Grand AM V6-3300 3.3L (1992)
Oil Pressure Gauge: Description and Operation
The engine oil pressure is displayed by the Oil Pressure Gage. The pointer of the gage is moved by two coils and its operation is similar to that of the
Fuel Gage.
The Fuel Pump Switch/Oil Pressure Sender is connected to the junction of the two coils. It has low resistance when the oil pressure is low, and 90
ohms resistance when the oil pressure is high. This changing resistance changes the current flow through the coils. The magnetic fields of the coils move
the pointer from 0 to 550 kPa (80 psi).
