On the 3.7L and 4.7L engines, the oil pressure
switch is located at right front of engine just above the oil filter. On
the 5.7L engine, the oil pressure switch is located at right front of
engine.
hope this helps you
Fig.: Oil pressure switch (sending unit) schematic
The low oil pressure warning lamp will illuminate when the ignition switch is turned to the
ON
position without the engine running. The lamp also illuminates
if the engine oil pressure drops below a safe oil pressure level. To
test the system, perform the following:
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