"Concert" Radio With BOSE Sound System

Multi-pin connectors I, II, III, IV (on back of radio), terminal assignments


NOTE: Terminals which are not listed are vacant/unassigned.


20-pin connector I







1 - Line out, left-rear
2 - Line out, right-rear
3 - Low frequency Ground (GND)
4 - Line out, left-front
5 - Line out, right-front
6 - Switched positive supply (B+) for BOSE amplifier
8 - Clock signal
9 - Data signal
10 - Enable signal
13 - Bus data in (CD changer)
14 - Bus data out (CD changer)
15 - Clock (CD changer)
16 - Continuous positive supply (B+)
17 - Switched positive supply (B+) (CD changer)
18 - Low frequency-Ground (GND) (CD changer)
19 - Signal wire left channel (CD low frequency-L)
20 - Signal wire right channel (CD low frequency-R)

8-pin connector II (brown)
5 - Hands-free speaker (+)
6 - Hands-free speaker (-)

8-pin connector III (black)







1 - Vehicle speed sensor (Gala)
3 - K-Diagnosis
4 - Terminal 86s connection for ignition key switched on and off (S-contact)
6 - Illumination (terminal 58d)
7 - Terminal 30
8 - Ground (GND) (terminal 31)

10-pin connector IV (red)
1 - Telephone mute switch
3 - Telephone (low frequency +)
4 - Telephone (low frequency -)
5 - Navigation (low frequency +) (not applicable US/Canada)
6 - Navigation (low frequency -) (not applicable US/Canada)
7 - Navigation control line not (not applicable US/Canada)
9 - Display illumination (terminal 58d)
10 - CD Ground (GND)