Wagoneer L6-258 4.2L VIN C 2-bbl (1982)
Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection
Manifold vacuum should be present at the air control valve through the upstream solenoid when engine coolant temperature is below 160° F, and
should not be present when coolant temperature is above 160° F. If vacuum is not present when coolant temperature is below 160° F, check
vacuum hoses for air leaks and proper routing, and repair as necessary. If satisfactory, replace the switch or microprocessor.
