Initial Inspection and Diagnostic Overview

Important: Review the system operation in order to familiarize yourself with the system functions. Refer to the following:
^ Transfer Case Description
^ Transfer Case Circuit Description


Visual/Physical Inspection
^ Inspect for aftermarket devices which could affect the operation of the system. Refer to Checking Aftermarket Accessories in Diagrams/Diagnostic Aids.
^ Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
^ Inspect all related ground points for being clean and tight.


Intermittent
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent and Poor Connections in Diagrams/Diagnostic Aids.


Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:
^ Four-Wheel-Drive Does Not Disengage. Four-Wheel-Drive Does Not Disengage
^ Four-Wheel-Drive Does Not Engage. Four-Wheel-Drive Does Not Engage
^ Four-Wheel-Drive Indicator Does Not Light.Four-Wheel-Drive Indicator Does Not Light
^ Four-Wheel-Drive Indicator Does Not Turn Off. Four-Wheel-Drive Indicator Does Not Turn Off