Oil Pressure Gauge

Consists of magnetic type gauge, a variable resistance sending unit and wiring on all "CJ7" and Scrambler models. There are 2 coils in gauge, one directly grounded, the other connected to sending unit. Resistance is controlled in sending unit by oil pressure. Magnetic fields are created around both coils in gauge. Needle is attracted to coil having greater current flow.

On all other models, oil pressure gauge system consists of CVR-powered gauge, variable resistance sending unit, and CVR. Gauge needle, attached to bi-metal strip, responds to temperature changes. It moves as current flows from CVR through heating coil around bi-metal strip, and to ground at sending unit on engine.