Application: It is suitable for cars, trucks, ships, RVs, box trucks, excavators, harvesters, etc. with a 12V power supply. How to Install: Ensure the flow direction through the cooling system. Connect the hot coolant hose to the inlet and outlet of the heater. Connect the heater and switch it to the vehicle's electrical system. Connect the red wire of the switch to the positive pole of the power supply and heater. Connect the blue wire of the switch to the negative terminal of the heater. Connect the black wire to the negative pole of the power supply. Package Included : 1*12V Universal Auto Car Heater 4*Hoses 4*Connectors 2*Installation Brackets 1*Stepless Adjustment Knob All Accessories for Assembly.
