40 AMP Waterproof Electric Fan Relay Kit with Thermostat - 185°F On/175°F Off Temperature Sensor Switch - Universal Radiator Cooling Fan Wiring Harness for Cars, Trucks & SUVs - Perfect for Engine Overheating Protection & Improved Cooling Performance

Package Include： 1x Wiring Diagram 1x 40A Relay with Wiring Harness 1x Thermostat Switch 185'F On - 175'F Off 1x 3/8" to 1/2" Adapter 1x Inline Fuse Holder 1x 20 Amp Fuse 4 Ring Terminals 2 Wire Connectors Specifications: Voltage: 12VDC Temperature: Approximately 185'F On - 175'F Off Thread Size: the temperature sensor has a 3/8'' pipe thread, and a 1/2'' adapter included If you want to turn on the fans when A/C activates, you would need an additional relay kit and follow the steps below: 1.Connect the RED wire from the A/C relay to the grey wire (sending unit) of the original fan relay harness 2.Connect the GREY and COFFEE wires from the A/C relay to the ground 3.Connect the BLACK wire from the A/C relay to the +12 volt of the A/C compressor clutch wire For reference: 12 Gauge - 20 Amps; 10 Gauge - 30 Amps; 8 Gauge - 40 Amps Please note: 1.The thermostat MUST be grounded through the threads to the engine in order for it to work, and the engine MUST be grounded. 2.If you intend to mount high-profile cooling fans, you could crimp or solder bigger wires to it. The 14AWG wires (15 amps) are not bigger enough for high amps draw.

Installation For dual fan wiring, you would need two of this relay kit. Easy to follow wiring diagram simplify wiring your electric fans. RED to 12VDC positive battery terminal, COFFEE to Fan Positive, BLACK to Ignition, GREY to Sending Unit per wiring diagram. Direct replacement part fits 10, 12, 14, and 16 inch cooling fans.

Package Include This electric cooling fan thermostat kit contains everything you need, including 40A relay, wiring harness, thermostat switch, 3/8" to 1/2" adapter, in-line fuse holder, 20 amp fuses, 4 ring terminals and 2-wire connector. Temperature switch turns on fan approximately at 185 Degrees and Off at 175 Degrees.

NOTE The thermostat MUST be grounded through the threads to the engine in order for it to work, and the engine MUST be grounded. The thermostat supplied with this kit is OE style to mount in the cylinder head of the engine or any water jacket if needed.

NOTE You can crimp or solder larger wires if you plan to install a high-spec fan. 14 AWG (15 amp) wire not large enough for high current consumption.

Ensure If there is any problem with the product, please do not hesitate to contact us, we will help you solve the problem.