Dual piece o shit
 

I have a Dual CD770 head unit that im trying to install in a 2000 sunfire.Got the color codes for the car harness online all wires seem to be connected properly.Turns on,plays CD fine but no sound at all. First i thought i had the polarity switched up but not that easy...something simple more than likely but im just about to give up on it.Need help before it gets smashed in the driveway!

did you cut the connector right off? my guess is that it has a factory amp!

so what other/extra connections do i need to make to get this thing working

Would it help or make a difference if i connected the ground to the chassis instead of the factory harness???

Ground wire won't make a difference in this matter, It honestly just sounds like your missing a wire!!

missing a wire!? well damn i have no idea what to do all the wires in the harness are used, unless i need to run my own wire for something?

All the wires are hooked up, have you tried to turn on the radio instead of the deck?

i have the radio works fine

and you can hear it?

ok wait are you telling me i need to keep the factory deck hooked up?!