Electronic Testing: Notes
The electronic synchronizer is used to provide 4WD engagement while vehicle is in motion. The system consists of a relay, electromagnetic clutch coil, front axle switch and an indicator light.
The clutch coil receives power through transfer case switch. See WIRING DIAGRAM . When energized, the clutch coil provides synchronization. When shift is complete, front axle switch energizes transfer case relay. Relay is normally closed, when relay is energized, power is cut to clutch coil. When transfer case is shifted to 2WD, power to indicator light is cut. For specific part location see ELECTRONIC COMPONENT LOCATION TABLE .
ELECTRONIC COMPONENT LOCATION
| Component | Location |
|---|---|
| Clutch Coil | In Transfer Case |
| Clutch Coil Relay | On Cowl, Under Hood |
| Front Axle Actuator | Right Side Of Differential Case |
| Indicator Light | Above Shifter |
| Transfer Case Switch | Threaded Into Transfer Case At Linkage |
NOTE:
For all electronic test procedures, refer to WIRING DIAGRAM
at end of article.