I need help installing a new headunit. How do you bypass the JBL amps? Everything is working on the headunit just cant get sound from the speakers. What do I need?

Are you just installing a head unit? If so, ensure you are using the proper harness. Make sure you have the one with a wiring harness. If your factory amp is working, you should hear sound.

When my friend put in my head unit, everything but the 2 front speakers work, idk what it is and It sounds good still with just the two tweeks and back speakers Id liek to have the 2 up front work 2 but Idk :q:q:q:q about speaker wiring and what not,lol.

better off, doing what i did, and just running new wires. its easy enough.

Buy this (http://www.scosche.com/scosche_caraudio.aspx?CategoryID=229&ItemID=SLC4) from Wal-Mart for about $17. It will allow you to keep the factory amp and match the volume with the stock JBL speakers.