LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2000 >> Metro Base, 2D Hatchback >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Cooling Fan >> Engine Cooling Fan System - Troubleshooting >> Electric Cooling Fan Circuit Diagnosis >> 1.8L PRIZM >> Main Cooling Fan Inoperative

Main Cooling Fan Inoperative

  1. Review DESCRIPTION , and then go to next step.
  2. Run engine until operating temperature is reached and thermostat opens. If cooling fans operate, problem is intermittent. If cooling fans do not operate, go to next step.
  3. Exchange fan 1 relay with known good relay (fan 3 relay, A/C MG relay, or horn relay). If problem was found, repair as necessary. After repairs, go to step  14. If problem was not found, go to next step.
  4. Stop engine. Disconnect main fan motor connector. Connect test light across main fan motor connector. Start engine. If test light illuminates, go to step  12. If test light does not illuminate, go to next step.
  5. Check main fan motor ground circuit (White/Black wire) for open. If problem was found, repair as necessary. After repairs, go to step  14. If problem was not found, go to next step.
  6. Check main fan motor supply voltage circuit (Black/Red wire) for open. If problem was found, repair as necessary. After repairs, go to step  14. If problem was not found, go to next step.
  7. Check supply voltage circuit to fuse and relay block 1 for open. If problem was found, repair as necessary. After repairs, go to step  14. If problem was not found, go to next step.
  8. Check fan 1 relay switch supply voltage circuit for open. If problem was found, repair as necessary. After repairs, go to step  14. If problem was not found, go to next step.
  9. Check engine main relay switch supply voltage circuit for open. If problem was found, repair as necessary. After repairs, go to step  14. If problem was not found, go to next step.
  10. Check engine main relay control circuit (Black/Yellow wire) for open. If problem was found, repair as necessary. After repairs, go to step  14. If problem was not found, go to next step.
  11. Remove fuse and relay block 1 from inner fender. Repair poor connections or high resistance in fuse and relay block 1 connectors. After repairs, go to step  14.
  12. Check main fan motor connector for poor connections. If problem was found, repair as necessary. After repairs, go to step  14. If problem was not found, go to next step.
  13. Replace main fan motor. After repairs, go to next step.
  14. Operate system to verify repair.
scientia non olet · About LEMON Manuals