[Chigga]

Originally Posted by ctuna

Step one there is either power to the Radio or not
Radio has a fuse on the back and one in the cabin fuse panel.
If you have a low battery the IBS may be turning off power
to the Radio.
If you have done the above checks and there is power on the
Radio connector and it doesn't turn on then its the radio.

IBS system can turn accessory's such as the Radio off if it
detects a low battery or is defective.
Read first pdf

electical e90 pdf
http://www.google.com/url?sa=t&rct=j...,d.cGU&cad=rja
http://www.google.com/url?sa=t&rct=j...85464276,d.cGU
http://www.google.com/url?sa=t&rct=j...85464276,d.cGU

Ctuna, I did all that on a 2006 323i, but the radio still refuse to power on.

- Had new battery, coded.
- The lights come on around the stereo,chime works etc.

But the radio just won't power on, even swap out to another known working unit, still won't power on, then bought the aftermarket harness and swap it to an aftermarket head unit that was working, it's not powering on, so I'm bit at loss here, why wouldn't it power on? I check all the fuses and everything seems fine, I just can't get 12v power to the headunit.

Any help would be great.