ELECTRICAL COOLANT FAN AND CONDENSER FAN CONTROL SYSTEM
F2-137wiring diagramCondenser fan control applies to A/C equipped vehicles only.
CONDENSER FAN CONTROL (A/C EQUIPPED ONLY)
To improve A/C efficieny, the condenser fan is operated at three speeds: low, medium and high. There are three relays (High No.1, No.2 and low) which control the condenser fan operation. These controls operation under the conditions below.
Condenser fan relay operation
Engine coolant temperature below 108°C {226°F}
A/C operationYES
A/C relayON
Condenser fan low relayON
Condenser fan high relay No.1OFF
Condenser fan high relay No.2OFF
Fan control operationLOW
Engine coolant temperature above 108°C {226°F}
A/C operationNO
A/C relayOFF
Condenser fan low relayOFF
Condenser fan high relay No.1ON
Condenser fan high relay No.2ON
Fan control operationMEDIUM
Engine coolant temperature above 108°C {226°F}
A/C operationYES
A/C relayON
Condenser fan low relayON
Condenser fan high relay No.1ON
Condenser fan high relay No.2ON
Fan control operationHIGH
Engine coolant temperature sensor malfunction
A/C operationNO
A/C relayOFF
Condenser fan low relayOFF
Condenser fan high relay No.1ON
Condenser fan high relay No.2ON
Fan control operationMEDIUM
Engine coolant temperature sensor malfunction
A/C operationYES
A/C relayON
Condenser fan low relayON
Condenser fan high relay No.1ON
Condenser fan high relay No.2ON
Fan control operationHIGH