Oil Pressure Gauge Testing
- Disconnect oil pressure sending unit connector. Oil pressure switch connector is located on right side of engine behind alternator. Using Gauge System Tester (Rotunda 021-00055), connect one lead of tester to Yellow/Red wire of oil pressure sending unit connector and other lead to ground.
- Set tester to resistance values. See Fig 1 .
- Turn ignition on and check to see that needle indicator displays correct values. Continue inspection for 2 minutes on each setting to correctly judge condition of oil pressure gauge. Allowable error is twice the with of gauge needle.
- If oil pressure gauge reads correctly, replace oil pressure sending unit. If oil pressure gauge does not read correctly, replace oil pressure gauge.