INSTRUMENTATION SERVICE MANUAL NUMBER 22
Page 4D-20 90-860074--1 FEBRUARY 2002
Oil Pressure Switch
TESTING
When the engine is stopped the switch is normally closed.
1. Remove the harness wire from the switch. Insulate to avoid possible short circuit.
2. Connect continuity meter between switch terminal and switch case (negative –). With
the engine stopped the meter should indicate full continuity.
NOTE: Sender shown removed for visual clarity.
74446
70686
b
c
a
Typical
a-Oil Pressure Audio Warning Switch
b-Harness Wire
c-Continuity Meter And Connection Points
Oil Pressure kPa (psi) Switch Condition
0 (0) Closed
31 - 52 (4.5 - 7.5) Open
INSTALLATION
1. Coat threads of switch with Loctite Pipe Sealant with Teflon.
2. Install switch and tighten securely.
3. Connect harness wire. Seal terminal with Liquid Neoprene.
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