I have an e46 with retrofitted navigation.

I've also added an OEM video module to get video in, and I use an iPhone with Apple A/V-cable.

The problem is that I can't get any sound from it. The picture works great, but the sound are missing. Earlier the display just typed "mute", but after I got som better connectors this dissapered, but still no sound.

I've tried to switch between the wires all sort of ways, but still no sound.

Anyone know what could be wrong?