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Home >> Jeep >> 2004 >> Wrangler X, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Powertrain Diagnostic Procedures >> DRIVEABILITY - Gas >> DTC P1490: Low Speed Fan Relay Control Circuit >> Possible Causes

Possible Causes

  1. LOW SPEED RADIATOR FAN RELAY OPERATION
  2. LOW SPEED RADIATOR FAN RELAY
  3. (F20) FUSED IGNITION SWITCH OUTPUT CIRCUIT
  4. (A16) FUSED B+ CIRCUIT
  5. (C23) LOW SPEED RAD FAN RELAY CONTROL CIRCUIT OPEN
  6. (C23) LOW SPEED RAD FAN RELAY CONTROL CIRCUIT SHORT TO GROUND
  7. PCM
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