Audio Systems: 2005 dodge ram, radio harness, vehicle computer

Question
I took out my raz with infinity amp stereo (7 speakers)and put in a pioneer,as alot of you probably already know,I have no sound,How do I turn on the factory amp? Or do I have to use a bus adaptor? I heard about a Blue/White wire to power up the amp,but cant find one in the factory harnerss.

Answer
look for the amplifier remote wire on the radio harness you are using  if the vehicle was made in late 2004 it will work
if the vehicle was made in 2005 you need the module  best price i found was oemautosound.com they are about $85.00
good luck

ps removing the amplifier is a very bad idea don't try that  you can damage the vehicle computer and sensors