J2: Check Wire Between Instrument Cluster & Water Temperature Indicator Sender Unit

With the ignition key in the OFF position, disconnect the instrument cluster connector C3 and the water temperature indicator sender unit connector. Measure the resistance of the Blue/White wire between the instrument cluster connector C3 and ground. See WIRING DIAGRAMS  . Is the resistance greater than 10,000 ohms? If yes, replace the instrument cluster. If no, service the Blue/White Wire.