Test L: Oil Pressure Gage Accuracy Test
Disconnect the Oil Pressure Sender/Switch connector. Connect one red clip of the J-33431 tester to terminal A (TAN) and connect the other red clip lead to terminal B (BLK). Set the resistance dials of the tester to 0 ohms, then move resistance to 90 ohms. The Oil Pressure gage should indicate low pressure, and then move high pressure as resistance is varied.^ If the Gage indicates correctly, replace the Oil Pressure Sender/Switch.
^ If the Gage does not indicate correctly, check the TAN (31) and BLK (154) wires and Gage connections. If they are good, replace the Instrument Cluster.