Optimus 120-2154, 120-2155 manual

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4 Ohms. Your local RadioShack store carries a full line of speakers.

You must connect the GROUND, +12V TO IGNITION, and +12V TO BATTERY wires first, then make all other connections as described in the following sections before you plug the harness with the 14-pin connector into the stereo. If you do not make connections in the order shown, damage to the stereo is possible if any wire connections are made incorrectly.

You must connect a separate wire to each speaker terminal as described in the following procedure. Do not use a common wire or chassis ground for any speaker connection.

Note: The wires in the wiring harness have the following colors and labels.

(Black) - Ground

(Red) - +12V to Ignition

(Yellow) - +12V to Battery

(Blue/White) - AMP Remote Turn on 500 mA MAX

(White) - Front Left Speaker (+)

(White/Black) - Front Left Speaker (-)

(Gray) - Front Right Speaker (+)

(Gray/Black) - Front Right Speaker (-)

(Green) - Rear Left Speaker (+)

(Green/Black) - Rear Left Speaker (-)

(Violet) - Rear Right Speaker (+)

(Violet/Black) - Rear Right Speaker (-)

Using an Adapter Harness

If you are replacing an existing stereo, or if your vehicle has been factory-wired for autosound components, you might be able to use an adapter harness to connect the power and speakers. RadioShack stores sell adapter harnesses for most vehicles.

Follow the directions that come with the adapter harness to temporarily connect the ground, power, optional components, and speakers. Then go to "Connecting the Antenna" below.

Connecting Ground, Power, and Optional Components

Follow these steps to connect the harness with the 14-pin connector to ground, primary and memory backup power, and optional components.

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Contents CD Player AM/FM Stereo TunerGeneral Page Before YOU Begin the Installation Making the Connections Page Page Page Page Testing the Connections Mounting the StereoRemoving the Stereo from the Dash Page Using the Control Panel Installing the Control PanelRemoving the Control Panel Setting the Clock Adjusting the SoundBasic Operation Turning the Stereo on and OFF Favorite Sound Memory 12-2155 only Displaying the Clock Turning the KEY Tone on and OFFRadio Operation Playing the Radio Memory Tuning Page CD Player Operation Digital Sound Playing a CDShuffle Play Selecting a TrackAudible Search Repeat PlaySwitching Between the CD and the Radio Scanning the TracksResetting the Stereo FCC Wants YOU to Know CD Care Tips Replacing a FusePage Signal Format RadioCirc