Oil Pressure Warning Lamp/Indicator: Testing and Inspection

If the Oil Indicator stays "ON" with the Engine running:
^ Disconnect Fuel Pump Switch/Oil Pressure Sender. If the indicator goes "OFF", replace sender. 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 Indicator does not come "ON" before the engine starts, and the bulb is good, measure the resistance from the Fuel Pump Switch/Oil Pressure Sender connector to ground.

^ If the resistance is approximately 1 ohm, check CKT 31 for an open.
^ Connect a fused jumper between Fuel Pump Switch/Oil Pressure Sender connector terminal "A" and ground. If the indicator comes "ON", replace the sender. If the indicator stays "OFF", remove Instrument Cluster for repair.
^ Check that the printed circuit has no cracks or flaws and is mating properly with its connector.