Stereo Head Unit loses Aux input

[moore37135]

I've installed the BWM OEM Aux Input cable into the back of the business stereo head unit, and it works like a champ with a bluetooth receiver. Unfortunately, though, when I plug a USB charger into the cigarette lighter to charge the bluetooth unit, the AUX option on the stereo head unit disappears. Unplug the charger from the cigarette lighter, cycle power on the head unit, and everything returns to normal.

Any idea on a fix or workaround?

Thanks in advance for ideas and assistance!

Dan
2003 Z4 2.5i E85
2008 535i E60

 

[TempusFugit]

Have you tried power cycling the head unit/going back to aux after starting the usb charge? Whike its still connected.

Some devices send a small digital signal or pulse when they are plugged in to usb, this can cause the aux mode to drop out on the head unit. With my phone i just reselect FM and back to aux again and it will run fine while charging.