I have purchased a F900BT and a PAC C2R-CHY4. I tried to install everything today. Everything works except the SOUND!!! Any ideas on what went wrong? I do have one wire that is still loose, amp turn on input, and the directions say that it needs to be wired. Only problem is I dont know what to wire it to. Any ideas?

if you have a factory amplified system or are using an amplifier, the turn on wire must be connected. Basically its just color coding. make sure you connect the blue/white wire from the pioneer unit to the blue/white wire on the harness. If you dont make this connection the factory amp will not turn on and no sound.

Thanks for the help. That worked even though the wire I connected it to isnt connected to anything else. I wont worry about it though, it works!! Sounds great too.