The Oil Pressure Switch is designed to detect any issues with your car’s oil system.
Many online videos and posts only show one type of switch—the normally closed (NC) type—but in reality, there are two types:
Normally Open (NO) Switch: Closes the circuit when oil pressure is low, turning on the warning light.
Normally Closed (NC) Switch: Opens the circuit when oil pressure is low.
The challenge is that you might not know which type is installed in your car. That’s why it’s important to test both scenarios: a normal test and a test using an air blow.
If you see the switch status change when applying air, it indicates that your oil pressure is good.
in my case, Honda Pilot, it’s Normally Open , meaning when you measure the resistant at normal, you will not see any continuity, if you blow some air in, you will see the continuity.
Many online videos and posts only show one type of switch—the normally closed (NC) type—but in reality, there are two types:
Normally Open (NO) Switch: Closes the circuit when oil pressure is low, turning on the warning light.
Normally Closed (NC) Switch: Opens the circuit when oil pressure is low.
The challenge is that you might not know which type is installed in your car. That’s why it’s important to test both scenarios: a normal test and a test using an air blow.
If you see the switch status change when applying air, it indicates that your oil pressure is good.
in my case, Honda Pilot, it’s Normally Open , meaning when you measure the resistant at normal, you will not see any continuity, if you blow some air in, you will see the continuity.