I purchased a Sansa Clip Zip today mainly for car use. I installed a car stereo with a stereo input jack and a usb charge jack and I figured I could mount the mp3 player on the dash and have it plugged in for most of the time. Well I got all the wires routed through the dash and it plays great but there’s one problem: I can’t play music when the USB cable is plugged in. It plays fine on my AC wall adapter but for some reason when it’s in the car, all I hear is a faint “tap tap tap tap” sound. It goes away when I disconnect the usb cable but I was hoping I could just keep both cables plugged in so it can charge while it plays. It charges fine through the car but like I said, when it’s charging/[plugged in, the music stops
I also found out that if I just touch the outside metal of the usb connector to the metal usb jack on the radio, it stops playing and makes that “tap tap tap” noise; I don’t even have to have it plugged in. At first I thought that having both the audio and USB cable close together might interfere with each other but I tried using a different usb cable outside the dash but the same thing happened.
Do you have any ideas on how I could get it to charge and play at the same time when in the car?
Thanks for the help!