There's only the yellow wire going to it because the housing is grounded with a wire that screws into the ceiling frame by the rear view mirror. The wires go back to the dome light, across to the driver's side C-pillar, down to the inside rocker panel, and forward to the kick panel by the e-brake. The yellow wire and the blue wire for the "low fuel" light are together in their own harness. The yellow wire makes its way to the time delay relay that also does the ignition switch light (I think), and the blue wire goes to the low fuel relay by the glove box.
