Test 10A - Repairing Oil Press SW Sense CKT For Short To GND
NOTE:
For connector terminal identification, see CONNECTOR IDENTIFICATION
. For wiring diagrams, see WIRING DIAGRAMS
. Perform TEST VER-1 after each repair.
CAUTION:
Always turn ignition switch to OFF position prior to disconnecting any module connector.
- Turn ignition switch to ON position. If oil warning lamp does not illuminate, go to TEST 10B. If oil warning lamp illuminates, turn ignitions switch to OFF position. 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/cm2 ) at idle, check mechanical condition of engine for low oil pressure. Repair as necessary. If gauge reading is 4 psi (.28 kg/cm2 ) or greater at idle, go to next step.
- Allow engine to reach normal operating temperature. If gauge reading is less than 4 psi (.28 kg/cm2 ) 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/cm2 ) or greater 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 switch to OFF position. Disconnect instrument cluster Gray connector. Using DRB 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 INSTRUMENT PANEL article in ACCESSORIES & EQUIPMENT.