Hey guys, about a year ago my rear speaker bar quit working, tried to replace with new speakers but it did not fix my issue. Wondering where the wires run back from the head unit, if there's a connector in either of the wheel wells etc. Any help would be greatly appreciated, I'm completely stumped.

 

I think they run along the driver's side, behind the spare tire and then forward along the edge of the floor.

That's a guess, though.