Coolant Temperature Switch
- Remove switch from radiator or engine block. Place switch and thermometer in container of coolant. Connect ohmmeter to coolant temperature switch terminals. Slowly heat coolant.
- Note temperature at which continuity is present between switch terminals. Continuity should be present with coolant temperature greater than 207°F (97°C). Continuity should not exist with temperature less than 194°F (90°C). Replace switch as necessary.