Gauge Always Indicates High Pressure

Disconnect fuel pump/oil pressure switch/sender connector. Turn ignition on. Connect fused jumper wire between fuel pump/oil pressure switch/sender connector terminal "A" (Tan wire) and ground. See WIRING DIAGRAMS . If oil pressure gauge indicates low pressure, replace fuel pump/oil pressure switch/sender. If oil pressure gauge indicates high pressure, repair open in Tan wire between fuel pump/oil pressure switch/sender and instrument cluster. If Tan wire is okay, replace instrument cluster.