I need some help. I recived a base unit for a Sirius sattalite radio system, the Unit itself does not work but the FM transmitter does. I want to be able to re-wire it to accept a signal from my PSP to use a MP3 player in my car. The base unit has a 16 pin connector, when i opened it up there were 8 wires from the pin connector 5 black and 3 red. Now 1 black and 1 red will be hot and ground but what would the others be. My best guess is that the 4 left over blacks are for LR RR LF RF speaker feeds but then i still have 2 reds left?. Any help would be appreacted.