- Detach the coolant temperature sensor electrical connector.
- Turn the ignition switch to the ON position. The temperature gauge should be at its lowest position.
Ground the temperature gauge sending unit connector pin 3, as shown. Turn the ignition switch
. The temperature gauge should be at its highest position. After the seat belt lamp goes out, the cluster should chime for about 8 seconds.
- If OK, check the temperature sending unit connector for proper connection. If connections are OK, replace the sending unit.
- If not OK, and the high temperature chimes but the gauge shows cold, replace the gauge assembly. If the gauge still does not work, replace the printed circuit board.