Radiator Fan Relay Wiring Diagram. It shows the components of the circuit as simplified shapes and the capability and signal contacts between the devices. When the fan is on too often or wont come on at all a new relay may be the solution.
Firstwire 85 connects the relay to the thermostatic switch which determines when the fan is operational. Suggested electric fan wiring diagrams page 1 these diagrams show the use of relays onoff sensors onoff switches and onoff fan controllers. When installing an auxiliary fan or simply wiring the factory fan so that the driver can manually turn the fan on and off make sure the fan is turning in the right direction.
Wiring diagram for cooling fan relay.
Firstwire 85 connects the relay to the thermostatic switch which determines when the fan is operational. If the fan is not turning in the right direction air will be blown away from the radiator and will not help to cool the radiator. Control unit for low coolant warning. 185 degree thermal switch controlled relay fan relay harness 1.