Continuity Check
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 1994 Mazda MX-5 Miata, 1992 Mazda MX-5 Miata, 1992 Mazda MPV, 1992 Mazda B2200, and 1991 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.
Using air pressure, check oil pressure switch. With air pressure less than 7.1 psi (.5 kg/cm2 ), switch should be closed. With air pressure above 42.7 psi (3.0 kg/cm2 ), switch will remain open until pressure drops to less than 7.1 psi (.5 kg/cm2 ). See Fig 1 .