Automotive electric fan 5-pin 30A relay switch harness kit. 14AWG size wire powers 1-2 cooling fans or 12 volt auto accessories. Maximum 30 amp continuous draw with 30A in-line fuse protection. A/C override or manual toggle switch wire built directly into harness. Installation instructions, wiring diagram and components included. Fitting: Standard AN thread size in-line oil cooler hose end adapter fitting. 1/8" inch NPT brass thread-in probe and dual pin disconnect switch. Preset to power fan or 12v accessory at the selected temperature. Fitting is black anodized aluminum for a corrosion resistant design. Measures temp of any liquid including oil, water and coolant fluid.