Learn how to diagnose overheating problems with this Subaru radiator fan wiring diagram Most Subaru boxer engines have two radiator fans; one main fan and one sub fan for the AC. The ECM uses temperature data from the engine coolant temperature sensor to turn on the main fan and turns on the sub fan when the driver operates the AC. Follow how the radiator fans work using the Subaru radiator fan wiring diagram below. Subaru radiator fan components 2 fuses to power the three relay control coils 2 25A fuses … Read More

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