{"product_id":"zozomotors-dual-electric-fan-relay-kit-40a-with-185-f-temperature-switch-dual-fan-control-plug-and-play-harness","title":"ZOZOMOTORS Dual Electric Fan Relay Kit 40A with 185°F Temperature Switch — Dual-Fan Control, Plug-and-Play Harness","description":"\u003cp\u003e\u003cstrong\u003eZOZOMOTORS Dual Electric Fan Relay Kit is a complete 40-amp relay harness with an OE-style temperature switch that automatically activates two medium\/low-profile cooling fans at about 185°F and turns them off near 175°F.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis plug-and-play relay kit gives you a reliable way to control electric radiator or condenser fans without custom wiring. It bundles a 40A relay, clearly labeled wiring harness, waterproof inline fuse holder, OE-type temperature sender, adapter fittings, and terminal hardware so you can replace a failing relay setup or add a thermostat-driven fan to many vehicle cooling systems. The kit was designed for straightforward installation, compatibility with common fan sizes, and durable connections suitable for engine-bay conditions.\u003c\/p\u003e\n\n\u003ch3\u003eHow will this kit work with my vehicle’s existing cooling fans?\u003c\/h3\u003e\n\u003cp\u003eThe kit is built to drive two medium-profile or low-profile fans from a single 40A relay circuit, using the temperature switch as the trigger. It installs in the engine block or water jacket so it senses coolant temperature like factory senders.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSingle 40A relay configured to power two fans under rated load.\u003c\/li\u003e\n  \u003cli\u003eTemperature switch closes at ~185°F and opens at ~175°F to automate fan control.\u003c\/li\u003e\n  \u003cli\u003eDirect replacement fitment for 10\", 12\", 14\", and 16\" fans as listed.\u003c\/li\u003e\n  \u003cli\u003eIncludes adapter to fit either 3\/8\" or 1\/2\" sensor ports.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat’s included and how is the wiring organized?\u003c\/h3\u003e\n\u003cp\u003eAll connections arrive pre-labeled and color-coded so you can follow the included wiring diagram without guessing. Terminals and an inline waterproof fuse provide protection and tidy power routing in the engine bay.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e40A relay, full wiring harness, and easy-to-read wire labels.\u003c\/li\u003e\n  \u003cli\u003eInline waterproof fuse holder plus fuses; ring terminals and wire connectors included.\u003c\/li\u003e\n  \u003cli\u003eRED = 12V battery positive; COFFEE = fan positive; BLACK = sending unit; GREY = ignition trigger.\u003c\/li\u003e\n  \u003cli\u003eSpade connector supplied for the temp sensor for simple hookup.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre there installation requirements or compatibility notes to know?\u003c\/h3\u003e\n\u003cp\u003eYes. The temperature switch must be grounded through its threads to the engine to function correctly, and the engine’s electrical ground must be solid. Also, thermostat choice affects switch behavior.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSensor must screw into a grounded cylinder head or any grounded water jacket port.\u003c\/li\u003e\n  \u003cli\u003eUse a 160°F thermostat when pairing with this 185°F switch; higher thermostats can prevent proper cycling.\u003c\/li\u003e\n  \u003cli\u003eFor high-profile fans or heavier loads, upgrade wiring for pin 30\/87 to 10 AWG or choose the ZOZOMOTORS heavy-duty kit P\/N 30247.\u003c\/li\u003e\n  \u003cli\u003eFollow the included wiring diagram; improper grounding or wiring can stop the switch from functioning.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable and serviceable is the kit in everyday driving conditions?\u003c\/h3\u003e\n\u003cp\u003eThe harness and fuse holder are designed for the harsh environment of the engine bay; connectors, hardware, and the OE-style temperature switch provide long-term serviceability. The included parts let you reterminate or extend wiring if needed.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWaterproof inline fuse holder protects the circuit in wet or dirty conditions.\u003c\/li\u003e\n  \u003cli\u003eColor-coded wires and labeled leads speed troubleshooting and repairs.\u003c\/li\u003e\n  \u003cli\u003eAccessory ring terminals and wire connectors included for secure, crimped connections.\u003c\/li\u003e\n  \u003cli\u003eOE-style sensor fits factory ports and is readily replaceable if service is required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The ZOZOMOTORS Dual Electric Fan Relay Kit is aimed at DIY mechanics, performance enthusiasts retrofitting electric fans, and anyone replacing a worn fan relay harness on cars, trucks, ATVs, or custom cooling setups. It’s ideal when you need an easy-to-install, temperature-activated solution for two medium or low-profile fans, want labeled wiring and protective fusing out of the box, or prefer an OE-style temperature sender that mounts in the engine water jacket.\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: Will this kit run two high-profile cooling fans?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Not without upgrades. For high-profile fans, use ZOZOMOTORS heavy-duty kit P\/N 30247 or upsize wires on pins 30\/87 to 10 AWG.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What temperature does the switch activate and where does it mount?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The switch closes at about 185°F and opens around 175°F; it mounts in a grounded cylinder head or water jacket port.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"ZOZOMOTORS","offers":[{"title":"Default Title","offer_id":55168541491543,"sku":"B098X63RRS","price":52.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/zozomotors-relay-kit-front-packaging.jpg?v=1790407547","url":"https:\/\/britishgarage.co.uk\/products\/zozomotors-dual-electric-fan-relay-kit-40a-with-185-f-temperature-switch-dual-fan-control-plug-and-play-harness","provider":"British Garage","version":"1.0","type":"link"}