1998 BMW 328i Stereo Head Unit Connections

Shown below are the pins wires coming out of the factory STEREO HEAD UNIT

1998 BMW 328i Stereo Head Unit Connections

First group of 16 PINS

Pin 1 Yellow Red Wire no connection
Pin 2 Blue Red Wire PIN 16 HIFI Amplifier (2nd group)
Pin 3 Yellow Black PIN 3 HIFI Amplifier (2nd group)
Pin 4 White Brown Wire Telephone Conn
Pin 5 Violet White Wire FUSED Battery Supply
Pin 6 Blue Black Wire Pin 2 HIFI Amplifier (2nd group)
Pin 7 Yellow Wire lower PIN 2 CD Changer
Pin 8 brown orange wire PIN 17 HIFI Amplifier (2nd group)
Pin 9 Red White Wire FUSED Batery Supply and PIN 1 HIFI Amplifier
Pin 10 Black White VSS Output of Instrument cluster
Pin 11 Brown orange Wire PIN 14 HIFI Amplifier (2nd group)
Pin 12 Brown orange Wire PIN 4 HIFI Amplifier (2nd group)
Pin 13 Grey Red Wire Interior light System
Pin 14 brown Orange wire PIN 1 HIFI Amplifier (2nd group)
Pin 15 Brown wire GROUND WIRE left side of Dash
Pin 15 ?White wire PIN 2 (1st group) HIFI Amplifier

SECOND Group of 10 PINS

Pin 1 Yellow Wire Pin 9 CD Changer
Pin 2 Blue Wire pin 10 CD Changer
Pin 3 Brown wire Pin 2 CD Changer
Pin 4 Grey Wire Pin 7 CD Changer
Pin 5 Black Wire Pin 3 CD Changer
Pin 6 Green Wire Pin 1 CD Changer
Pin 7 Violet Wire Pin 8 CD Changer
Pin 8 not available
Pin 9 Red Wire Pin 6 CD Changer
Pin 10 White Wire Pin 4 CD Changer

If you need a detailed stereo wiring diagram, please contact ATS


LF left front
LR left right
RR right rear
SPKR Speaker
GROUND ground supply connection
(+) positive wire connection
(-) negative wire connection

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