C 2500 Truck 2WD V8-305 5.0L VIN M SFI (1997)
Oil Pressure Gauge: Description and Operation
Circuit Operation
The Engine Oil Pressure is displayed by the Oil Gage. The pointer of the gage is moved by current flow through two Coils and is similar in operation to
the Fuel Gage. The Fuel Pump Switch and Sender senses Engine Oil Pressure. The Oil Sender has a low resistance (approximately 0 ohms) when Oil
Pressure is low (0 psi) and a high resistance (approximately 90 ohms) when Oil Pressure is high (80 psi).
