Oil Pressure Gauge

The oil pressure gauge displays the engine oil pressure. Current flow through two coils moves the pointer of the gauge and is similar in operation to the fuel gauge. The fuel pump oil pressure switch and sender senses engine oil pressure.

The oil sender has a low resistance (approximately 0 ohms) when the oil pressure is low (0 psi), and a high resistance (approximately 90 ohms) when the oil pressure is high (80 psi).