Component Tests and General Diagnostics

OIL PRESSURE INDICATOR LOW
If the Oil Pressure Indicator stays "LOW" with the Engine running:

^ Disconnect Fuel Pump/Oil Pressure Switch. If the indicator goes to normal, replace Switch. If the indicator stays "LOW," check CKT 31 for short to ground.

^ Inspect the Instrument Cluster printed circuit for a short. Also check that the printed circuit is mating properly with its connectors and not shorted there.

INDICATOR WILL NOT GO LOW
If the Oil Pressure Indicator does not go to "LOW" before the Engine starts:

^ Measure the resistance from the Fuel Pump/Oil Pressure Switch connector to ground. If the resistance is approximately 1 ohm, check CKT 31 for an open.

^ Connect a fused jumper between Fuel Pump/Oil Pressure Switch connector terminal "B" and ground. If the indicator goes to "LOW," replace the Switch. If the indicator stays stays at normal, remove Instrument Cluster for service.