This is for those of you that get that customer that wants an aftermarket deck or amp in his 10 speaker BMW 325. Below is a wire diagram to bypass the factory amp for aftermarket headunit and amps.
Besure to sell the standand BMW wire harness and ant. adapter, hook all of the wires up correctly. You can look at harness and use factory signal wires into factory amp (which is located in driver rear panal) or run your own wires.
Output wires (at amp) go like this. If only adding an aftermarket head unit be sure to wire at approx. 8 ohm per channel to not cause damage to deck.
-Left side:
-Door:
Tweeter = Yellow/red + , Yellow/brown -
Mid = Yellow/black + , Yellow/brown -
-Kick panel:
Full range = Blue/white + , Blue/brown -
-Rear:
Tweeter = Yellow + , Brown -
Mid = Yellow/black + , Yellow/grey -
-Right side:
-Door:
Tweeter = Blue/black + , Blue/Brown -
Mid = Blue/red + , Blue/brown -
-Kick panel:
Full range = Blue/red + , Blue/brown -
-Rear:
Tweeter = Blue = , Brown -
Mid = Blue/purple + , Blue/grey -
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Where theres is a wire there's a way.