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P1848 – Transfer Case Clutch Relay Fault

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Symptoms

  • 4WD not engaging
  • Grinding noise

Causes

  • Relay failure
  • Wiring issue
  • Connector corrosion

Diagnosis

  • Test relay
  • Inspect wiring
  • Check connector

Repair

  • Replace relay
  • Repair wiring
  • Clean connector
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