1. Power Wires:
- Red: Constant 12V power (Battery)
- Yellow: Ignition-switched 12V power (Accessory)
2. Ground Wire:
- Black: Ground (Chassis)
3. Speaker Wires:
- White: Left front positive
- White with black stripe: Left front negative
- Green: Right front positive
- Green with black stripe: Right front negative
- Gray: Left rear positive
- Gray with black stripe: Left rear negative
- Purple: Right rear positive
- Purple with black stripe: Right rear negative
4. Other Wires (Optional):
- Blue: Power antenna control (may be labeled as "Ant")
- Brown: Dimmer (illumination) wire (may be labeled as "Illumi")
- Orange: Amplifier turn-on (remote) wire (may be labeled as "Amp")
- Light green: Speed sensor wire (for speed-sensitive volume adjustment)
Please note that the wiring colors may vary between different years and models of the Mazda Capella, so it's always best to refer to the specific vehicle's wiring diagram for accurate information when installing or troubleshooting a stereo.