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Home › Jeep › 2004 › Wrangler Sahara, Standard › Repair and Diagnosis › Engine Performance › System › Powertrain Diagnostic Procedures › DRIVEABILITY - Gas › DTC P1489: -High Speed Fan Relay Control Circuit › Possible Causes

Possible Causes

  1. HIGH SPEED RADIATOR FAN RELAY OPERATION
  2. HIGH SPEED RADIATOR FAN RELAY
  3. (F20) FUSED IGNITION SWITCH OUTPUT CIRCUIT
  4. (A16) FUSED B+ CIRCUIT
  5. (C27) HIGH SPEED RAD FAN RELAY CONTROL CIRCUIT OPEN
  6. (C27) HIGH SPEED RAD FAN RELAY CONTROL CIRCUIT SHORT TO GROUND
  7. PCM
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