I got a problem where my F900 is draining the cars battery - it takes about 24 hours but when I hook it up it drains when I unhook the radio it is fine - any idea on how I could track that down?

I got a problem where my F900 is draining the cars battery - it takes about 24 hours but when I hook it up it drains when I unhook the radio it is fine - any idea on how I could track that down?

here you go http://avic411.com/forum/viewtopic.php?f=34&t=17013&start=180