Two Speed Fan Operation
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Although the PCM output circuits are called LFC and HFC, cooling fan operation is controlled by a combination of these outputs.
Refer to ENGINE CONTROL COMPONENTS .
NOTE:
The HFC circuit may be wired to the FC and HFC relays. Refer to the
Wiring Diagrams article for additional information.
Fan Control (FC) Relay Connector
NOTE:
The HFC circuit may be wired to the FC and HFC relays. Refer to the
Wiring Diagrams article for additional information.