X AUTOHAUX Electric Fan Relay Kit with Thermostat Sensor Switch, 185 On/175 Off, 40A, for Radiator Electric Cooling Fans, Waterproof Wiring Installati

[Electric Fan Relay Kit Compatible] Fits 254mm, 305mm, 356mm, and 406mm fans, and includes dual fans. For improved performance, we recommend using a separate relay wiring kit for each fan. [Electric Cooling Fan Thermostat Kit Installation] Refer to the wiring diagram for color-coded wiring. Red to +12VDC, Black to fan positive, Black to ignition, Gray to sending unit. [Radiator Fan Controller Function] Turns on the cooling fan when the engine reaches the temperature set by the thermostat switch mounted on the engine head or when the air conditioner is turned on. [Fan Relay Kit Package] 1x wiring diagram, 2x 40A relays with wire bundle, 1x 185'F on-175'F off temperature switch, 1x 9.5mm screw-in probe, 1x 9.5mm to 12.7mm adapter, 2x in-line fuse holders, 2x 20A fuses, 8x ring terminals, 4x fan pigtail connectors. If in doubt, please check the related operation video. [Radiator Fan Mounting Kit Precautions] Crimp or solder thick wire. If installing a high-profile fan, 14AWG wire (15 amps) is not large enough to draw high amperage.