same

i checked all the wires before, even switching someof them around or running direct connections to the battery and ground (by the way, the head unit by default turns the volume up 1/4 of the way the first time you hook it up, when i directly connected the battery to the radio the radio started to turn it self up and then shut completly off). None of this works. i havent however checked to see if the wires have been mashed together somewhere. although it shouldn't matter if i did the direct connections. my brother is a mechanic and he said it could be something called the body control module (BCM). its an electrical sensor that does, uhh, something. anyway i think ill get that checked out. anyone hear of it?