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SENDING UNIT TEST When a problem occurs with a cluster gauge, be- fore disassembling the cluster to check the gauge, (1) Sending units and wiring can be checked by grounding the connector leads, at the sending unit, (2) With the ignition in the ON position; a grounded input will cause the oil, fuel or tempera- LOW OIL PRESSURE/CHECK GAUGES The low oil pressure/check gauges warning lamp will illuminate when the ignition key is turned to In the cluster assembly without tachometer, the low oil pressure lamp will illuminate if the engine oil In the cluster assembly with tachometer, the Check Gauges warning lamp illuminates when there is a To test the system turn ignition key to the ON po- sition. If the lamp fails to light, inspect for a broken COMBINATION OIL UNIT TEST The combination oil unit has two functions: warning/check gauges lamp on until there is oil pres- (2) The sending unit provides a resistance that varies with oil pressure. (3) To test the normally closed oil lamp circuit, dis- connect the locking connector and measure the resis- (4) If there is oil pressure, the ohmmeter should read an open circuit. (5) To test the sending unit, measure the resis- tance between the sending unit terminal and the (6) The ohmmeter should read between 30 to 55 ohms, depending on engine speed, oil temperature, (7) If the above results are not obtained, replace the switch. BRAKE SYSTEM WARNING LAMP TEST The brake warning lamp illuminates when parking brake is applied with ignition key turned ON. The Fig. 5 Combination Oil Unit (2.5L) Fig. 6 Combination Oil Unit (3.0L) Fig. 7 Combination Oil Unit Test Ä INSTRUMENT PANEL AND GAUGES 8E - 3 |