Testing Oil Pressure Switches

The oil pressure at which the pressure switches react can be tested by temporarily installing an oil pressure gauge in parallel with the switch with a T-fitting and monitoring switch performance with a multimeter or test light, as shown in Fig. 7-2. See 8. Engine Technical Data. If the switches are performing properly, the oil pump is producing adequate oil pressure (see 7.2 Oil pump), and the system still warns of low oil pressure, then the dynamic oil pressure warning system control unit behind the instrument cluster should be replaced. See ELECTRICAL SYSTEM.

Fig. 7-2.

Pressure gauge and test light being used to test oil pressure switches.