Trouble Shooting: Notes

SYMPTOM TROUBLE SHOOTING INDEX

Symptom	Perform Test
Radiator fan does not run at all, but condenser fan runs with A/C ON or when the engine coolant temperature is above 199°F (93°C).	See RADIATOR FAN CIRCUIT TROUBLE SHOOTING "A" .
Both radiator fan and condenser fan do not run with A/C ON and when the engine coolant temperature is above 199°F (93°C).	See RADIATOR & CONDENSER FANS CIRCUIT TROUBLE SHOOTING "B" .
Condenser fan runs but radiator fan does not run when the engine coolant temperature is above 199°F (93°C), but both fans run with A/C ON.	Remove the radiator fan control relay, and test. See FAN RELAYS under COMPONENT TESTS. If the relay is faulty, replace it. If the relay is OK, repair a short in the wire between the radiator fan control relay 5-pin connector, terminal No. 4 and the radiator fan motor 2-pin connector, terminal No. 2.
Both radiator fan and condenser fan do not run when the engine coolant temperature is above 199°F (93°C), but both fans run with A/C ON.	See RADIATOR & CONDENSER FANS CIRCUIT TROUBLE SHOOTING "C" .
Both radiator and condenser fans do not run when the engine coolant temperature is above 199°F (93°C), but radiator fan runs with A/C ON.	See RADIATOR & CONDENSER FANS CIRCUIT TROUBLE SHOOTING "D" .
Both radiator fan and condenser fan run with ignition switch ON, with A/C OFF, and when the engine coolant temperature is below 199°F (93°C).	See RADIATOR & CONDENSER FANS CIRCUIT TROUBLE SHOOTING "E" .
Both radiator fan and condenser fan do not run at high speed with the A/C ON.	See SYMPTOM TESTS in appropriate AUTOMATIC A/C-HEATER SYSTEMS article.
Both radiator fan speed and condenser fan speed do not change from Low to Hi when the engine coolant temperature 210°F (99°C), but both fan's seed change with A/C ON.	See RADIATOR & CONDENSER FANS CIRCUIT TROUBLE SHOOTING "F" .
Condenser fan speed does not change from Low to Hi with A/C ON and the engine coolant temperature above 210°F (99°C).	See SYMPTOM TESTS in appropriate AUTOMATIC A/C-HEATER SYSTEMS article.