E46 Aftermarket Stereo Problem

I recently wired an aftermarket stereo I just bought into my 99' 328i (without the wiring harness). The radio turned on but there is no sound coming out of the speakers at all which is why I bought the new radio in the first place. Since this isn't working either I'm starting to think it's the stock amp located in the trunk. I wired the blue remote wire from the aftermarket radio to the white wire coming out of the car and it still wouldn't turn on. But one thing I noticed is there is a whole separate wire labeled "amp" on it that plugged into the stock radio but not the aftermarket one. Does that cable need power for the amp to turn on? Any ideas on anything above would be helpful. I will send pictures if you'd like.

you need to connect the blue wire ( amp power ) from the aftermarket radio to the white-power antenna in the bmw loom for radio and also for the amp power .

you can also wire 2 cables right to the speakers to check if the radio I ok

Originally Posted by Shay-E46

you need to connect the blue wire ( amp power ) from the aftermarket radio to the white-power antenna in the bmw loom for radio and also for the amp power .

you can also wire 2 cables right to the speakers to check if the radio I ok

or you could spend the $12 and buy the proper wiring harness in the first place so that
a) you are not cutting into the factory wiring
b) it works right the first time, and
c) you can easily remove it and your car is back to stock

Originally Posted by //Maxwelljuppercut

or you could spend the $12 and buy the proper wiring harness in the first place so that
a) you are not cutting into the factory wiring
b) it works right the first time, and
c) you can easily remove it and your car is back to stock

Hi the guy said he already did the wire without the original connector , anyway some of us like me got our E46 when the loom was already cut .

glad I could help .

I already tried wiring the white wire to the blue remote wire and still got nothing. Could it be that my factory amp needs replacement?