Engine - Coolant Temperature Sensor/Switch: Testing and Inspection

INSPECT ENGINE COOLANT TEMPERATURE SENDER GAUGE RESISTANCE
Connect the wire harness as shown in the illustration, and adjust the ammeter pointer to indicate "0" using the slide rheostat, then read the rheostat indication.
If resistance value is not as specified, replace the engine coolant temperature sender gauge.
If resistance value is as specified, replace the combination meter.