockets. Color-coded internal wires let you splice into existing trailer wiring quickly to restore taillights, turn signals, and brake lights. The plug is sized for common trailer applications, so replacement or extension is a simple retrofit.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eStandard 4-way flat male plug fits industry sockets\u003c\/li\u003e\n  \u003cli\u003eColor-coded wires for easy identification and splicing\u003c\/li\u003e\n  \u003cli\u003eCompatible with most boat and utility trailers\u003c\/li\u003e\n  \u003cli\u003eWorks for taillights, brake lights, and turn signals\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and construction protect the wiring?\u003c\/h3\u003e\n\u003cp\u003eThe cable uses pure copper conductors for efficient current flow and reliable signal transfer. A polyurethane (PU) outer jacket covers the wires, offering improved temperature tolerance and abrasion resistance compared with traditional PVC. These choices extend service life in harsh outdoor conditions and reduce the chance of wire exposure or breakage.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePure copper cores for stable electrical conductivity\u003c\/li\u003e\n  \u003cli\u003ePU jacket resists wear, sunlight, and temperature changes\u003c\/li\u003e\n  \u003cli\u003eWeather-resistant construction for outdoor use\u003c\/li\u003e\n  \u003cli\u003eColor-coded insulation maintains clear wiring identification\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat trailers and situations is this harness best suited for?\u003c\/h3\u003e\n\u003cp\u003eThis 4-pin coiled extension is ideal for small to medium trailers where a standard 4-way flat connection is used. It’s particularly handy for boat trailers, ATV haulers, motorcycle trailers, and utility trailers that need a bit more reach without permanent cable slack. The compact coil also helps when trailers are frequently coupled and uncoupled or when storage space is limited.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBoat, ATV, motorcycle, and light utility trailers\u003c\/li\u003e\n  \u003cli\u003eReplacement of worn or damaged 4-way plugs\u003c\/li\u003e\n  \u003cli\u003eSituations needing flexible, non-dragging wiring\u003c\/li\u003e\n  \u003cli\u003eFrequent connect\/disconnect trailer use\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Oyviny 4-way flat coiled trailer wiring harness is designed for DIYers, boat owners, tow operators, and small-fleet managers who need a reliable, stretchable 4-pin extension. If you want a compact cable that stretches when necessary, resists weather and abrasion, and plugs into standard 4-way sockets for easy splicing and replacement, this harness delivers a practical and durable solution without complex installation.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is this harness compatible with my vehicle's 4-way flat socket?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The Oyviny harness uses the standard 4-way flat male plug compatible with most vehicle 4-way flat sockets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will the coiled design prevent the cable from dragging?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The coiled shape keeps excess cable compact and off the ground, reducing drag and wear while towing.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Oyviny","offers":[{"title":"Default Title","offer_id":67588823023801,"sku":"B0CKZCZ3J5","price":75.38,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/oyviny-front-view-4-way-coiled-harness.jpg?v=1790525880","url":"https:\/\/redleafauto.ca\/products\/oyviny-4-way-flat-trailer-wiring-harness-10-5-ft-coiled-extension-pu-jacketed-pure-copper","provider":"Redleaf Auto","version":"1.0","type":"link"}