Originally Posted by 4EST
you could check the wiring, after all, it;s just a cable with no active components
That's wildly inaccurate. It's got passive components to tell the dock connector what's plugged in (an AUX out) as well as active components to interface the USB it pluggs into to UART for the iPod Accessory Protocol (a USB<>UART interface, specifically I think a PL2303). There's lots to go wrong.