1995 Ford Explorer lighting problems

Vehicle had been parked and locked for 30 hours prior to fire. Fire appears to have spontaneously ignited in the left side of the dash area of the headlight switch and dimmer control for the interior lights.

I have a 1995 ford explorer which the headlight sensor continuously goes bad which would not be an issue if the headlights would continue to work without it. When this sensor, which has gone bad twice since I have had the vehicle, fails I should not be made aware of this until the headlight goes bad and the sensor does not alert me. When the sensor goes bad I get an indication that the headlights are out and when replaced they are still out because the true problem is the sensor has gone bad.