Fan Controls Symptom Troubleshooting

Before performing any troubleshooting procedures check:
  • Fuses
  • Grounds
  • Cleanliness and tightness of all connectors

SYMPTOM PROCEDURE 
Radiator fan does not run at all Radiator Fan Circuit Troubleshooting. 
Radiator fan does not run for engine cooling, but it runs with A/C on Radiator Fan Switch Circuit Troubleshooting (Open). 
Radiator fan runs with ignition switch ON (II), A/C off, and engine temperature below 93°C (199°F) Radiator Fan Switch Circuit Troubleshooting (Short).