5
The following steps are provided as a general guide. For specific information for your
vehicle, consult the instructions supplied with your vehicle-specific S3-1 harnness
(sold separately).
1. Disconnect the negative battery cable from the battery to avoid short circuits.
2. Remove and unplug factory stereo. (If needed, call Scosche Toll-free Tech for
assistance with radio removal: (800) 621-3695 Ext. 3)
3. Match and connect the Power/ground wires from the S3-1 Vehicle specific
harness to the wires provided with your stereo. The color codes on the Scosche
harness are designed to match most aftermarket stereos.
• Take note that some of the wires for your new stereo come from the S3-1
interface box itself and not the vehicle connectors.
4a. The S3-1 speaker connections are pre-terminated with RCA jacks for installations
requiring Line input: Toyota JBL, GM Standard Bose and Ford Premium sound.
4b. If your vehicle does not have a Bose or Premium system, cut off the RCAs
and wire the speaker leads directly to the speaker wires from the new stereo.
4c. All FORD harnesses must have RCAs cut on vehicle side of circuit board.
5. Tape any unused wiring to prevent short circuit.
7. Reconnect the negative battery cable**.
** For GM vehicles, alternate power up (initialization steps) are required.
See General Motors specific notes section.
8. As you install your new stereo, place the S3-1 module(s) and harnesses in the rear
of the dash cavity behind the stereo.
OPTIONAL: Cable ties or double-sided tape can be used to secure the module, but
are not included.
BASIC WIRING INSTRUCTIONS
CHRYSLER & TOYOTA INSTALLATION NOTES
CHRYSLER: PREMIUM ALPINE, BOSTON & INFINITY SYSTEMS
These factory amplified sound systems are driven and digitally controlled by a single
set of left/right input channels only. The aftermarket radio does not have the ability to
control fade or balance adjustments on these types of systems. There is NO front/rear
fader control. The balance and fader are set to center by interface control software.
TOYOTA JBL / LEXUS PREMIUM SYSTEMS
These factory amplified sound systems are driven and digitally controlled by a single
set of left/right input channels only. The aftermarket radio does not have the ability to
control fader on these types of systems. There is NO front/rear fader control. The fader
is set to center by interface control software.
