{"product_id":"tekonsha-118412-4-way-flat-oem-replacement-harness","title":"Tekonsha 118412 4-Way Flat OEM Replacement Harness","description":"\u003cp class=\"nvn-hero\"\u003eTekonsha's 118412 is the fix when your factory trailer harness has had enough. It's a direct 4-way flat replacement for the OEM wiring, so you get clean running lights, brake, and turn signals back to the trailer without splicing into your vehicle's harness.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eThe Tekonsha 118412 is a replacement for the 4-way flat trailer wiring harness that came on your vehicle from the factory. If the original has corroded at the connector, gotten crushed, or just stopped passing a signal to one of the trailer circuits, this is the part that puts you back in business. It's built to drop into the same spot the OEM harness lived in, so you're not re-engineering anything.\u003c\/p\u003e\n\u003cp\u003eA 4-way flat handles the basics, and for a lot of trailers that's all you need. Running lights, left turn and brake, right turn and brake, and a ground. That covers most boat trailers, small utility trailers, and any setup that doesn't run electric brakes or a backup circuit. Plug the trailer's 4-way into this harness and your lights come alive.\u003c\/p\u003e\n\u003cp\u003eWhy replace instead of splice? Because the factory harness is matched to your vehicle's wiring, and a clean replacement keeps you out of the scotch-lock and electrical-tape business. Corroded trailer connectors are one of the most common reasons a rig fails a pre-launch light check, and a fresh harness with sealed terminals is the honest fix, not a patch that fails again next season.\u003c\/p\u003e\n\u003cp\u003eInstallation is about as friendly as trailer wiring gets. You're locating the factory connector, unplugging the tired harness, and clicking the 118412 into place. No cutting into the vehicle's main loom, no guessing at wire colors. If you can reach the connector, you can do this job in your driveway with hand tools and maybe a test light to confirm each circuit before you hit the road.\u003c\/p\u003e\n\u003cp\u003eTekonsha has been building trailer wiring and brake control gear for a long time, and the 118412 carries that same no-drama reputation. It's the part you want if you'd rather solve the problem once. One thing worth saying plainly: this is a 4-way flat replacement, so if your trailer needs electric brakes, a 7-way, or a charge line, you'll want a different harness. Not sure which fits your vehicle? Send us your year, make, and model and we'll point you at the right one.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003eDirect replacement for the factory 4-way flat trailer harness, no splicing into the vehicle loom\u003c\/li\u003e\n  \u003cli\u003eCarries all four standard circuits: running lights, left turn\/brake, right turn\/brake, and ground\u003c\/li\u003e\n  \u003cli\u003ePlugs into the same OEM connector location for a clean, reversible install\u003c\/li\u003e\n  \u003cli\u003eSealed terminals stand up to road spray, salt, and boat-ramp dunkings better than a taped splice\u003c\/li\u003e\n  \u003cli\u003eSized for trailers without electric brakes, including boat trailers and small utility trailers\u003c\/li\u003e\n  \u003cli\u003eBuilt by Tekonsha, a longtime name in trailer wiring and brake controls\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv class=\"nvn-trust\"\u003e\n  \u003ch2\u003eWhy Buy from NVN Marine\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eAuthorized Tekonsha reseller, full manufacturer warranty\u003c\/li\u003e\n    \u003cli\u003eNMEA member and ABYC certified, advice from real boat techs\u003c\/li\u003e\n    \u003cli\u003eSame-day shipping before 3 PM ET on in-stock items\u003c\/li\u003e\n    \u003cli\u003eNY headquarters and Fort Lauderdale flagship retail store\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"nvn-faq\"\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat does this harness replace?\u003c\/summary\u003e\n    \u003cp\u003eIt replaces the 4-way flat trailer wiring harness your vehicle came with from the factory. If that original has corroded, been damaged, or stopped feeding one of the trailer circuits, the 118412 drops in where it lived.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDo I have to cut any wires?\u003c\/summary\u003e\n    \u003cp\u003eNo. It plugs into the same factory connector the old harness used. You're unplugging the worn one and clicking this in, with no splicing into your vehicle's main wiring.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat circuits does a 4-way flat carry?\u003c\/summary\u003e\n    \u003cp\u003eFour of them. Running lights, left turn and brake, right turn and brake, and a ground. That's everything a trailer without electric brakes needs.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWill this work if my trailer has electric brakes?\u003c\/summary\u003e\n    \u003cp\u003eNo. A 4-way flat doesn't carry a brake-control circuit or a charge line. If you run electric brakes you'll want a 7-way setup instead. Ask us and we'll help you sort it out.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I know it fits my vehicle?\u003c\/summary\u003e\n    \u003cp\u003eFitment depends on your year, make, and model. Send those to us before ordering and we'll confirm the 118412 is the right harness for your rig.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs it hard to install?\u003c\/summary\u003e\n    \u003cp\u003eNot really. If you can reach the factory connector, it's a plug-and-play swap with basic hand tools. A test light helps you confirm each circuit before you tow.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable class=\"nvn-specs\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eTitle\u003c\/th\u003e\n\u003ctd\u003e4-Way Flat Replacement For OEM Wiring Harness\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eTekonsha\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd\u003e118412\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e016118058703\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eConnector Type\u003c\/th\u003e\n\u003ctd\u003e4-Way Flat\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eHarness Type\u003c\/th\u003e\n\u003ctd\u003eOEM Replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003eTrailer Wiring Harness\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCircuits Provided\u003c\/th\u003e\n\u003ctd\u003eRunning lights, left turn\/brake, right turn\/brake, ground\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eElectric Brake Support\u003c\/th\u003e\n\u003ctd\u003eNone (4-way flat carries no brake circuit)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n    \"@context\": \"https:\/\/schema.org\",\n    \"@type\": \"FAQPage\",\n    \"mainEntity\": [\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What does this harness replace?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It replaces the 4-way flat trailer wiring harness your vehicle came with from the factory. If that original has corroded, been damaged, or stopped feeding one of the trailer circuits, the 118412 drops in where it lived.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Do I have to cut any wires?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"No. It plugs into the same factory connector the old harness used. You're unplugging the worn one and clicking this in, with no splicing into your vehicle's main wiring.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What circuits does a 4-way flat carry?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Four of them. Running lights, left turn and brake, right turn and brake, and a ground. That's everything a trailer without electric brakes needs.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Will this work if my trailer has electric brakes?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"No. A 4-way flat doesn't carry a brake-control circuit or a charge line. If you run electric brakes you'll want a 7-way setup instead. Ask us and we'll help you sort it out.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How do I know it fits my vehicle?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Fitment depends on your year, make, and model. Send those to us before ordering and we'll confirm the 118412 is the right harness for your rig.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is it hard to install?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Not really. If you can reach the factory connector, it's a plug-and-play swap with basic hand tools. A test light helps you confirm each circuit before you tow.\"\n            }\n        }\n    ]\n}\n\u003c\/script\u003e\n","brand":"TEKONSHA","offers":[{"title":"Default Title","offer_id":45066059972701,"sku":"2008840","price":68.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/7266\/0317\/files\/ImageServerAPI_b63da314-2b2c-4770-a6bd-7f2d9006ad9a.jpg?v=1789630958","url":"https:\/\/nvnmarine.com\/products\/tekonsha-118412-4-way-flat-oem-replacement-harness","provider":"NVN Marine","version":"1.0","type":"link"}