Temperature Sensor (Gauge): Testing and Inspection

When a malfunction occurs with a cluster gauge, before disassembling the cluster to check the gauge, check for a defective sending unit or wiring as follows:
1. Ground sending unit connector leads, at the sending unit, in the vehicle.
2. With ignition in ON position, a grounded input will cause the fuel or temperature gauge to read maximum or above.

Additional diagnostic information can be found at Body Control Module, Testing and Inspection, Diagnostic Charts. Testing and Inspection