I just need the stereo wiring diagram for a 2003 subaru baja

Ok depending on if you have the macintosh system or not i have both regaurdless first;

with the macintoch system
without the macintosh system

this should help it is ALL the wiring diagrams for this year and model

Hi. Here's the diagram for your car.

2003 Subaru Baja Car Radio Stereo Wiring Diagram
Car Radio Battery Constant 12v+ Wire: Blue/Yellow
Car Radio Accessory Switched 12v+ Wire: Yellow/Red
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Green
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: N/A
Car Audio Front Speakers Location: N/A
Left Front Speaker Positive Wire (+): Brown/White
Left Front Speaker Negative Wire (-): Green/Black
Right Front Speaker Positive Wire (+): Red/Yellow
Right Front Speaker Negative Wire (-): White/Black
Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): White/Red
Left Rear Speaker Negative Wire (-): Red/Green
Right Rear Speaker Positive Wire (+): Blue/Green
Right Rear Speaker Negative Wire (-): Red