Oil indicator doesn’t come on when Ignition is on

My car Oil indicator on dash board doesn’t come on when ignition is on.

Checked the oil pressure sensor and it works OK.

Then check the connecting socket and it seems OK too as when I connect it to the body earth getting alarm as low oil pressure.

But when I switch ignition on, the oil indicator doesn’t come on dash board.

If anyone know whether the car has a seperate sensor for oil indicator light.

In addition to that , does this car dash board have LED or replaceable globes as other ordinary cars?