The engine oil pressure switch is located on the right side of the engine block. The switch screws into the engine main oil gallery.
REMOVAL Raise vehicle on hoist. Remove heat shield that covers oil pressure switch. Disconnect oil pressure switch electrical connector. Position an oil collecting container under switch location. Remove switch by unscrewing from the engine block.
INSTALLATION Apply Mopar Thread Sealant to the switch threads. Install oil pressure switch. Connect electrical connector. Install oil pressure switch heat shield. Lower vehicle. Start engine and check for leaks. Check engine oil level and adjust as necessary.
Chrysler is lacking on diagrams for this.The only thing they show is the harness, but it is on the right side of the block, about mid way down: