To begin, you should, first open the hood, then take the negative battery cable remote terminal away from the remote battery post. Remove the trim around the driver's door, take out the three mounting screws and disconnect the connector before looking at the master switch on these models. To remove the switch from a LHS or 300M, use a trim stick (special tool #C-4755) to raise the switch bezel, eliminate the wire connection at the back and bring out the unit from the vehicle. Move the passenger door trim away from the door, unconnect the wire from the switch and then take the switch out both from the bezel and your car. Open the rear door, lift the edge of the switch with a trim stick, while pressing forward on the bezel, pull the switch from its place, push out the tabs around the connector and remove the switch. On Intrepid and Concorde models, attach the master switch and its wire to the harness, secure these with three screws, put the door trim panel back and fasten the negative battery cable to its remote terminal. For LHS and 300M, link the wire connector to the switch, glue the switch into the trim panel and reattach the negative battery cable remote terminal. When installing the switch and wires for passenger change, place the switch and connector, install the door panel and return the negative battery cable remote terminal to the proper position. Take the rear door switch, connect it to its connector, place the switch in the door panel and attach the negative battery cable remote terminal.