dodge 2004 quad cab wiring?

 i have installed a new head unit, but have no sound, i used a new metra harness adapter and ground wire, please advise of possible solutions.aloha an' hooey ho!

how many wires were on the old harness that went into the deck? I know most of these trucks came with an amp2009 0-1000 Trunk WR 154.0DB 2009 1001+ Trunk WR

2007 USACI World Champion

2007 World Record

2006 USACI Finals 2nd Place

2004 and up Dodge trucks that have an Infinity sound system use data for turn on and even if you try to get sneaky you still can't use the amp as the radio sends a fixed level straight to the BCM and the BCM does all the fading, level control and protection and such. You have to bypass the amp in these vehicles.  Now when you take out the amp that is behind the glove box on the top left, find out if the there are two plugs in the factory amp or one plug. Metra makes harness' for both these applications. Give them a call and tell them you need an amplifier bypass harness for whichever plug system you have. Most 04's use the two plug setups.