Left hand side speakers not working

[Scooz]

I just installed a new head unit and 2 new kenwood 6x8's in the rear. I left the front speakers stock. Now everythings in and the headunit works fine along with the right side speakers. But the new speaker on the drivers side doesnt work. All i can hear is a very tiny amount of static sometimes and the front stock speaker in my truck has sound coming out but its very low. Could it be a problem with the head unit? I wouldnt doubt a connection is mixed up but we double checked. I have a panasonic cq-c7403u head unit and a 1994 X 4 door. I forget the exact model of the kenwoods. Ill Get pictures of the install and specs soon.

 

[PandorasCustoms]

If you are hearing static, it sounds like there is a wire fault somewhere along the line.
It actually sounds like the unit is accidently grounding somewhere.

 

[Scooz]

You think the head unit could be grounding? I mean the ride side works fine. And im almost positive the left speakers were working before i replaced the head unit. Thanks for the lead, ill investigate it.

 

[PandorasCustoms]

Maybe not the radio, but the speaker it self.

 

[Scooz]

ok now both left side speakers emit sound but its much lower than the right side. and when i balance it to the left they don't make any sound...