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Test C: 4WD Indicator Does Not Light

NOTE: 4WD indicator does not illuminate with 4WD engaged. All other engine and transmission functions are normal.
  1. Review transfer case circuit description and perform necessary inspections. If system review and inspection is complete, go to next step. If system review and inspection is not complete, see TRANSFER CASE CIRCUIT DESCRIPTION  under OPERATION.
  2. Start engine. Place transfer case in 4WD. If 4WD indicator illuminates, check circuit for poor connections and intermittent conditions. See WIRING DIAGRAMS  . If 4WD indicator does not illuminate, go to next step.
  3. Check 4WD indicator control circuit (Orange/Black wire) for an open. Repair as necessary. After repairs, go to step  5 . If circuit is okay, go to next step.
  4. Replace PCM. After repairs, go to next step.
  5. Operate system to verify repairs. If problem has been corrected, system is okay. If problem has not been corrected, go to step  3 .
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