Pioneer Install not so good...Questions?

Plasmite

Ok so recently I pulled my console apart to fix issues I had with dealership wiring and to place my bluetooth mic from my AVIC-X140BH in the stock location. I also went out and got the proper harness for this HU. The dealership had gotten the regular harness and wired it all up, and spliced RCA's into it to make it work. The installer who put in my rear view camera used 30ft of RCA to get the one plug to my head unit. Along with a power cable. Since they went around the outside of the car instead of going direct through the console, they needed all that length. I shortened it.

The camera, speakers and everything works. I had an issue with the connector plug to my iPod that I placed inside the console bucket, resolved that when I noticed the plug where the USB is was loose. Used some tape and good to go.

Now for my issue.... Music all plays fine, but when there is music only coming out from the left side, it's quiet. The music going to that side isn't quiet, just when the song has an instrument playing on that side, it will be really low in comparison to the rest of the music.

Did I plug a RCA cable in wrong? Or did my dealership have it wired up weird and I have to look at using that old harness again?

__________________
WISHLIST