Owner's Manual

6
The Scosche Touch Screen Interface replaces the Factory climate, convenience and personalization
controls built into the Factory Lexus Radio/Dash panel. This solution provides improved ergonomics
while adding touch screen capabilities unique to this system along with steering wheel control
functionalities. The following wiring diagram is a guide to help the user understand the wiring
connectivity for their new radio face panel installment. If you have any questions call our free
technical support help line at: 1-800-621-3695x3
UAC
SCOSCHE HVAC WIRING DIAGRAM
UAC
FIGURE 3A
To Back of Scosche U.A.C.
Touch Screen Module
Connect to U.A.C. Interface
Purple, Green, Orange Loops
Power Antenna
(White) Auxiliary In To OEM Input
(Red) Auxiliary In To OEM Input
To Climate Controls
GND
3.5mm
Key 2
Key 1
White= Left Front Positive (LF+)
White/Black= Left Front Negative (LF-)
Green= Left Rear Positive (LR+)
Green/Black= Left Rear Negative (LR-)
Black= Chassis Ground
Yellow= +12V Constant Power
Red= +12V Accessory
Blue= +12V Power Antenna
(Amp Remote)
Gray= Right Front Positive (RF+)
Gray/Black= Right Front Negative (RF-)
Violet= Right Rear Positive (RR+)
Violet/Black= Right Rear Negative (RR-)
Orange= Illumination
Gray= Mute
Pink= Speed Pulse
Violet= Reverse Trigger
WIRE COLOR CODES
To Aftermarket Radio UNIT
To Factory Harness
To Factory Harness
Note: Figure 3B
wiring diagram
connection is for
the back of the
aftermarket face
panel to help retain
panel safety features
Passenger
Seatbelt Light
Center Hazard Button
Passenger
Airbag Light
Back Panel Hazard,
Passenger Air Bag /
Seat Belt Light Wiring
Diagram
FIGURE 3B