Just for grins, disconnect the plug behind the driver side kick panel. That eliminates anything to the rear, if it still blows then you have narrowed it to one section of the car. If it does not blow it would be safe to assume it is to the rear.
Have you done any interior work, like carpet putting sill plates back on? It has happened in the past where the wires that run along the driver side get pinched under the sill plate, sometimes it shows itself almost immediately, sometimes it takes a bit for the edge of the plate to work through the insulation and ground things out.