{"product_id":"electric-cooling-fan-relay-wiring-harness-kit","title":"12V 40A Electric Cooling Fan Relay Wiring Harness Kit with Thermostat Switch 185 On 175 Off","description":"\u003cp\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0615\/3227\/4881\/files\/JD1912-FAN1_12V_40A_Electric_Fan_Relay_Kit.jpg?v=1750666924\" alt=\"\"\u003eAbout this item\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"ng-star-inserted\"\u003e\u003cstrong class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e【Automated Thermal Regulation】\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e- \u003c\/span\u003eThis \u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eelectric fan relay kit\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e provides automated control for your vehicle's cooling fan, ensuring optimal engine temperatures. The \u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eincluded 3\/8\" NPT temperature switch\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e is precisely calibrated to activate the fan at approximately 185°F and deactivate it at 175°F. This \u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003ethermostatic fan control system\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e delivers precision cooling when your engine needs it most.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ng-star-inserted\"\u003e\u003cstrong class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e【Comprehensive Wiring Solution】\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e- \u003c\/span\u003eThe \u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003efan wiring kit\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e includes a heavy-duty 12V 40A waterproof relay (JD1912) and a pre-wired harness with a generous 35-inch line length for flexible installation. A \u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e20A blade fuse\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e provides essential circuit protection, and a full set of terminals (RV5.5-10, RV5.5-6, RV1.25-5, BV3.5, FDFD2-250) are supplied for secure connections. This \u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003ecomplete fan relay assembly\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e ensures you have all necessary components for a professional setup.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ng-star-inserted\"\u003e\u003cstrong class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e【Robust Electrical Design】\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e- \u003c\/span\u003eThis \u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eautomotive relay harness\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e utilizes robust 14AWG wires for the main power circuits (PIN30 Red, PIN87 Brown) to effectively handle high-current demands from electric fans. The \u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003econtrol circuit wires\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e (PIN85 Black, PIN86 White) are 18AWG, ensuring reliable signal transmission for relay activation. Such \u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eheavy-duty wiring specifications\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e contribute to the kit's durability and safe operation under load.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ng-star-inserted\"\u003e\u003cstrong class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e【Simplified System Integration】\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e- \u003c\/span\u003eA \u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eclear wiring diagram\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e is provided, illustrating connections for the battery, fan, ignition, temperature sending unit, and an optional fan override switch. The \u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003epre-assembled relay socket and color-coded harness\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e significantly simplify the installation process, reducing setup time and potential errors. This \u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003euser-friendly relay kit\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e is designed for straightforward integration into most 12V DC automotive cooling systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ng-star-inserted\"\u003e\u003cstrong class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e【Broad Cooling Fan Compatibility】\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e- \u003c\/span\u003eThis \u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eelectric cooling fan relay kit\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e is engineered for compatibility with a wide range of common 10-inch, 12-inch, 14-inch, and 16-inch electric cooling fans. The \u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003euniversal fan controller\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e is suitable for various automotive applications, from classic cars to modern vehicles requiring enhanced cooling performance. Its \u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eversatile design\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e makes this an ideal solution for upgrading or repairing vehicle cooling systems.\u003c\/span\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpec\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable style=\"width: 548px; height: 254.8px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"height: 19.6px; width: 190.225px;\" width=\"434\" height=\"19\"\u003ePart NO\u003c\/td\u003e\n\u003ctd style=\"width: 344.175px; height: 19.6px;\" width=\"434\"\u003eJD1912-FAN1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd class=\"ng-star-inserted\" style=\"width: 190.225px;\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eOperating Voltage\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\" style=\"width: 344.175px;\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e12V DC (Ensure input voltage is ≤12V)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd class=\"ng-star-inserted\" style=\"width: 190.225px;\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eRelay Type\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\" style=\"width: 344.175px;\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eJD1912 Waterproof Automotive Relay\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd class=\"ng-star-inserted\" style=\"width: 190.225px;\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eRelay Rating\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\" style=\"width: 344.175px;\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e12V 40A\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd class=\"ng-star-inserted\" style=\"width: 190.225px;\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eFuse Specification\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\" style=\"width: 344.175px;\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e20A Blade Fuse (Included)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd class=\"ng-star-inserted\" style=\"width: 190.225px;\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eTemperature Switch\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\" style=\"width: 344.175px;\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e3\/8\" NPT Thread\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd class=\"ng-star-inserted\" style=\"width: 190.225px;\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eActivation Temperature\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\" style=\"width: 344.175px;\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eApproximately 185°F (Fan ON)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd class=\"ng-star-inserted\" style=\"width: 190.225px;\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eDeactivation Temperature\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\" style=\"width: 344.175px;\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eApproximately 175°F (Fan OFF)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd class=\"ng-star-inserted\" style=\"width: 190.225px;\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eWiring Harness Length\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\" style=\"width: 344.175px;\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eApproximately 35 inches\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd class=\"ng-star-inserted\" style=\"width: 190.225px;\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eWire Gauges:\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\" style=\"width: 344.175px;\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd class=\"ng-star-inserted\" style=\"width: 190.225px;\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e- PIN 30 (Red Wire)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\" style=\"width: 344.175px;\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e14AWG (To +12V DC via Fuse)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd class=\"ng-star-inserted\" style=\"width: 190.225px;\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e- PIN 87 (Brown Wire)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\" style=\"width: 344.175px;\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e14AWG (To Fan Positive)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd class=\"ng-star-inserted\" style=\"width: 190.225px;\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e- PIN 85 (Black Wire)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\" style=\"width: 344.175px;\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e18AWG (To Temperature Sending Unit \/ Optional Override Switch Ground)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"ng-star-inserted\" style=\"width: 190.225px;\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e- PIN 86 (White Wire)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\" style=\"width: 344.175px;\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e18AWG (To Ignition Switch \/ Switched +12V Source)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"ng-star-inserted\" style=\"width: 190.225px;\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eCompatible Fan Sizes\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\" style=\"width: 344.175px;\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eDesigned for 10\", 12\", 14\", and 16\" electric cooling fans\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0615\/3227\/4881\/files\/JD1912-FAN1_12V_40A_Electric_Cooling_Fan_Relay_Kit_Accessories.jpg?v=1750666924\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0615\/3227\/4881\/files\/JD1912-FAN1_12V_40A_Electric_Cooling_Fan_Relay_Kit_Features.jpg?v=1750666924\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0615\/3227\/4881\/files\/JD1912-FAN1_12V_40A_Electric_Cooling_Fan_Relay_Kit_Specification.jpg?v=1750666924\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0615\/3227\/4881\/files\/JD1912-FAN1_12V_40A_Electric_Cooling_Fan_Relay_Kit_Wire_Specification.jpg?v=1750666924\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cdiv style=\"position: absolute; left: 210px; top: 333.719px;\" id=\"gtx-trans\"\u003e\n\u003cdiv class=\"gtx-trans-icon\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"DAIER","offers":[{"title":"Default Title","offer_id":49358341406913,"sku":"JD1912-FAN1","price":19.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0615\/3227\/4881\/files\/JD1912-FAN1_12V_40A_Electric_Cooling_Fan_Relay_Wiring_Harness_Kit.jpg?v=1750666596","url":"https:\/\/www.daierswitches.com\/is-eu\/products\/electric-cooling-fan-relay-wiring-harness-kit","provider":"DAIER","version":"1.0","type":"link"}