Radio Shack 120-2130A - Manual (Page 5)

the 14-pin connector into the stereo. If any wire connections
are made incorrectly or out of order, damage to the stereo is
possible.
Note: The wires in the wire harness have these colors and labels.
FRONT LEFT FRONT RIGHT
(White) + (Gray) +
(White/Black) - (Gray/Black) -
REAR LEFT REAR RIGHT
(Green) + (Violet) +
(Green/Black) - (Violet/Black) -
Wire
Harness
Black GROUND (-)
Red +12V to IGNITION
Blue/White AMP REMOTE
Yellow +12V to BATTERY
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.
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 power and speakers.
Connecting Ground, Power, and Optional Components
Follow these steps to connect the wire harness to ground, primary and
memory backup power, and optional components.
Note: The (Red +12V to Ignition) and (Yellow +12V to Battery) wires each
have an In-Line fuse Holder.