Features Complete Fan Kit: 3/8" electric cooling fan wire harness kit simplifies installation with a waterproof relay, temperature sensor, and all necessary wiring, ensuring a complete and straightforward setup for optimal cooling performance. Versatile Compatibility: Engineered to accommodate various fan sizes, this kit is perfect for 10in to 16in fans, making it a universal solution for those needing to install or upgrade their vehicle's cooling system with a new electric fan. Straightforward Installation: With clearly marked connections, including a 12VDC power cable and fan connections, this harness kit offers a user-friendly installation process, ideal for both novice and experienced mechanics. Reliable Operation: Featuring a waterproof 12VDC 40A relay and a precise temperature switch sensor that activates at 185℉ and off at 175℉, the kit ensures consistent and safe functioning, keeping your engine at the optimal temperature. Standard Fit: With a standard 3/8‑18 NPT thread on the temperature sensor, this electric fan relay switch kit is designed to fit seamlessly into most cooling fan systems, making it a widely applicable choice for various vehicles. Features: 1. FAN WIRING KIT: This kit includes waterproof relay, short circuit protector, water temperature sensor, wiring terminals and screws, simple and practical. 2. APPLICABLE SIZE: This wiring harness kit is suitable for 10in, 12in, 14in, and 16in fans, for dual fan wiring, you will need two of these relay kits. 3. EASY CONNECTION: Red is connected to the 12VDC positive pole, brown for fan positive pole, black for ignition, and gray is connected to the sending unit. 4. GOOD PERFORMANCE: The voltage and current is 12VDC 40A, 185℉ on and 175℉ off, which has stable performance, safe and reliable operation. 5. STANDARD THREAD: The thread size of the sending unit is 3/8‑18 NPT, and this electric fan relay switch kit is suitable for most cooling fan systems. Specification: Item Type: Electric Fan Wiring Kit Voltage: DC12V Current: 40A Package List: 4 x Screws 1 x Relay 1 x Short Circuit Protector 1 x Water Temperature Sensor 7 x Terminals Package List 4 x Screws 1 x Relay 1 x Short Circuit Protector 1 x Water Temperature Sensor 7 x Terminals