Disconnect the cable from the negative terminal of the battery. For the radio in the Samurai, pull off the radio knobs and remove the retaining plate nuts with a deep socket. Remove the bottom retaining screws and allow the radio/console unit to drop slightly. Unscrew the nuts on the front brace and remove the radio from the back. Installation is the reverse of the removal process. For the 1998 and earlier Sidekick/Tracker radio, remove the rear retaining bracket screw, take out the four pins from the corners of the radio front, and disconnect the electrical connectors and antenna lead from the radio. Installation follows the reverse order. For the front speaker, remove the speaker grilles from the instrument panel by taking out the two screws, then remove the screws from the speaker and disconnect the electrical connector. Installation is the reverse of removal. For the rear speaker, remove the interior trim side panel, take out the speaker securing screws, and disconnect the electrical connector. Installation is the reverse of removal. For the 1999 and later Sidekick/X-90Nitara and Tracker radio, remove the three center trim bezel retaining screws, then take out the four retaining screws at each corner of the radio and pull it out for access to the electrical connector. Unplug the connector and remove the radio, with installation being the reverse of removal. For the speakers, locate the speaker; rear speakers are accessible after opening the liftgate and detaching the trim panel, while front speakers require removing the door trim panel. Remove the retaining screws, withdraw the speaker sufficiently to allow the connector to be unplugged, and remove the speaker from the vehicle, with installation being the reverse of removal.