you guys are assuming the programming is even right.....

when I do a gut a rip EVERYTHING out, install my panels and din rail and trace/label as i re terminate each line. I leave nothing to chance, when a job is this bad there probably arent even labels and to sit there and label "Left right center etc etc" as you pull out the amps is a waste of time. Seriously, what gives you the idea that Left is even going to the left channel speaker.

Terminate everything to din panels and then once everything is labeled start tying in the equipment.