Electrical short inside the harness

1 = Solder coated wire to ground

2 = Harness protective tape

3 = Intermittent short

Solder coated wire pierced through the insulation of another circuit.

4 = Grounding foil

Fig 1: Identifying Solder Coated Wire, Harness Protective Tape And Grounding Foil

Courtesy of FORD MOTOR CO.