Remove the speakers and trace the signal pairs (wires) to their origin, maybe they are still factory harnessed where you can access a connection point behind the head unit. Here are the factory color codes .
Hope this helps
Aduz
JEEP
P o w e r
Memory (+12v Constant)
Pink
Ignition (+12v Switched)
Violet/White
Ground (-)
Black
Illumination
Orange
Dimmer
Blue/White
Power Antenna
S p e a k e r s
Right Front (+)
White
Right Front (-)
Black
Left Front (+)
Green
Left Front (-)
Black/Yellow
Right Rear (+)
White/Black
Right Rear (-)
Brown
Left Rear (+)
Green/White
Left Rear (-)
Brown/White
×