Open circuit conditions are caused by things like blown fuses, cut or broken wires, disconnected "connector" plugs, or corrosion buildup anywhere in any connections or connectors.
your instrument panel lights can be dimmed(thumb wheel switch) down to practically no lights at all on your instrument cluster, this switch should be located most likely on the dash, left hand side of steering column. If this does not fix the problem ,then you have to check your fuse panel to see if you have a burnt out fuse.
The fuse panel is located under the left side of the dashboard.
Side panel on driver's side of instrument panel. To access open driver's door and slide forward panel by pulling on indentation.
It might just be the fuse is blown.
Possible bad headlight switch. The switch is actually 2 switches in one. One side turns on the headlights and the other contacts turn on the tail lights which also feed the instrument panel through usually a 5 amp fuse.
Not sure if the 2003 is the same, but on my 2001 I needed to replace Fuse 32, which is located in the fuse panel under the instrument panel on the driver's side
There are several fuses relating to the lighting. The fuse panel is at the left end of the instrument panel (drivers side). Open the divers door and look about armrest high to locate the fuse panel cover.
Front seating area, driver side, behind instrument panel, passenger side of steering column, mounted on panel.Front seating area, driver side, behind instrument panel, passenger side of steering column, mounted on panel.
The hazard flasher unit is located under the LH side of the instrument panel between the junction block and the brake pedal.
There is a fuse replacement to get the dash lights to work on a 1993 Seville. The fuse for the instrument panel is located in the fuse box inside the passenger side of the trunk.
really crappy light switch is my guess, but you can check the gauge fuse on the drivers side kick panel. The dimmer for the dash lights is pitiful, they may be bad there.
There is a 5 amp fuse in the upper right corner of the fuse panel by the drivers side left knee. I believe it is fuse #13. This fuse provides power to the dash instrument cluster.