I've isolated the ground fault to the harness that connects under the driver's kick panel (hood release knob). The harness goes to the rear through some cable molding.
This harness is dead shorted on the green/yellow stripe wire.
I've checked the trunk light cable and receptacle: all OK.
I'd be happy to drive the car with this harness disconnected except that the volts for the fuel pump are delivered by the offending harness.