So I have a Panasonic DVD / touch screen head unit. I like it, don't love it. Anyway, my problem is this: I had it installed, worked fine, had an ipod cable that works well. I wanted to add a sirius unit to it, but being as it only has one accessory port on the back, you have to add what Panasonic calls an "expansion module", which is a separate box that is powered and you plug the accessories into this box, which in turn is connected to the accessory port on the back of the head unit. Now, my head unit was working fine with just the ipod cable plugged in, but now that I have the ipod / sirius plugged into the expansion box plugged into the head unit, the unit will shut itself off after about 6-7 minutes and is unable to be turned back on unless the car is shut off and turned on again. The lights on the head unit are still illuminated, but are non-responsive. There's one ground that may not be 100%, but it is in no way a loose connection, and it is not wiggling loose every time i drive the truck - it literally shuts itself off (even says "goodbye) after the same amout of time every time. It could be a defective expansion module thing, but I'm wondering if anyone out there has more experience with radios and such and can offer any insight.