Troubleshooting Hints

1. Make sure all Mechanical Components are operative before diagnosing electrical portion of Four Wheel Drive system.
2. To determine whether Vehicle is in Two-Wheel Drive or Four-Wheel Drive, lift it up so wheels can spin freely.
3. CHECK to see that 4WD and ILLUM Fuses are not open. If open LOCATE and REPAIR source of overload and REPLACE Fuse.
- CHECK for a broken (or partially broken) wire inside of the insulation which could cause system failure but prove "GOOD" in a Continuity/Voltage CHECK with a system disconnected. These Circuits may be intermittent or resistive when loaded, and if possible, should be CHECKED by monitoring Fuse Voltage drop with the system operational (under load).
- CHECK for proper installation of aftermarket electronic equipment which may affect the integrity of other systems.
4. While performing the Diagnostic procedures, Ignition Switch must be in RUN and 4WD Control Lever must be in 4WD ENGAGED position.