{"product_id":"walsio-32ft-trailer-wiring-harness-4-pin-5-wire-y-split-18-awg-copper-weatherproof","title":"WALSIO 32ft Trailer Wiring Harness 4-Pin 5-Wire Y-Split — 18 AWG Copper, Weatherproof","description":"\u003cp\u003e\u003cstrong\u003eWALSIO's 32-foot 4-pin, 5-wire trailer wiring harness is a weatherproof, Y-shaped wiring kit built to replace or upgrade trailer lighting connections without splices or extensions.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis complete harness supplies color-coded conductors, durable corrosion-resistant materials, and a long reach to simplify trailer electrical work. Crafted from 18 AWG pure copper, thick PVC insulation and an outer braided nylon sleeve, the kit is made to withstand road vibration, moisture and daily wear. It includes a male 4-way flat plug, a 2.5-foot ground lead, and an instruction manual so you can rewire typical trailers, boat or ATV carriers, and livestock or utility trailers quickly.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this harness simplify trailer lighting replacement?\u003c\/h3\u003e\n\u003cp\u003eThe WALSIO harness reduces rewiring time by providing five pre-run wires and a Y-split layout so you rarely need to run extra conductors across the axle. Color-coded leads match standard 4-way flat wiring, making it straightforward to attach to existing sockets or lamps. The included male plug lets you swap a failing connector without rebuilding the entire trailer harness.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePre-cut 32 ft length covers most trailer spans without extensions\u003c\/li\u003e\n  \u003cli\u003eColor-coded wires follow industry-standard wiring conventions\u003c\/li\u003e\n  \u003cli\u003eY-shaped split avoids long axle-crossing wire runs\u003c\/li\u003e\n  \u003cli\u003eMale 4-way flat plug for direct connector replacement\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs this harness durable enough for marine or heavy-use conditions?\u003c\/h3\u003e\n\u003cp\u003eYes — the wiring uses 18 AWG pure copper cores for reliable conductivity, enclosed in thick PVC insulation for electrical protection. A braided nylon outer sleeve adds abrasion resistance, and connector caps guard against dust and water intrusion. These elements combine to extend service life in wet or rough environments.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e18 AWG copper conductors for consistent signal transfer\u003c\/li\u003e\n  \u003cli\u003eThick PVC jacket reduces short and abrasion risk\u003c\/li\u003e\n  \u003cli\u003eBlack braided nylon sleeve for extra mechanical protection\u003c\/li\u003e\n  \u003cli\u003eProtective plug cover to help prevent corrosion and contaminants\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat installation steps should I expect and what tools are needed?\u003c\/h3\u003e\n\u003cp\u003eInstallation is typically straightforward: identify color-matched wires, attach to trailer lights and ground, secure routing, and plug into the tow vehicle. Basic tools like wire strippers, crimp connectors or butt splices, electrical tape, and zip-ties are all you'll need for most jobs. The kit's instruction manual helps clarify the wiring layout if this is your first wiring project.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eStrip, crimp or solder connections per the manual\u003c\/li\u003e\n  \u003cli\u003eUse zip-ties or clamps to secure harness along the frame\u003c\/li\u003e\n  \u003cli\u003eAttach 2.5 ft ground lead to a clean metal point\u003c\/li\u003e\n  \u003cli\u003eTest lights with a vehicle connector tester before towing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this harness work with my trailer’s existing 4-way flat socket?\u003c\/h3\u003e\n\u003cp\u003eThe 4-pin 5-wire harness is designed to match standard 4-way flat trailer systems and will replace most factory or aftermarket male connectors. The extra fifth wire provides additional flexibility for separate ground or auxiliary circuits if needed. Check that your trailer uses a 4-way flat system; if you have a 7-way or round connector, an adapter or different harness may be required.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDirectly compatible with industry-standard 4-way flat sockets\u003c\/li\u003e\n  \u003cli\u003eExtra wire available for dedicated ground or auxiliary use\u003c\/li\u003e\n  \u003cli\u003eIncludes male plug for quick replacement of a worn connector\u003c\/li\u003e\n  \u003cli\u003eMay need an adapter for non-4-way systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The WALSIO 32ft 4-pin 5-wire trailer wiring harness suits DIYers, fleet mechanics, boat owners, and anyone rewiring or upgrading trailers that use 4-way flat connectors. It’s especially helpful when you want a tidy installation without cross-axle splices, stronger weather protection than stock harnesses, and a plug-ready replacement for worn connectors.\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: Does this harness fit all 4-way flat trailer sockets?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, it matches standard 4-way flat connectors; use an adapter for other connector types.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use this harness on a boat trailer?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, materials and protective cap make it suitable for marine trailers when properly secured.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"WALSIO","offers":[{"title":"Default Title","offer_id":48086226403486,"sku":"B0DQPX186C","price":48.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/walsio-front-plug-overview.jpg?v=1785890628","url":"https:\/\/northtrailauto.ca\/products\/walsio-32ft-trailer-wiring-harness-4-pin-5-wire-y-split-18-awg-copper-weatherproof","provider":"North Trail Auto","version":"1.0","type":"link"}