CYLINDER GP-ANGLING 2405895 - Caterpillar

procedure tests the engine oil pressure switch for correct operation.
Turn the ignition switch to the ON position, but do not start the engine. The oil pressure lamp should turn on for 0.5 seconds. This checks the lamp to determine if the lamp is operating correctly.
If the lamp does not turn on for 0.5 seconds, check the electrical circuit to the lamp for a short or an open circuit. Check the engine oil pressure switch for a short or an open circuit. Check the bulb for the lamp for damage.
If the circuit is correct, replace the engine oil pressure switch. If the circuit is repaired or if the engine oil pressure switch or lamp are replaced, repeat this step to ensure that the lamp turns on for 0.5 seconds.
Remove the engine oil pressure switch from the cylinder block. Disconnect the wire connector on the wiring harness from the engine oil pressure switch. Use a 12 V battery as a power source. Connect the terminals of the battery, the engine oil pressure switch, and the leads of the 6V-7070 Digital Multimeter in series. Measure the current through the engine oil pressure switch.
The current should be 0.30 to 0.40 A. If the current through the engine oil pressure switch is greater than 0.42 A, replace the engine oil pressure switch.