Test 70A - Oil Pressure Switch Sense Circuit Short To Ground

WARNING: This page is about a different car, the 1995 Eagle Vision, 1995 Dodge Intrepid, 1995 Chrysler New Yorker, 1995 Chrysler LHS, and 1995 Chrysler Concorde. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagrams, see appropriate article in ENGINE PERFORMANCE:

WIRING DIAGRAMS - 3.3L
WIRING DIAGRAMS - 3.5L
Perform TEST VER-1 after each repair.
CAUTION: Always turn ignition off prior to disconnecting any module connector.

Turn ignition on. If oil warning lamp does not illuminate, go to TEST 70B. If oil warning lamp illuminates, turn ignition off. Check engine oil level. Adjust oil level if necessary. If oil level is within specification, go to next step.
Remove oil pressure switch. Switch is located on lower left side of engine. Connect hand-held oil pressure gauge in place of switch and start engine. If gauge reading is less than 4 psi (.28 kg/cm(2)) at idle, check mechanical condition of engine for low oil pressure. Repair as necessary. If gauge reading is 4 psi (.28 kg/cm(2)) or more at idle, go to next step.
Allow engine to reach normal operating temperature. If gauge reading is less than 4 psi (.28 kg/cm(2)) with warm engine and at idle, check mechanical condition of engine for low oil pressure. Repair as necessary. If gauge reading is 4 psi (.28 kg/cm(2)) or more with warm engine and at idle, go to next step.
Check if oil pressure warning lamp is off. If oil pressure warning lamp is off, replace oil pressure switch. If oil pressure warning lamp is on, go to next step.
Turn ignition off. Disconnect instrument cluster Gray connector. Using scan tool in ohmmeter mode, check resistance on instrument cluster Gray connector terminal No. 5 (Gray wire). If resistance is less than 5 ohms, repair short to ground in Gray wire. If resistance is more than 5 ohms, repair or replace instrument cluster as necessary. See appropriate INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT.