Comanche 4WD L6-242 4.0L VIN L FI (1990)
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Oil Pressure Warning Lamp/Indicator: Testing and Inspection
1.
Turn ignition switch to Run position.
2.
Touch oil pressure switch terminal S to ground.
3.
If indicator illuminates, replace switch.
4.
If bulb is satisfactory, repair open to instrument cluster connector terminal B7.