Product Review

Wires are either standard color coded or labeled for a simplified installation:
Wire Color / Function
Red: +12 Volt Accessory (There are 2 of these wires)
Yellow: +12 Volt Constant
Black: Chassis Ground (for Subaru only)
Blue: Amp Turn-On
Orange: Illumination
White: Left Front Speaker +
White/Black: Left Front Speaker -
Gray: Right Front Speaker +
Gray/Black: Right Front Speaker -
Green: Left Rear Speaker +
Green/Black: Left Rear Speaker -
Violet: Right Rear Speaker +
Violet/Black: Right Rear Speaker -

Ground Wire Note: The ground wire found in the wiring harness is only for select vehicles only.
Confirm that your vehicle's wiring harness has a corresponding ground wire.
If no wire is present, connect the ground wire of your aftermarket head unit to the vehicle's metal chassis.