S4 V8-4.2L (BHF) (2004)
Multi-pin connector I, 20-pin - black
1. Line output - left rear, to Amplifier R12 (only with BOSE)
2. Line output - right rear, to Amplifier R12 (only with BOSE)
3. Line output - Ground, to Amplifier R12 (only with BOSE)
4. Line output - left front, to Amplifier R12 (only with BOSE)
5. Line output (front right) to Amplifier R12 (only with BOSE)
6. Switched positive to Amplifier R12
7. CAN-Bus High (Infotainment)
10. CD - Ground, to CD Changer R41
12. CAN-Bus Low (Infotainment)
13. CD data input from CD Changer R41
14. CD data output to CD Changer R41
15. CD-Clock from CD Changer R41
16. Battery positive (B+)- Battery positive (B+) - Terminal 30 to CD Changer R41
17. Switched positive to CD Changer R41
18. Line output - Ground, to CD Changer R41
19. Line output - left, from CD Changer R41
20. Line output - right, from CD Changer R41
Multi-pin connector II, 8-pin - brown
3. Right front loudspeaker (+) (not with BOSE)
4. Right front loudspeaker (-) (not with BOSE)
5. Left front loudspeaker (+) (not with BOSE)
6. Left front loudspeaker (-) (not with BOSE)