{"product_id":"mecmo-4-pin-trailer-wiring-harness-for-subaru-2009-2024-vehicle-side-4-way-flat-plug-and-play","title":"MECMO 4-Pin Trailer Wiring Harness for Subaru 2009–2024 — Vehicle-Side 4-Way Flat, Plug-and-Play","description":"\u003cp\u003e\u003cstrong\u003eThe MECMO 4-pin trailer wiring harness 56040 is a vehicle-side, plug-and-play 4-way flat connector built to add trailer tail, turn and brake light capability to compatible 2009–2024 Subaru models without cutting factory wiring.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf you tow a small trailer, cargo carrier or bike rack with a compatible Subaru Forester, Outback, Crosstrek, XV or Ascent that already has the factory tow package, this harness provides the factory-style electrical connection for trailer lights. It installs at the rear tail light junction using OEM-style connectors, includes a rubber dust cover for weather protection and uses heavy-duty wire with tin-plated copper terminals for corrosion resistance.\u003c\/p\u003e\n\n\u003ch3\u003eWhich Subaru models and years is this harness compatible with?\u003c\/h3\u003e\n\u003cp\u003eThis MECMO 4-pin harness is made for select Subarus equipped with the factory (OEM) tow package. It fits many model years but excludes specific hybrid or older sport variants listed by Subaru.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with 2009–2024 Subaru Forester\u003c\/li\u003e\n  \u003cli\u003e2013–2024 Subaru Outback Wagon (excluding Hybrid)\u003c\/li\u003e\n  \u003cli\u003e2019–2024 Subaru Ascent\u003c\/li\u003e\n  \u003cli\u003e2016–2024 Subaru Crosstrek (excluding 10–12 Outback Sport)\u003c\/li\u003e\n  \u003cli\u003e2013–2015 Subaru XV Crosstrek (non-Hybrid)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow difficult is installation and will I need to cut vehicle wiring?\u003c\/h3\u003e\n\u003cp\u003eInstallation is designed to be straightforward: the harness is a T-style plug-and-play unit that mates with the vehicle's existing trailer wiring at the rear tail light harness. No cutting, splicing, or special tools are required for supported models, keeping the factory wiring intact.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDirect-fit vehicle-side 4-pin connector matches OEM sockets\u003c\/li\u003e\n  \u003cli\u003ePlugs into factory tow-package harness located in the tail light area\u003c\/li\u003e\n  \u003cli\u003eRemoves cleanly if you later upgrade or replace the connector\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat electrical and physical protections does the MECMO harness provide?\u003c\/h3\u003e\n\u003cp\u003eThe harness is built to resist corrosion and environmental exposure so your trailer lights stay reliable. It uses bonded wiring and tin-plated copper terminals plus a snug rubber dust cover to keep moisture and dirt out of the connector.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHeavy-duty bonded wire for mechanical strength\u003c\/li\u003e\n  \u003cli\u003eTin-plated copper terminals for better conductivity and corrosion resistance\u003c\/li\u003e\n  \u003cli\u003eRubber dust cover seals the vehicle-side socket from water and debris\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat lights and signals will this 4-pin connector operate on my trailer?\u003c\/h3\u003e\n\u003cp\u003eThe standard 4-way flat wiring carries the basic lighting circuits required for most small trailers: tail\/running lights, left and right turn signals, plus brake lights. It does not carry 12V power or electric brake control circuits—those require separate adapters or a 7-pin arrangement.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePowers trailer tail\/running lights\u003c\/li\u003e\n  \u003cli\u003eSupplies left\/right turn signals and brake lights\u003c\/li\u003e\n  \u003cli\u003eDoes not include dedicated 12V accessory power or trailer brake control\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: Choose the MECMO 56040 harness if you own one of the listed Subaru models with the factory tow package and want an OEM-style, no-splice solution for connecting a small trailer’s lighting. It’s aimed at DIYers and installers who value a clean installation, corrosion-resistant terminals, and a weather-tight vehicle-side socket. If your vehicle lacks the OEM tow package or you need auxiliary power or electric-brake control, consider a different wiring kit or a 7-pin upgrade.\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: Do I need to modify my car’s wiring to install this harness?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No—this is a plug-and-play vehicle-side harness that connects to the OEM tow-package wiring without cutting or splicing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this harness provide power for electric trailer brakes?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No—the 4-pin flat only carries lighting circuits; electric brakes require a 7-pin connector or separate brake controller wiring.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"MECMO","offers":[{"title":"Default Title","offer_id":48083294650526,"sku":"B0CQRNZ4ZD","price":52.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/mecmo-4-pin-harness-front-connector.jpg?v=1785830791","url":"https:\/\/northtrailauto.ca\/products\/mecmo-4-pin-trailer-wiring-harness-for-subaru-2009-2024-vehicle-side-4-way-flat-plug-and-play","provider":"North Trail Auto","version":"1.0","type":"link"}