1992 Toyota Previa Replace a radio/CD player

Disconnect the negative battery cable.
Remove the attaching screws from the trim panel.
Remove the trim panel, being careful of the concealed spring clips behind the panel.
Disconnect the wiring from the switches if so equipped mounted in the trim panel.
Remove the mounting screws from the radio.
Remove the radio from the dash until the wiring connectors are exposed.
Disconnect the electrical harness and the antenna cable from the body of the radio and remove the radio from the vehicle.

To install:

Reconnect all the wiring and antenna cable first, then place the radio in position within the dash.
Install the attaching screws.
Reconnect the wiring harnesses to the switches if so equipped in the trim panel and make sure the switches if so equipped are secure in the panel.
Install the trim panel (make sure all the spring clips engage) and tighten the screws.
Connect the negative battery cable.
Check radio system for proper operation.