Diagram Wiring A Auto Fan Relay. As you can see from the diagrams above and below its really a simple circuit that not only provides the proper connections to control the cooling fans but unlike the switch under the dash method you wont ever have to worry about forgetting to turn the fans on. This wiring diagram uses three relays.
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There are generally two relay layouts and the wiring diagram assumes the first type below.
The previous owner had taken the wires out of the plastic connector. It shows the components of the circuit as simplified shapes and the capability and signal contacts between the devices. Suggested electric fan wiring diagrams converting a 12 volt switch into a ground switch these diagrams show the use of relays on off sensors on off switches and on off fan controllers. 2003 2007 cadillac cts fuses cooling fan relay wiring diagram.