Oil Pressure Indicator Diagnosis - Gauge Cluster

If the Oil Pressure Indicator stays "ON" with the Engine running:
^ Disconnect Fuel Pump/Oil Pressure Sender/ Switch. If the indicator goes to normal, replace Switch. If the indicator stays "ON," 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.

If the Oil Pressure Indicator does not go to "ON" before the Engine starts:
^ Connect a fused jumper between Fuel Pump/Oil Pressure Sender/Switch connector terminal "A" and ground. Turn Ignition Switch to "RUN" (Engine not running). If the indicator goes to "ON", replace the Sender/ Switch. If the indicator stays at normal, check CKT 31 for an open. If OK, remove Instrument Cluster for service.