head unit problem

[ilovecoupes]

Okay, I’m on my third head unit now. I put a new the head unit utilizing a wiring harness. I was left over with a speaker amplifier and a radio ground. I had no sound. So after some searching I read about speaker amplifiers. so I tried by passing the "active" amplifier in the front speakers by matching:
the blue w/yellow front left neg -
the blue w/white front left pos +
the brown w/white stripe is front right pos +
the solid brown is front right neg -
I still have no sound!
also, I don't know if this affects any thing but a mute wire was left over on the headunit side
Thanks in advance