Oil Pressure Switch Test
- With engine off, check for continuity between switch terminal and ground. If continuity does not exist, remove switch, clean threads and retest. If continuity exists, go to next step. If continuity does not exist, replace switch.
- Start engine. Check for continuity between switch terminal and ground. If continuity does not exist, switch is okay. If continuity exists, check engine oil pressure using a mechanical oil pressure tester. If oil pressure is greater than 4.3 psi (.3 kg/cm2 ), replace switch.