The left side barely makes any sound at all. The front is the original speaker and the back is an aftermarket that I installed a long time ago. The head unit is a pioneer that I put in a while back too.

When I play with the balance and move everything to the left you can barely hear any sound, then move it all to the right and it's nice and loud. I'm pretty sure it always did this even before I installed the aftermarket stuff but I just never really bothered to get down to the bottom of it until now.

It can only be one of two things correct? Either the outputs on the HU are bad for the left channel or the wires that run down the left side of the car are bad right? I should probably start by rewiring the left side first?

Thanks,

Sean