Oil Pressure Switch: Description
WARNING: This page is about a different car, the 2003 Dodge Intrepid, 2003 Chrysler Intrepid, and 2003 Chrysler Concorde. However, it is still accessible from the selected car via links, so may be relevant.
The engine oil pressure switch is located on the right side of the engine block. The switch screws into the engine main oil gallery. The normally closed switch provides an input through a single wire to the low pressure indicator light on the instrument cluster.