ISO connectors back of car radio

ISO
Connector B

SPEAKERS

B 1 Right Rear +

B 2 Right Rear -

B 3 Right Front +

B 4 Right Front -

B 5 Left Front +

B 6 Left Front -

B 7 Left Rear +

B 8 Left Rear -

ISO
Connector A

POWER

A 1 GALA  Geschwindigkeitsabhängige Lautstärkeranpassung or SCV  speed-dependent volume control.

A 2 Mute from Cell-Phone

A 3 RFLS Ruckfahrtlichtschalter - the reversing light switch.

A 4 Memory Power        (12V direct from Battery)

A 5 Power for Electric Antenna

A 6 Dial-light illumination (car side light circuit)

A 7 +12V Main Power (Switched via Ignition key)

A 8 Ground (Chassis)