Instrument Cluster Test 15A - Oil Pressure Switch Sense Circuit Short To Ground
NOTE:
Perform INSTRUMENT CLUSTER TEST 1A
before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION
. For wiring diagrams, refer to WIRING DIAGRAMS
. Perform, after each repair, VERIFICATION TEST VER-1A - BODY VERIFICATION TEST
.
CAUTION:
Always turn ignition switch to OFF position prior to disconnecting or connecting any module connector.
- Turn ignition on. If oil warning light illuminates, go to next step. If oil warning light does not illuminate, go to INSTRUMENT CLUSTER TEST 15B . Turn ignition off.
- Turn ignition off. Check engine oil level. Adjust as needed. Disconnect oil pressure switch. See Fig 1 . If oil pressure warning light is illuminated, go to step 5). If oil pressure warning light is not longer illuminated, go to next step.
- Remove oil pressure switch. Using appropriate pressure gauge, start engine and read oil pressure. If oil pressure is 4 PSI or greater, go to next step. If oil pressure is less than 4 PSI, see appropriate article in ENGINE MECHANICAL Section.
- Allow engine to reach normal operating temperature. If oil pressure is 4 PSI or greater, replace oil pressure switch. If oil pressure is less than 4 PSI, see appropriate article in ENGINE MECHANICAL Section.
- Disconnect instrument cluster. Using external ohmmeter, measure resistance between ground and terminal No. 10 (Gray wire) on instrument cluster Blue 10-pin connector C2. If resistance is less than 5 ohms, repair Gray wire for short to ground. If resistance is 5 ohms or greater, repair or replace instrument cluster.