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Home >> Chevrolet >> 2000 >> Metro Base, 2D Hatchback >> Repair and Diagnosis >> Engine Mechanical >> Cooling Fan >> Engine Cooling Fan System - Troubleshooting >> Electric Cooling Fan Circuit Diagnosis >> 2.4L, 3.1L & 3.4L ALERO, Grand Am & MALIBU >> Cooling Fan Always On

Cooling Fan Always On

  1. If diagnostic system check has not been performed, see DIAGNOSTIC SYSTEM CHECK . If diagnostic system check has been performed, go to next step.
  2. Turn ignition on, engine off. If one or both cooling fans are running all the time, go to next step. If one or both cooling fans are not running, problem is intermittent.
  3. If both cooling fans are running continuously, go to step  5. If both cooling fans are not running continuously, go to next step.
  4. Remove cooling fan series/parallel relay. If right cooling fan turned off, go to step  6. If right cooling fan did not turn off, go to step  7.
  5. Repair short in left cooling fan supply voltage circuit (Light Blue wire). After repairs, go to step  8.
  6. Repair short in left cooling fan low circuit (White wire). After repairs, go to step  8.
  7. Repair short in right cooling fan supply voltage circuit (Black wire for 2000 Alero and Grand Am, Gray wire for all others). After repairs, go to next step.
  8. Operate system to verify repair.
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